Patent ID: 8066337

Claim:
A wheel supporting system comprising: a wheel hub which includes a hub shaft defining an inside hole therein and to which a wheel is to be attached; and a constant velocity joint which includes an outer ring including an outer ring shaft portion extended integrally from an end face of the outer ring, wherein the wheel hub and the constant velocity joint are coupled together by the outer ring shaft portion being fittingly inserted into the inside hole of the hub shaft, wherein internal splines and external splines are formed on an inner circumferential surface of the inside hole of the hub shaft and an outer circumferential surface of the outer ring shaft portion, respectively, in such a manner as to mesh with each other, wherein side face splines are formed on an end face of the hub shaft and an end face of the outer ring of the constant velocity joint, respectively, in such a manner as to mesh with each other, and wherein the wheel hub and the constant velocity joint are coupled together in such a manner that torque can be transmitted between the wheel hub and the constant velocity joint by the internal and external splines and the side face splines meshing with each other, respectively.