(inner diameter) - fit vehicle hub 93.1mmO.D. When these match our hub ring description, they are the right size. Exceeds OEM standard in material, strength and hardness Gas Strut. Replaces New Holland OEM nos 84378453 Check the Centre Bore (CB) data of the wheel you have on hand. This can be found on the box label. If CB cannot be found on the box or back of the... 4pc 108 to 106 Aluminium Wheel Hub Centric Rings OD 108mm ID 106mm Thus any vibrations caused by the gap is eliminated. Technical Specification: I.D. Precision polycarbon hub centric rings Wheel Hub Ring Hubcentric Rings (Pack Of 4) - 93.1mm ID To 93.1mm Hub Centric Ring of the aftermarket wheel. Contact your wheel dealer if needed. This allows the wheel bore to engage fully with the vehicle hub with the help of hub centric rings. Hub Centric Ring And Its Purpose: Hub centric rings is plastic or metal piece that is inserted between the vehicle hub and the wheel center bore. (outer diameter) - fit rim bore 106mmSet contains - 4 hub centric rings Technical Note: To determine proper fitment you need to do a two things.