| 摘要 |
A hub unit for vehicle according to the invention includes a flange formed with plural bolt-hole groups each of which includes plural bolt holes each having a female thread of the same nominal diameter formed in its inside surface and each of which has a hole-pattern of the bolt holes circumferentially arranged on the same pitch circle diameter with equal spacing. The plural bolt-hole groups are mutually different in at least either one of the nominal female-thread diameter and the pitch circle diameter R, so that plural types of components having different hole-patterns may be directly mounted to the flange without using an adaptor as an independent member. This leads to cost reduction.
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