5x5.5 (139.7) to 5x4.5 (114.3) / 87.1mm US Wheel Adapters 19mm Thick 1/2" Studs x 4 BUICK Part # = USA-5112-5100A9-57

Part #  =  USA-5112-5100A9-57

Radius seat lug bolts are Not compatible with these adapters that require a conical seat they Must be replaced with a conical seat fastener or failure can occur

Adapter Center Bore  =  78

Part #  =  USA-5550/5135-5135B50-87

1 to 5x100 wheel lip 57

5x5.5 (139.7) to 5x4.5 (114.3) / 87.1mm US Wheel Adapters 19mm Thick 1/2" Studs x 4 BUICK Part # = USA-5112-5100A9-575x5. 5 5x139. 7 to 5x4. 5 5x114. 3 US Wheel Adapters 19mm Thick 1 2" Studs x 4 5x5. 5 5x139. 7 to 5x4. 5 5x114. 3 US Wheel Adapters 19mm Thick 1 2" Studs x 4 NOTICE!! This is a built to order item listed as No Return. Disregard any mention of return later in this listing. If you buy the wrong item for whatever reason, you wreck your car, your wheels get stolen, someone told you the wrong measurement, bought 2 thinking it was 4, found a better price