TECHNICAL FIELD [0001] The present subject matter relates generally to a motor vehicle, and more particularly to a wheel assembly for the motor vehicles. BACKGROUND [0002] Generally, in a motor vehicle a frame assembly acts as a skeleton and 5 as a structural member that supports the various vehicle loads. Some vehicles have a body structure that acts as structural member and load bearing member, and such structures are generally referred to as monocoque structures. The structural member also supports a power unit of the vehicle. The power unit generates required torque or power that is transferred to a wheel assembly of the 10 vehicle. The vehicle may include one or more wheel assembly that are connected to the structural member and wheel assembly provides motion to the vehicle. Moreover, the vehicle is provided braking system that enables the user to slow down or bring vehicle to a halt. Generally, the braking system is also mounted to the wheel assembly of the vehicle. 15 BRIEF DESCRIPTION OF THE DRAWINGS [0003] The detailed description of the present subject matter is described with reference to the accompanying figures. Same numbers are used throughout the drawings to reference like features and components. [0004] Fig. 1 (a) illustrates a left side of an exemplary motor vehicle, in 20 accordance with an embodiment of the present subject matter. [0005] Fig. 1 (b) illustrates a perspective view of a wheel assembly, in accordance with the embodiment of Fig. 1 (a). [0006] Fig. 1 (c) depicts another perspective view of the wheel assembly, in accordance with the embodiment as depicted in Fig. 1 (b). 25 [0007] Fig. 1 (d) depicts an exploded view of the wheel assembly, in accordance with the embodiment of Fig. 1 (c). [0008] Fig. 1 (e) depicts a perspective side view of the wheel assembly. OF FT f.F f R F M' W A T R 7 / O 3 / 7 ft V ft f fi * 3 ft 2 [0009] Fig. 1 (f) depicts an enlarged view of the wheel assembly depicted in Fig. 1 (e). [00010] Fig. 2 (a) depicts a perspective side view of a central member, in accordance with the embodiment of Fig. 1 (d). 5 [00011] Fig. 2 (b) depicts another perspective view of the central member, in accordance with the embodiment of Fig. 2 (a). [00012] Fig. 2 (c) depicts an enlarged view of the central member of the wheel assembly. [00013] Fig. 3 depicts a wheel assembly, in accordance with another 10 embodiment of the present subject matter. DETAILED DESCRIPTION [00014] Typically, in motor vehicles, the wheel assembly is rotatably connected to the structural member of the vehicle. Generally, motor vehicles are provided with spoke wheels that include multiple spokes. However, the multiple 15 spokes require periodic tightening. Moreover, spoke wheels when subjected to severe impacts or to high compression forces, the wheel tends to fail. With time, U) GJ there was a transition from spoke wheels to alloy wheels. The alloy wheels Qi require almost no maintenance and can reduce the unsprung weight or overall jZ weight of the vehicle. Moreover, the alloy wheels are better in withstanding E o CN 20 compression forces and high impacts acting on them. However, failure or damage lO to CO js«. need for replacement of the entire wheel. In case of conventional alloy wheels o O 25 with replaceable rims, the rim along with the spokes is integrally formed. CO of any portion of the alloy wheel requires replacement of the entire part as it is generally integrally formed as a single piece. Conventionally, improvements have been made to provide alloy wheels with replaceable hub or rim that eliminates the O CN However, the conventional alloy wheels are subject to manufacturing variations because of which a pre-load is applied on the arms in order to align the spokes of l^ the alloy wheel to the hub. Consequently, due to pre-load applied on the spokes, js«. any small impact or compression may result in cracks or breakage of the arms. CO O (0 CN o 30 Any such failures will necessitate replacement of the rim portion of the wheel. [00015] Moreover, even in alloy wheels with replaceable hub or rim, problem of heat dissipation exists especially at hub portion. Especially, in wheels provided with drum brakes, the brake shoes are installed in a hub portion of the wheel and during application of brake the brake shoes come in contact with surface of the 5 hub portion thereby bringing the motor vehicle to complete halt or a reduced speed. However, by virtue of the structure of the alloy wheel, the wheel offers poor heat dissipation, especially in case of drum with hub portion. Therefore, the wheel hub portion is subject to wear that further results in failure of the hub portion. Moreover, even if the hub does not fail, the excessive heat also affects 10 the braking performance, which is unsafe. Additionally, in case of two-wheeled vehicles or the like, the wheel gets connected to a sprocket or the like that receives power from the power unit. Therefore, additional challenge is to provide the wheel that can optimally transfer the forces from the central member to the rest of the structure without forming stress points at certain locations. 15 [00016] Additionally, the replaceable type alloy wheel assembly results in increased weight due to reinforcing of various connection points of the wheel and load points of the wheel as the wheel is not integrally formed. Because of the multiple reinforcing points, the material usage is more which also increases the cost of the wheel. This makes the wheel bulkier and making it complex to be 20 deployed in vehicles with compact layout or in vehicle with low capacity. Moreover, the heavier wheel, having higher inertia, provided on the vehicle requires more power for providing motion. This affects the performance of the motor vehicle as additional weight affects fuel economy and acceleration especially for initial motion conditions. 25 [00017] Thus, there is a need for a wheel assembly that addresses the aforementioned and other problems and is capable of providing improved life of the parts of the assembly at the same time should be capable of providing compact and rigid structure. [00018] The present subject matter provides a wheel assembly that can be 30 rotatably mounted to the vehicle to either a drive wheel or a steering wheel. The wheel assembly includes an outer peripheral member that is capable of FT TtTTTTF "f-K-PTartJio CT7^L.aXZJLELl-fi" V fi ; 3 £ : 4 supporting tyre. A core member disposed concentrically inward of the outer peripheral member and plurality of arms that connect the outer peripheral member and the core member. The core member includes a receiving aperture that enables detachable-mounting of a central member. The central member is 5 secured to the core member through one or more fasteners. [00019] It is a feature of the present subject matter that the wheel assembly includes an engagement portion that is formed on the core member. An inward end of the plurality of arms is connected to the core member at the engagement portion. Also, the central member is secured to the core member at the 10 engagement portion(s). It is an advantage that a common portion, which is an engagement portion, is provided that supports the inward ends of the arms and also enables securing of the detachable type central member thereat thereby using optimum material for the structure. [00020] It is another feature that the wheel assembly is capable of working 15 with at least three arms. Therefore, it is an advantage that the present subject Q) matter provides the flexibility to use central member with three or more CO Q_ engagement portion according to the number of the arms. _0) ^ [00021] It is an aspect that the engagement portion of the core member »—- includes a First-radial boss. Similarly, the central member is provided with a CN C 20 second-radial boss matching profile of the first-radial boss. The first-radial boss O and second-radial boss with similar profile enable provide proper contact area LL JJ5 therebetween. Therefore, it is an advantage that the engagement portion enables to Co optimum load transfer as the forces are directly transferred from the arms to the h- O core member and the central member. O ^ 25 [00022] It is a feature that the first-radial boss is preferably having a profile CO J" tapering in a radial direction towards the arms. In other words, from the arms the d first-radial boss is diverging towards the body of the core member thereby enabling any impacts acting on the arms to be distributed to the core member thereby reducing failure of part. Is- h- h- ^- CO o CN iLP'ATFHT' TVFFT P~F rTrFMTnrT R-?TRTO"ff1R "1-R' 3 8 (0 ■ O D [00023] In one implementation, the first-radial boss is having substantially a triangular profile with a vertex forming tapered end and a base forming connection to the core member. The second boss abutting the first boss is also provided with a profile/cross-section complementing the profile of the first boss 5 thereby providing good contact. [00024] It is a feature that the central member is provided with a rotation-locking portion that engages with the fasteners restricting angular rotation of the fasteners. Also, the rotation-locking portion enables the fasteners to be in a desired orientation during assembly. 10 [00025] Also, the central member provided with one or more scooped portion(s) to reduce the weight thereof without affecting structural rigidity. This enables the central member to be of light weight. [00026] It is a feature that the core member is having a continuous circumferential profile with a receiving aperture defined at the center, the -Fpi-rF—r H F-NTqrftT"" ' 'HITR"TT? B 1 £_JL£XX&. 9 core member 210 is disposed concentrically to the outer peripheral member 215 about an axis A-A' and is having a diameter substantially lesser than a diameter of the outer peripheral member 215. The core member 210 is having closed circumferential profile that enables in sharing of loads between the arms. The 5 axis A-A' is the axis of rotation of the wheel assembly 200. Furthermore, plurality of arms 220 connects an inner peripheral portion of the outer peripheral member 215 to the core member 210. In one embodiment, the arms 220 are extending in a radial direction. In the depicted embodiment, the arms 220 are disposed at angle with respect to an imaginary radial line of the wheel assembly 10 200. Further, the core member 210 defines a receiving aperture 210A (shown in Fig. 1 (d)) for receiving a central member 235. Fig. 1 (d) depicts an exploded view of the wheel assembly 200, in accordance with the embodiment of Fig. 1 (c). [00040] The receiving aperture 210A is having a cylindrical inner profile that 15 could receive the central member 235, wherein the central member 235 is also having a cylindrical outer profile and is secured to the core member 210. Further, plurality of fasteners 240 secure the central member 235 to the core member 210 whereby a secure assembly is formed. Further, the central member 235 is provided with mounting holes 235M that are capable of aligning with mounting 20 holes 210M provided on the core member 210, wherein the mounting holes 210M, 235M extend substantially in axial direction and one or more fasteners 240 are provided to secured thereof. In the present implementation, the fasteners 240 are nut 240N bolts 240B that are used for securing the assembly as a single piece. 25 [00041] Additionally, the wheel assembly 200 of the present subject matter is adapted to work with at least three arms 220. In the present implementation, five arms are used that are angularly spaced at equal internals thereof. Therefore, the wheel assembly 200 of the present subject matter provides flexibility to choose three or more arms depending on design requirement or strength requirements. 30 Fig. 1 (e) depicts another perspective view of the wheel assembly 200, in QLETTC E C HOOOQ::. e:x7 a-3~?-2 01 $ vKr.3~s~:"." ~ 10 accordance with the embodiment as depicted in Fig. 1 (b). Fig. 1 (f) depicts an enlarged view of the wheel assembly 200, in accordance with the embodiment of Fig. 1 (e). The core member 210 as shown in Fig. 1 (e) is having a round or circular profile and includes at least three first-radial boss 210B that are provided 5 on the core member 210. Similarly, the central member 235 is also provided with a second-radial boss 235B matching the profile of the first-radial boss 210B of the core member 210. The first-radial boss 210B forms the engagement portion EP for securing the detachable central member 235 to the core member 210. Also, the core member inward ends of the plurality of arms 220 are connected to 10 the core member 210 at the engagement portion(s) EP. Therefore, the engagement portion EP of the wheel assembly 200 provided on the core member 210 provided optimum load transfer as the loads are directly transferred from the arms 220 to the core member 210 and the central member 235. The mounting holes 210M, 235M are respectively provided on the bosses 210B, 235B. Also, the 15 arms 220 extend from the outer peripheral member 215 towards the first-radial fl) boss 210B of the core member 210. Therefore, the wheel assembly 200 provides Jf optimum structure that has common portion for the arm 200 connecting to the Qi core member 210 and the core member 210 being fastened to the central member j~ 235 thereby eliminating need for different mounting locations and eliminating CN 20 excess material. £r [00042] As depicted in Fig. 1 (f), the first-radial boss 210B of the core \^ member 210 are tapering towards the arm 220, wherein the arm is connected at a lO to tapered end of the first-radial boss. In other words, the portion of the boss 210B CO ^ connected to the arm 220 is having a narrow cross-section compared to an end ^ 25 portion that is contact with the core member 210. This enables forces being CO transferred from the outer peripheral member 215 to the core member 210 to be O effectively distributed to rest of the core member 210. Further, the boss 210B is h» having substantially similar cross-sectional side/face compared to the Is- t cross-sectional side/face of the second-radial boss 235B of the central member 30 235. This enables is providing optimum contact between the two members 210, CO ° p 'KJ-FWT ' rrFT"rn= rff FWMnarr- fnrrrr* v ? n i ar - r B"» 3~ s ■ (0 S " 235 thereby enabling force transfer, which typically is transfer of the torque from the power unit 110 to the wheel assembly 200 Also, in the present implementation, the boss 210B, 235B is having substantially a triangular profile T with a vertex TV, which is the tapered end, is formed by the two tapering sides 5 of the boss 210B/235B. The tapering sides of the boss 21 OB converge to a vertex that accommodates the mounting holes 210M and gets connected to the arms 220. A base portion TB of the triangle T is connected to the core member 210. Similarly, the central member 235 is also having a triangular profile that is disposed substantially in the same orientation as that of the core member 210 10 thereby providing maximum contact between the members. Moreover, the boss 210B/235B can be adapted to have any geometrical regular or irregular shape profile depending on the shape or number of the arms 220. [00043] Further, Fig. 1 (f) depicts the bolt 240B that fastens the central member 235 to the core member 210. The central member 235 is provided a 15 rotation-locking portion 245 that engages with a bolt head 240BH of the bolt Q) 240B. The rotation-locking portion 245 is provided on the axial face of the CO n central member 235 against which the bolt 240B abuts. The axial face is provided — with the rotation-locking portion 245, which in the present implementation is a CN E o ^ protruded portion having at least one side that abuts with the bolt head 240BH. 20 The bolt head 240BH is provided with a side that abuts against the at least one side of the protruded portion 245. In the depicted embodiment, the side of the It protruded portion 245is flat and the side of the bolt head 240BH is provided with lO oo O o to flat side, whereby the bolt 240B abuts against the protruded portion 245and is restricted from any rotation. However, in another embodiment, the 25 rotation-locking portion 245 can have any shape and a negative portion is CO provided on the bolt 240B that enables locking therebetween. In another © embodiment, the rotation-locking portion 245 may be a cavity in which a head of h- the bolt with conforming cavity profile is engaged to lock with each other. Is- h> ^ [00044] Further, the central member 235 is having one or more scooped OO 30 portion(s) 250 that are provided to reduce the weight of the central member 235 Op A- T F NTT n'FFTTT' l" H F U ET "A"T FrT7Tr3"T fTf 8 1 fi ■■ 3 ST ■ g 12 without affecting the structural rigidity thereof. In the present implementation, the scooped portion(s) 250 are provided at the boss portion 235B and in proximity to the base portion TB. Further, the scooped portion(s) 250 are having a triangular shape with the base of the triangular shaped scooped portions facing 5 the base of the triangle formed by the boss 235B. Furthermore, a flange 245F is provided that supports the protruded portion 245. This provides the structural strength to the protruded portion 245to withstand tightening torque/force acting on the protruded portion 245. [00045] Further, in the depicted implementation, the core member 210 is 10 having a closed circumferential profile with the receiving aperture 210A defined at the center. The receiving aperture 210A is provided to match an outer circumferential profile of tfie central member 235. The closed circumferential profile enables sharing of loads between the arms 220 thereby transferring the loads from one arm to another arm reducing impacts on the central member 235. 15 Further, the core member 210 is having a first width Wl and the central member 235 is having a second width W2. The term 'width' used herein refers to thickness thereof. The second width W2 is substantially greater than the first width Wl, wherein width of the axial- securing portion 255 is lesser than the width of the core member 210 as the core member 210 receives the forces from 20 the outer peripheral member 215 through the arm 220 and also the receives torque from the power unit 110. Therefore, the core member 210 is provided with higher cross-section to withstand shear forces and other forces acting thereon. However, the total width of the central member 235 including the portion that is axially in contact with the core member 210 is substantially high. 25 [00046] In one implementation, the central member 235 is a casted part and is made a metal alloy. Similarly, the outer peripheral member 215 and the core member 210 are also casted type that are made of a metal alloy. Further, the plurality of arms 220 can be integrally formed with the core member 210 and the outer peripheral arm 215. However, the plurality of arms 220 can be n.-FF-T rr r ffRKraAT ft ? / fl 3 .O Q1.E l_fi~Xft~ — 13 independently formed to enable ease of replacement and also provides ease of manufacturability due to use of independent parts. [00047] Fig. 2 (a) depicts a perspective view of the central member, in accordance with the embodiment of Fig. 1 (d). Fig. 2 (b) depicts another 5 perspective view of the central member, in accordance with the embodiment of Fig. 2 (a). The central member 235 includes a first portion 255 (which is axial-securing portion 255), an intermediate portion 260, and a second portion 265 (heat sink portion 265). The terms first portion 255 and axial-securing portion 255, and the second portion 265 and the heat sink portion 265 are 10 interchangeably used herein. The intermediate portion 260 is sandwiched between the first portion 255 and the second portion 265 and is preferably integrally formed with thereof. The first portion 255 is a plate like structure that is disposed on axial end portion of the central member 235. The first portion 255 is having an outer face with partitions 235P that are capable of accommodating 15 cushion members that enables transfer of torque from the driven sprocket 205 to 0) ... O) the central member 235. For example, a cushion member is a Cush drive, acting CO Q_ as a damper that is preferably made of elastic/flexible material. Further, the — intermediate portion 260 and the second portion 265 are preferably made with a CN E o H^ cylindrical inner portion, wherein the intermediate portion 260 and at least a 20 portion of the second portion 265 are capable of accommodating a drum brake assembly 230. The cylindrical inner portion is provided with factional profile and 1^ the drum brake assembly 230 includes plurality of brake shoes with liner lO oo O o tO provided on annular surface. The liner provided on the brake shoes engages with the inner cylindrical profile of the central member 235 thereby creating friction 25 between the brake shoe that are stationary and the central member 235 that CO rotates along with the wheel assembly 200. O CN| [00048] Further, the second portion 265 is provided with plurality of heat Is.. dissipating members 270 disposed on the outer periphery of the second portion ^ 265. In the present implementation, outer periphery of the second portion 265 is Co 30 also having a circular profile and the heat dissipating members 270 are provided CNIp AT FW'T"~n•F"FTTF^~r.-|TFW'lOrT---pr7 VWl 7 ? H X ft . t fi •■ 3 8 ■ (0 3 14 on the outer periphery. In the present implementation, the heat dissipating members 270 is a cooling fin 270 structure that is integrally formed with the second portion 265. Therefore, the terms heat dissipating members 270 and cooling Fins 270 are interchangeably used. The cooling fins 270 are separated in 5 axial direction thereby providing greater area to be exposed to the atmosphere for heat dissipation. When the vehicle is operated, the wheel assembly 200 is rotating whereby the central member 235 provided with the cooling fins is also rotating. Air flowing onto the central member 235, especially onto the second portion 265 that is substantially at an offset from the wheel lateral center enables cooling of 10 the wheel assembly 200. Heat generated at the central member 235 due to braking is dissipated into the atmosphere thereby enabling cooling of the central member 235 thereby cooling the brake assembly for optimum performance. Further, cooling of the central member 235 also reduces wear out thereby improving the life of the central member 235. 15 [00049] Fig. 3 depicts a perspective view of a wheel assembly 300, in O accordance with another embodiment of the present subject matter. The wheel CO Q_ assembly 300 includes a core member 210 and an outer peripheral member 215. — Plurality of arms 220 connects the outer peripheral member 215 to the core CN E o ^ member 210. Further, a central member 335 is detachably connectable to the core 20 member 210. The central member 335 is capable of supporting a disc member 310 of a disc brake assembly (not shown). The disc brake assembly also includes it a caliper assembly that works in conjunction with the disc member 310. During lO oo O o Jg actuation of the brake, the caliper assembly exerts frictional force on the disc member 310 that is rigidly connected to the central member 335 through 25 fasteners 315. The disc member 310 that is made of metal is in contact with the CO central member 335 that is also made of metal thereby enabling transfer of heat therebetween. The central member 335 includes second portion 265 (similar to as shown in the Fig. 2 (a)) that is provided with heat dissipating members. Preferably, the second portion 265 is disposed to be in proximity to the disc O CN Is- shown in the Fig. 2 (a)) that is provided with heat dissipating members Is- h- ^- CO (0 CN o 15 member 310 to enable effective heat transfer through the heat dissipating members. [00050] It is to be understood that the aspects of the embodiments are not necessarily limited to the features described herein. Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described. CD U) CO Q_ CD CN E o LL to CO h- o o CO o ^- CO Jgjv* T^TT-^TrTiTTn^-nnFrFisrEiJST- ft 7'/-fr^;.7jLi_&_i_£^_^s: g 16 I/We claim: 1. A wheel assembly (200, 300) for a motor vehicle (100), said wheel assembly (200, 300) comprising: a core member (210); an outer peripheral member (215) disposed concentrically and radially outward of said core member (210); and plurality of arms (220) connecting said outer peripheral member (215) to said core member (210), wherein said core member (210) having a closed circumferential profile is capable of detachably-supporting a central member (235), said wheel assembly (200) being rotatably connected to said motor vehicle (100) through said central member (235), and said core member (210) includes plurality of engagement portion(s) (EP), wherein an inward end of said plurality of arms (220) are connected to said core member (210) at said engagement portion(s) (EP) and said central member (235) is secured to said core member (210) at said engagement portion(s) (EP). 2. The wheel assembly (200) as claimed in claim 1, wherein said core member (210) is provided with a first-radial boss (210B) and said central member (235) is provided with a second-radial boss (235B), wherein said first-radial boss (210B) of said core member (210) forms at least a portion of said engagement portion (EP). 3. The wheel assembly (200) as claimed in claim 2, wherein said second-radial boss (235B) of said central member (235) abuts at least a portion of said first-radial boss (210B) of said core member (210) in axial direction thereof, and said central member (235) is secured to said core member (210) through said radial bosses (210B.235B). 4. The wheel assembly (200) as claimed in claim 2, wherein said first-radial boss (210B) is having a tapered profile in a direction radially outward of said wheel assembly (200) and each arm of said plurality of arms (220) being connected at said tapered end portion respectively. FIT. F" FHF MMTH ITT"?:WT' 2 Q 1 3 YS^~3 8 17 5. The wheel assembly (200) as claimed in claim 1 or 4, wherein said central member (235) is secured to said core member (210) through one or more fasteners (240), said one or more fasteners (240) capable of engaging with a rotation-locking portion (245) provided on said core member (210), wherein said rotation-lock 5 portion (245) restricts angular rotation of said bolt (240B). 6. The wheel assembly (200) as claimed in claim 5, wherein said rotation-locking portion (245) includes at least one side capable of engagingly abutting with said one or more fasteners (240), and wherein said one or more fastener(s) includes a bolt (240B), and a bolt head (240BH) of said bolt (240B) is capable of engagingly 10 abutting with said rotation-locking portion (245). 7. The wheel assembly (200) as claimed in claim 1, wherein said core member (210) has a first width (Wl) and said central member (235) includes a second width (W2), said second width (W2) is substantially greater than said first width (Wl), and said central member (235) includes an intermediate portion (260) axially 15 sandwiched between an axial-securing portion (255) and a heat sink portion (265). fl) 8. The wheel assembly (200) as claimed in claim 7, wherein said axial-securing JJ* portion (255) includes said second-radial boss (235B) and said axial-securing Q) portion (255) abuts one axial side face of said core member (210), said heat sink P portion (265) extends axially outward at other axial side of said core member E o CN 20 (210), and said intermediate portion (260) is at least partially annularly enclosed by said core member (210). lO to js«. a vertex (TV) and a base (TB), wherein said vertex (TV) coincides with said o O 25 tapered end. ^ 10. The wheel assembly (200) as claimed in claim 2 or 9, wherein said 9. The wheel assembly (200) as claimed in claim 2, wherein said first-radial boss (210B) and said second-radial boss (235B) includes a triangular profile (T) having O CN second-radial boss (235B) is provided with one or more scooped portion(s) (250) -^ in proximity to said base portion (TB). [^ 11. The wheel assembly (200) as claimed in claim 7, wherein said heat sink CO o T- 30 portion (265) includes plurality of heat dissipating portions (270) disposed at least -ICLE^X^EEIX^^KBmsz^ETjaxxXM^t^^s, on an outer periphery extending radially outward thereof. g 18 12. wheel assembly (200) as claimed in claim 1, wherein said central member (235) is capable of accommodating a brake drum assembly (230). 13. The wheel assembly (200) as claimed in claim 7, wherein said central member (235) is capable of accommodating a brake drum assembly (230) disposed towards 5 said heat sink portion (265) or a disc member (310) of a disc brake assembly mounted to said heat sink portion (265) providing improved heat dissipation. 14. The wheel assembly (200) as claimed in claim 7, wherein a driven sprocket (205) is functionally connected to said central member (235) at said axial-securing portion (255), wherein said axial-securing portion (255) is provided with one or 10 more partitions (235P) for accommodating a damper. 15. The wheel assembly (200) as claimed in claim 1, wherein said core member (210), said outer peripheral member (215), and said plurality of arms (220) are integrally formed by casting, and said central member (235) is an independent casted member. 15 16. The wheel assembly (200) as claimed in claim 1, wherein said core member O (210), said outer peripheral member (215), and said plurality of arms (220) are £1 independently formed by casting.