Hub bore
The diameter of the central spigot the wheel centres on — must equal or exceed the wheel's centre bore.
Hub bore is the diameter of the central spigot on a vehicle's wheel hub. Every wheel has a matching centre bore in its rear face. The wheel's centre bore must be equal to or larger than the hub bore — if the wheel bore is smaller the wheel physically cannot seat.
If the wheel bore is larger than the hub bore the wheel is lug-centric: it centres on the lug studs rather than the hub. Lug-centric loading causes vibration at highway speeds and, over thousands of miles, fatigue in the studs. The fix is a hub-centric ring — a $5–15 plastic or aluminium ring that fills the gap and restores hub-centric loading.
Common hub bores in 4×4 fitment: 66.1 mm (Nissan), 78.1 mm (older GM), 93.1 mm (Chrysler), 106.1 mm (Toyota mid-size and TNGA-F platforms), 110.1 mm (Toyota full-size and Patrol Y61).
See also