Description:TECHNICAL FIELD
[0001] The present disclosure relates generally to the field of vehicle tyres. In particular, the present disclosure relates to an improved pneumatic tyre for vehicles which has an improved and durable bead profile design that provides distributed pressure over the rim flange and a rim base portion, reduces deflection over the rim flange, and provides firm contact with the rim.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] The tyre in a vehicle is mounted to the rim through the bead area of the tyre, which is also the only contact between the tyre and the vehicle as shown in FIG. 4. This contact is crucial for transferring the forces of the vehicle to the tyres and subsequently to the road. The bead area of the tyre is responsible for transmitting the full torque developed by the vehicle to the road, holding the tyre onto the wheel despite severe lateral and longitudinal forces, and acting as a barrier to seal against air loss.
[0004] As the sole contact between the tyre and the rim, the bead area significantly affects the tyre's ride and handling performance, uniformity, and durability. The flange area, which is the outer side of the bead area, is fitted in the rim flange, but the location and contact area between the tyre bead and the rim flange are not precisely defined in conventional bead designs as shown in FIG. 4, leading to issues such as excessive heat generation, rim chafing, and tyre construction failure. As contact forces can vary between the bead and rim flange and from rim to rim, nonlinear cornering behaviour and non-consistent bead durability may also occur.
[0005] Moreover, tyres of commercial vehicles such as pick-up trucks and the like or vehicles in an overloaded condition generally fail in the bead area mainly due to rim digging and deflation damages. Typically, OE vehicles are fitted with tubeless rims and tubeless tyres, however, in the replacement market, drivers may be using tube-type tyres on the same OE’s tubeless rim for overloading advantages. As a result, rim digging and other bead-related failures in tube-type tyres are bound to happen in vehicles in overloading applications when mounted on tubeless rim profiles.
[0006] In addition, during overloading conditions, the tyre bead profile may have a minimum contact area and very high-pressure distribution peek over the minimum metal flange of the rim if the tyre is not having firm contact in the rim base profile. Further, during vehicle running conditions and due to continuous deflection of the tyre, the bead area profile over the metal may damage the tyre bead area, which is also known as rim digging failure. Furthermore, if the tyre is not having firm mounting on the metal rim, this may result in the rocking movement effect with respect to the heel vertex point which may damage the inner tube which is also known as tube pinching by bead toe in the tyre field.
[0007] Efforts have been made to achieve a well-defined and optimized contact between the bead and rim to enhance handling performance and durability. For instance, patent document number US10821784B2 discloses a pneumatic tyre that includes a tread portion, a pair of opposing sidewall portions and a pair of opposing bead portions, where the tread portion is extending radially outwards from the sidewall portions and the sidewall portions extending radially outwards from the bead portions. Further, each bead portion includes an axially inward side and an axially outward side which are joined at the base of the bead portion and each axially outward side of the bead portion comprises a concave region extending axially inwards. Each concave region further comprises a convex region located within the concave region which extends axially outwards.
[0008] Another patent document number KR101106142B1 discloses a pneumatic tire for a vehicle having improved bead portions. The tire comprises a tread, sidewalls on both sides of the tread, and bead portions on both sides of the tread, where the tire is having a rim strip provided on the outer surface of the bead portion. The circumferential annular projection of the tire is provided on the outer surface of the hump strip to be contacted, so as to quantitatively grasp the degree of deformation of the bead by the rim flange of the heavy-load tire and to minimize the deformation of the bead.
[0009] Yet another patent document number FR2406530B1 discloses a tyre with rim mounting beads and a radial rim which is bent outwards and has a smooth transition of its section from the outside of its bead to the outside of the sidewall. Where the rim profile and the outside of the bead begin to separate the latter diverges away. The rim prevents abrasion wear at the rim profile, hence longer service life for the rim even if made of aluminium.
[0010] The above-cited references have tried to provide a firm contact between the bead and the rim and reduce the wearing of the bead area, however, the bead area profile of the tyres of cited references fails to overcome the rim chaffing and digging issues, tyre rocking effect with respect to heel point, and deflation damage issues due to tube pinching.
[0011] There is, therefore, a requirement in the art for a means to overcome the above drawbacks, shortcomings, and limitations associated with the rim chaffing and digging issues, the tyre rocking effect, and the deflation damage in the existing tyres, and to design and develop a simple, improved, and cost-effective tyre having a durable and improved bead profile that may help achieve distributed pressure over rim flange and a base portion, reduce deflection over the rim flange, and provide firm contact with the rim.

OBJECTS OF THE PRESENT DISCLOSURE
[0012] Some of the objects of the present disclosure, which at least one embodiment herein satisfy are as listed hereinbelow.
[0013] It is an object of the present disclosure to overcome the above drawbacks, shortcomings, and limitations associated with existing pneumatic tyres.
[0014] It is an object of the present disclosure to provide an improved tyre that overcomes rim chaffing and digging issues, tyre rocking effect, and deflation damage issues.
[0015] It is an object of the present disclosure to achieve distributed pressure over the rim flange and base portion, reduce deflection over the rim flange, and provide firm contact with the rim in the tyres of vehicles.
[0016] It is an object of the present disclosure to design and develop a tyre having a durable and improved bead profile that may help achieve distributed pressure over the rim flange and a base portion, reduce deflection over the rim flange, and provide firm contact with the rim.
[0017] It is an object of the present disclosure to design and develop a simple, improved, and cost-effective tyre having a durable and improved bead profile.

SUMMARY
[0018] The present disclosure relates to an improved pneumatic tyre for vehicles which has an improved and durable bead profile design that provides distributed pressure over the rim flange and a base portion, reduces deflection over the rim flange, and provides firm contact with the rim.
[0019] According to an aspect, the present disclosure elaborates upon a pneumatic tyre comprising a rubber notch configured radially upward from a bead heel to a lower sidewall of the tyre, and axially outward from the lower sidewall such that the rubber notch extends circumferentially between the bead heel and the lower sidewalls of the tyre
[0020] In an aspect, a base of bead portions associated with the tyre has a dual tapered bead profile comprising a first tapered portion and a second tapered portion, extending between a bead heel and a bead toe of the bead portions. The first tapered portion extends from the bead heel and diverges downwards up to the second tapered portion, and the second tapered portion extends from an end of the first tapered portion and converges upward up to the bead toe.
[0021] In an aspect, the first tapered portion extends from the bead heel and diverges downwards at a first predefined angle up to an intersection point between the first tapered portion and the second tapered portion. The first tapered portion diverges downwards at the first predefined angle from a line perpendicular to an equatorial plane of the tyre and extends across the bead heel.
[0022] In an aspect, the first predefined angle is 50 to 130.
[0023] In an aspect, the second tapered portion extends from the intersection point and converges upwards at a second predefined angle up to the bead toe. The second tapered portion diverges upwards at the second predefined angle from a second line perpendicular to an equatorial plane of the tyre and extends across an intersection point of the first tapered portion and the second tapered portion.
[0024] In an aspect, the second predefined angle is 20 to 60.
[0025] In an aspect, a radius of an intersection point between the first tapered portion and the second tapered portion is 4mm to 20mm.
[0026] In an aspect, a width of the first tapered portion is 40 to 70 % of a ledge width associated with the bead portion, and a width of the second tapered portion is 30 to 60 % of a ledge width associated with the bead portion.
[0027] In an aspect, the first tapered portion has a width of 5 to 180 mm, and the second tapered has a width of 5 to 80 mm.
[0028] In an aspect, the tyre has a heel diameter of 200 to 1300 mm.
[0029] In an aspect, the rubber notch has a thickness of 0.5 to 6 mm and a width of 5 to 30 mm, wherein a distance of the bead heel to a midpoint of the rubber notch is 5 to 30 mm.
[0030] According to another aspect, the present disclosure elaborates upon a pneumatic tyre comprising a tread portion, a pair of opposing side wall portions, and a pair of bead portions. The tread portions extend radially outwards from the side wall portions and the side wall portions extend radially outwards from the bead portions. Further, a base of the bead portions of the tyre has a dual tapered bead profile comprising a first tapered portion and a second tapered portion, extending between a bead heal and a bead toe of the bead portions. Furthermore, the first tapered portion extends from the bead heel and diverges downwards up to the second tapered portion, and the second tapered portion extends from the first tapered portion and converges upward up to the bead toe.
[0031] In an aspect, the tyre comprises a rubber notch configured radially upward from a bead heel to a lower sidewall of the tyre, and axially outward from the lower sidewall such that the rubber notch extends circumferentially between the bead heel and the lower sidewalls of the tyre.
[0032] According to yet another aspect, the present disclosure elaborates upon a pneumatic tyre comprising a tread portion, a pair of opposing sidewall portions and a pair of opposing bead portions. The tread portion extends radially outwards from the sidewall portions and the sidewall portions extend radially outwards from the bead portions. The pneumatic tyre comprises a rubber notch configured radially upward from a bead heel to a lower sidewall of the tyre, and axially outward from the lower sidewall such that the rubber notch extends circumferentially between the bead heel and the lower sidewalls of the tyre. The pneumatic tyre further comprises a dual tapered bead profile comprising a first tapered portion and a second tapered portion, extending between a bead heel and a bead toe of the bead portions. The first tapered portion extends from the bead heel and diverges downwards at a first predefined angle up to an intersection point between the first tapered portion and the second tapered portion, and the second tapered portion extends from the intersection point and converges upwards at a second predefined angle up to the bead toe. Further, the ratio between the second predefined angle with a horizontal plane to an angle formed with a normal from the rubber notch with the horizontal plane is between 2 to 6.
[0033] Various objects, features, aspects, and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent features.
[0034] Within the scope of this application, it is expressly envisaged that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible

BRIEF DESCRIPTION OF DRAWINGS
[0035] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description,
[0036] FIG. 1A illustrates an exemplary cross-section view of the proposed pneumatic tyre, in accordance with an embodiment of the present disclosure.
[0037] FIG. 1B illustrates an enlarged and detailed view of a bead area of the proposed pneumatic tyre of FIG. 1A.
[0038] FIGs. 2A and 2B illustrate exemplary views of the bead area of the proposed pneumatic tyre depicting the construction and dimension of the rubber notch and the dual tapered bead portion of the tyre, in accordance with an embodiment of the present disclosure.
[0039] FIG. 3 illustrates an exemplary view of the bead portion of the tyre mounted on a rim, in accordance with an embodiment of the present disclosure.
[0040] FIG. 4 illustrates an exemplary cross-section view of a conventional pneumatic tyre design without any rubber notch and dual tapered bead portion.

DETAILED DESCRIPTION
[0041] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0042] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[0043] Embodiments of the present disclosure elaborate upon an improved pneumatic tyre for vehicles which has an improved and durable bead profile design that provides distributed pressure over the rim flange and a base portion, reduces deflection over the rim flange, and provides firm contact with the rim.
[0044] The tyre generally may comprise a tread portion, shoulders, sidewalls, bead portion, carcass, belt, and inner liner, The tread portion is the part that comes in direct contact with the road when driving. The shoulders are located between the tread portion and the sidewalls and act as a transition between the tread portion and the sidewalls, for which reason they may be thicker than the sidewall areas. The flexible sidewalls are located between the shoulder and bead portion, to protect the carcass and enhance the ride. Further, sidewalls are also used to indicate the type, size, structure, pattern, manufacturing company, product name and the like of the tyre.
[0045] The carcass represents the tyre structural framework and acts to support air pressure, and vertical load and absorb shocks, The breaker is a cord layer placed between the carcass and the tread in order to protect the carcass of a tyre. The breaker reduces shocks, and prevents rips or injury of the tread from reaching the carcass directly while also stopping the separation between the rubber layer and the carcass. The belt is a strong reinforcement found between the tread and the carcass in a radial or belted bias tyre, It functions much like the breaker but also increases tread rigidity by tightly winding about the carcass.
[0046] The inner liner is made of a layer of rubber that resists air diffusion and replaces the inner tube within a tyre. Generally made of a (halogenated) butyl rubber, the inner liner maintains the air inside the tyre. The bead is the part of the tyre that attaches the tyre to the rim and wraps the end of the tyre's cord fabric, Comprised of the bead wire, core, flipper and other parts, the bead is generally designed to be slightly tight around the rim so that in the case of a sudden drop in inflation pressure, the tyre will not fall off the rim,
[0047] The rim comprises a pair of rim flanges each receiving a bead outside surface of a tyre, a pair of rim bead seats each extending inwardly from the rim flange and receiving the bead base surface of a tyre, a well region between the rim seats, and a ridge, hump, or bump positioned behind the rim's bead seats that are intended to help retain the bead portion of the tyre on the rim bead seat if they do experience an unusually large sideways force and/or if the tyre pressure is lower than desired. The rim flange and rim seat are smoothly connected to each other through a curvature heel region.
[0048] The wheel assembly comprises the tyre and a standard rim. When assembling the tyre in the standard rim, the bead base surface is seated on the rim seat of the standard rim, and the bead outside surface abuts against the rim flange, The rims are regulatory determined by the industry standards in force in the region where the tyres are produced or used.
[0049] Referring to FIGs. 1A and 1B, the proposed pneumatic tyre “tyre” or “tire” 100 can include a tread portion 102, a pair of opposing sidewall portions 104, and a pair of opposing bead portions 106. The tread portion 102 extends radially outwards from the sidewall portions 104 and the sidewall portions 104 extend radially outwards from the bead portions 106.
[0050] The tyre 100 can further include a rubber notch 108 configured radially upward from a bead heel (H) to a lower sidewall 104-1 of the tyre 100, and axially outward from the lower sidewall 104-1 such that the rubber notch 108 extends circumferentially between the bead heel H and the lower sidewalls 104-1 of the tyre 100. The detailed construction and dimension of the rubber notch 108 have been described later in conjunction with FIGs. 2A and 2B. Further, a base 110 of bead portions 106 associated with the tyre 100 can have a dual tapered bead profile 110 comprising a first tapered portion 110-1 and a second tapered portion 110-2, extending between a bead heel H and a bead toe (T) of the bead portions 106. The first tapered portion 110-1 can extend from the bead heel H and diverge downwards up to the second tapered portion 110-2. Further, the second tapered portion 110-2 extends from an end of the first tapered portion 110-1 and converges upward up to the bead toe. The detailed construction and dimension of the dual tapered bead portion have been described later in conjunction with FIG. 2A.
[0051] In an embodiment, the first tapered portion 110-1 can extend from the bead heel H and diverge downwards at a first predefined angle (α) up to an intersection point (IP) between the first tapered portion 110-1 and the second tapered portion 110-2. The first tapered portion 110-1 can diverge downward at the first predefined angle (α) from a line perpendicular to an equatorial plane of the tyre 100 and extending across the bead heel H. In an exemplary embodiment, the first tapered portion 110-1 can diverge downwards at the first predefined angle (α) of 50 to 130 from the line perpendicular to the equatorial plane of the tyre 100.
[0052] Further, the second tapered portion 110-2 can extend from the intersection point IP between the first tapered portion 110-1 and the second tapered portion 110-2 and further converge upwards at a second predefined angle (β) up to the bead toe T. The second tapered portion 110-2 can diverge upward at the second predefined angle (β) from a second line perpendicular to the equatorial plane of the tyre 100 and extend across the intersection point IP of the first tapered portion 110-1 and the second tapered portion 110-2. In an exemplary embodiment, the second tapered portion 110-2 can diverge upward at the second predefined angle (β) of 20 to 60 from the line perpendicular to the equatorial plane of the tyre.
[0053] Referring to FIG. 2A, in an embodiment, the width W1 of the first tapered portion 110-1 of the bead portion 106 can be 40 to 70 % of the ledge width W associated with the bead portion 106. Further, the width W2 of the second tapered portion 110-2 of the bead portion 106 can be 30 to 60 % of the ledge width W associated with the bead portion 106. In an exemplary embodiment, the first tapered portion 110-1 can have a width W1 of 5 to 180 mm, and the second tapered portion 110-2 can have a width W2 of 5 to 80 mm. As illustrated, the first tapered portion 110-1 can diverge downwards at the first predefined angle (α) of 50 to 130 from the line perpendicular to the equatorial plane of the tyre. Further, the second tapered portion can diverge upwards at the second predefined angle (β) of 20 to 60 from the line perpendicular to the equatorial plane of the tyre 100.
[0054] In an embodiment, the radius (R) of the intersection point IP between the first tapered portion 110-1 and the second tapered portion 110-2 can be 4mm to 20mm. Further, the tyre 100 can have a heel diameter (D1) of 200 to 1300 mm.
[0055] Referring to FIG. 2A and 2B, in an embodiment, the rubber notch 108 can have a thickness (A) of 0.5 to 6 mm and a width (B) of 5 to 30 mm. Further, the distance D2 of the bead heel to a midpoint of the rubber notch 108 is 5 to 30 mm.
[0056] In an exemplary embodiment, the ratio between the second predefined angle (β) (formed by the second tapered portion 110-2) with a horizontal plane/a line X-X' extending in the axial direction from the heel point H to an angle (µ) formed with a normal (N) from the midpoint of the rubber notch 108 with the horizontal plane/line X-X’ can be between 2 to 6.
[0057] Referring to FIG. 3, the tyre 100 is adapted to be mounted on a rim 300 associated with a wheel assembly or a vehicle. When assembling the tyre 100 over the rim 300, the bead portion or bead area 106 of the tyre attaches the tyre 100 to the rim 300 and wraps the end of the tyre's cord fabric. The bead portion 106 includes bead wire, core, flipper and other parts, which is having the dual tapered profile as explained in FIGs. 1A to 2B. This allows the bead portion 106 of the proposed tyre 100 to tight around the rim 100 so that in the case of a sudden drop in inflation pressure, the tyre 100 may not fall off the rim 300,
[0058] The rim 300 can include a pair of rim flanges 302 each receiving a bead outside surface of the tyre 100, a pair of rim bead seats 304 each extending inwardly from the rim flange 302 and receiving the bead base surface 110 of the tyre 100, a well region between the rim seats 302, and a bump (ridge or hump) 304 positioned behind the rim's bead seats 304 that are intended to help retain the bead portion 106 of the tyre 100 on the rim bead seat 304 if they do experience an unusually large sideways force and/or if the tyre 100 pressure is lower than desired. The rim flange 302 and rim seat 304 are smoothly connected to each other through a curvature heel region. When assembling the tyre in the standard rim, the bead base surface of the dual tapered bead is seated on the rim seat of the rim, and the bead outside surface of the dual tapered bead abuts the rim flange,
[0059] Those skilled in the art would appreciate that the rubber notch can protect the tyre against rim chaffing and digging. Further, the dual tapered bead profile 110 and the rubber notch 108 can facilitate firm seating and retention of the tyre 100 on the rim 100 with a hump. As a result, during overloading conditions, the tyre bead profile area 106 can have improved contact area and lower pressure distribution peek over the flange area 302 of the rim 300 as the tyre 100 is having a firm contact in the rim base profile. Moreover, during vehicle running condition, there is no deflection of the tyre bead area profile 106 over the rim 300, so rim 300 chaffing and digging may be lowered or prevented and the tyre bead area 106 may remain undamaged due to rim digging failure, thereby making the tyre 100 durable and long-lasting. In addition, as the tyre 100 is having firm mounting on the metal rim 300, the rocking movement effect with respect to the heel vertex point will also be reduced, which could have damaged the inner tube (tube pinching) of the tyre 100 as in the case of existing tyres.
[0060] It is to be appreciated by a person skilled in the art that while various embodiments of the present disclosure elaborate upon the rubber notch 108 and the dual tapered bead portion 106/110 having specific dimensions, however, the rubber notch 108 and the dual tapered bead portion 106/110 can have any other dimensions as well with some modifications based on type and profile of the rim and overall wheel assembly, and all such embodiments are well within the scope of the present disclosure, without any limitations.
EXPERIMENTS
[0061] Bead pressure distribution scanning was done on the proposed tyre as per ATL’s standard. Further, physical mounting and evaluation were also performed to test the durability of the proposed tyre. In an implementation, during accelerated field evaluation (AFE), the front and rear tyres of various vehicles were tested at an inflation pressure of 70 psi and 100 psi respectively for a longer time period of up to one year. The vehicles were subjected to a load ranging from 4100 kg to 5300 kg (which is about 150 to 200 % overloading condition) and were operated at an average speed ranging from 60-70 kmph.
[0062] Further, during controller field evaluation (CFE), multiple numbers of front and rear tyres of various vehicles were tested at an inflation pressure of 70 psi and 100 psi respectively for a longer time period of up to one year. The vehicles were subjected to a load of 4800 kg at 175 to 200 % overloading conditions and were operated at an average speed ranging from 50-60 kmph.
[0063] Furthermore, during seed marketing field evaluation, multiple numbers of front and rear tyres of various vehicles were tested at an inflation pressure of 70 psi and 100 psi respectively for a longer time period. The vehicles were subjected to a load of 4800 kg at 175 to 200 % overloading conditions and were operated at an average speed ranging from 50-60 kmph.
[0064] The bead pressure distribution scanning gave improved results in the proposed tyre design compared to existing designs. Further, no substantial rim digging and deflation damages were found in the tyres (AFE+ CFE tyres, seed marketing tyres).
[0065] Accordingly, the present invention overcomes overcome the above drawbacks, shortcomings, and limitations associated with the rim chaffing and digging issues, the tyre rocking effect, and the deflation damage in the existing tyres of FIG. 4, by designing and developing a simple, improved, and cost-effective tyre having a durable and improved bead profile that may help achieve distributed pressure over rim flange and a base portion, reduce deflection over the rim flange, and provide firm contact with the rim.
[0066] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0067] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0068] Moreover, in interpreting the specification, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc.
[0069] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are comprised to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0070] The proposed invention overcomes the above drawbacks, shortcomings, and limitations associated with existing pneumatic tyres.
[0071] The proposed invention provides an improved tyre that overcomes rim chaffing and digging issues, tyre rocking effect, and deflation damage issues.
[0072] The proposed invention achieves distributed pressure over the rim flange and base portion, reduces deflection over the rim flange, and provides firm contact with the rim in the tyres of vehicles.
[0073] The proposed invention designs and develops a tyre having a durable and improved bead profile that may help achieve distributed pressure over the rim flange and a base portion, reduce deflection over the rim flange, and provide firm contact with the rim.
[0074] The proposed invention designs and develops a simple, improved, and cost-effective tyre having a durable and improved bead profile.
, Claims:1. A pneumatic tyre (100) comprising:
a rubber notch (108) configured radially upward from a bead heel (H) to a lower sidewall of the tyre (100), and axially outward from the lower sidewall such that the rubber notch (108) extends circumferentially between the bead heel (H) and the lower sidewalls (104-1) of the tyre (100).
2. The pneumatic tyre (100) as claimed in claim 1, wherein a base (110) of bead portions (106) associated with the tyre (100) has a dual tapered bead profile (110) comprising a first tapered portion (110-1) and a second tapered portion (110-2), extending between the bead heel (H) and a bead toe (T) of the bead portions (106),
wherein the first tapered portion (110-1) extends from the bead heel (H) and diverges downwards up to the second tapered portion (110-2), and the second tapered portion (110-2) extends from an end of the first tapered portion (110-1) and converges upward up to the bead toe (T).
3. The pneumatic tyre (100) as claimed in claim 2, wherein the first tapered portion (110-1) extends from the bead heel (H) and diverges downwards at a first predefined angle (α) up to an intersection point (IP) between the first tapered portion (110-1) and the second tapered portion (110-2), wherein the first tapered portion (110-1) diverges downwards at the first predefined angle (α) from a line perpendicular to an equatorial plane of the tyre (100) and extending across the bead heel (H).
4. The pneumatic tyre (100) as claimed in claim 3, wherein the first predefined angle (α) is 50 to 130.
5. The pneumatic tyre (100) as claimed in claim 2, wherein the second tapered portion (110-2) extends from the intersection point (IP) and converges upwards at a second predefined angle up (β) to the bead toe (T), wherein the second tapered portion (110-2) diverges upwards at the second predefined angle (β) from a second line perpendicular to an equatorial plane of the tyre (100) and extending across the intersection point (IP) of the first tapered portion (110-1) and the second tapered portion (110-2).
6. The pneumatic tyre (100) as claimed in claim 5, wherein the second predefined angle (β) is 20 to 60.
7. The pneumatic tyre (100) as claimed in claim 5, wherein a radius of an intersection point (IP) between the first tapered portion (110-1) and the second tapered portion (110-2) is 4mm to 20mm.
8. The pneumatic tyre (100) as claimed in claim 2, wherein a width (W1) of the first tapered portion (110-1) is 40 to 70 % of a ledge width (W) associated with the bead portion (106), and a width (W2) of the second tapered portion (110-2) is 30 to 60 % of a ledge width (W) associated with the bead portion (106).
9. The pneumatic tyre (100) as claimed in claim 2, wherein the first tapered portion (110-1) has a width (W1) of 5 to 180 mm, and the second tapered portion (110-2) has a width (W2) of 5 to 80 mm.
10. The pneumatic tyre (100) as claimed in claim 2, wherein the tyre (100) has a heel diameter of 200 to 1300 mm.
11. The pneumatic tyre (100) as claimed in claim 11, wherein the rubber notch (108) has a thickness (A) of 0.5 to 6 mm and a width (B) of 5 to 30 mm, wherein a distance (D) of the bead heel (H) to a mid point of the rubber notch (108) is 5 to 30 mm.
12. A pneumatic tyre (100) comprising:
a tread portion (102), a pair of opposing side wall portions (104), and a pair of bead portions (106), wherein the tread portions (102) extend radially outwards from the side wall portions (104) and the side wall portions (104) extend radially outwards from the bead portions (106);
wherein a base (110) of the bead portions (106) of the tyre (100) has a dual tapered bead profile (110) comprising a first tapered portion (110-1) and a second tapered portion (110-2), extending between a bead heel (H) and a bead toe (T) of the bead portions (106),
wherein the first tapered portion (110-1) extends from the bead heel (H) and diverges downwards up to the second tapered portion (110-2), and the second tapered portion (110-2) extends from the first tapered portion (110-1) and converges upward up to the bead toe (T).
13. The pneumatic tyre (100) as claimed in claim 12, wherein the tyre (100) comprises a rubber notch (108) configured radially upward from the bead heel (H) to a lower sidewall (104-1) of the tyre (100), and axially outward from the lower sidewall (104-1) such that the rubber notch (108) extends circumferentially between the bead heel (H) and the lower sidewalls (104-1_ of the tyre (100).
14. A pneumatic tyre (100) comprising a tread portion (102), a pair of opposing sidewall portions (104) and a pair of opposing bead portions (106), the tread portion (102) extending radially outwards from the sidewall portions (104) and the sidewall portions (104) extending radially outwards from the bead portions (106), the pneumatic tyre (100) comprising:
a rubber notch (108) configured radially upward from a bead heel (H) to a lower sidewall (104-1) of the tyre (100), and axially outward from the lower sidewall such that the rubber notch (108) extends circumferentially between the bead heel (H) and the lower sidewalls (104-1) of the tyre (100); and
a dual tapered bead profile (110) comprising a first tapered portion (110-1) and a second tapered portion (110-2), extending between a bead heel (H) and a bead toe (T) of the bead portions (106),
wherein the first tapered portion (110-1) extends from the bead heel (H) and diverges downwards at a first predefined angle (α) up to an intersection point (IP) between the first tapered portion (110-1) and the second tapered portion (110-2), and the second tapered portion (110-2) extends from the intersection point (IP) and converges upwards at a second predefined angle (β) up to the bead toe (T), and

wherein the ratio between the second predefined angle (β) with a horizontal axis (X-X’) extending axially along the bead heel (H) to an angle formed with a normal from the rubber notch (108) with the horizontal axis (X-X’) is between 2 to 6.