Hubcentric Wheel Spacers (4 Series). Details: HUBCENTRIC PARAMETERHubcentric Thickness:2″ or 38mm; Wheel Bolt Pattern: 6×5.5 ; Thread Pitch: 14×1.5; Inner Diameter: 78.1mm. Quantity: 4 pieces WHEEL SPACERS FITMENTCompatible for 1999-2019 Chevrolet Silverado 1500; 2001-2019 Chevrolet Tahoe; 2007-2013 Chevrolet Avalanche; 2000-2015 Chevrolet Suburban 1500; 2002-2006 Chevrolet Avalanche 1500, 1999-2019 Cadillac Escalade HUBCENTRIC FUNCTIONHubcentric Wheel Spacers Adapters give your vehicle a more aggressive appearance, improve handling, performance, and stability. Precision-machined 6061-T6 aircraft-grade aluminum billet with heat-treated and hardened 10.9-grade bolts pre-installed. Anodized surface for additional corrosion resistance. EASY INSTALLATIONTaper seat of the bottom makes spacers fit the hub perfectly, reducing vibration at high speed and installing Product information: Item Weight 5 pounds Package Dimensions 12.28 x 7.68 x 7.64 inches