RockTrix for Precision European - 4pc 1.5" Thick Wheel Adapters Spacers 6x5.5 to 6x135 (CHANGES BOLT PATTERN) with 14x1.5 Fine Studs for many Cadillac Chevy GMC Trucks SUV (6x139.7 to 6x135) [CHANGES BOLT PATTERN] These Adapter Spacers will only work for you if your vehicle is 6x139.7 or 6x5.5 bolt pattern AND your wheels are 6x135 bolt pattern. See description for other important information. [APPLICATIONS] Cadillac, Chevy, Chevrolet, & GMC vehicles with 6x139.7 or 6x5.5 Bolt Pattern and 14x1.5 Threaded Studs [SPECIFICATIONS] Pack of 4. 1.5" (38mm) Thickness | 87.1mm Hub Bore | 14x1.5 Threaded Studs/Nuts [BOLT PATTERN INFORMATION] 6x139.7 or 6x5.5 Vehicle Bolt Pattern | 6x135 Wheel Bolt Pattern [MANUFACTURING] CNC Machined to exact specifications from Aerospace Billet Aluminum. Undergoes anodizing process to prevent corrision. Includes pre-installed heat treated 10.9 grade studs.