4 PC 1999-2016 Chevy GMC Cadillac 6x5.5 Black Hub Centric 1.25" Wheel Adapters Spacers 14x1.5 Thread Pitch Fits Silverado SS 1500 Tahoe Avalanche Sierra Yukon Escalade 4 New Black Hub Centric Wheel Adapters Bolt Pattern: 6x5.5". Hub Bore: 78.1. Spacer Thickness: 1.25 inches. Stud/Nut Thread Pitch: 14x1.5 These will not vibrate and are specifically designed for the following Chevy/Gmc Trucks/Suv's: Silverado / Sierra 1500 Tahoe / Yukon Suburban Avalanche Escalade All Years The correct OEM way to add adapters to your truck Designed to move the wheels further out from the hub, giving your vehicle a more aggressive stance & allows for better handling characteristics Complete bolt-on. Comes with necessary hardware. 2 Yr Warranty