What is a wheel adapter?

 A wheel adapter is used when installing a wheel  that has a different bolt pattern than the vehicle.  Adapters are commonly used to change the bolt pattern in order to properly fit wheels from one vehicle to the hub of a different vehicle.  eg  “6×5″ to 6×5.5″”  or  “14×1.5 Studs to 9/16 Studs”.  They can also be used to properly fit aftermarket wheels.  Like spacers, adapters are available in hub centric and lug centric designs.