| 摘要 |
The wheel rim of a vehicle wheel is fitted onto a cylindrical positioning portion 19 a, and in this condition, fixed to the hub 8 a using bolts which are threaded into the screw holes 11 a in the rotating flange 10 a, and tightened. As the hub 8 a rotates, the runout in the radial direction of the outer peripheral surface 20 a of the cylindrical positioning portion 19 a is controlled up to 15 mum, to suppress the runout of the vehicle wheel. With this construction, running performance such as riding comfort and diving stability is improved.
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