Specification - PCD:8x165.1(8x6.5") 8x170 8x180mm, Hub Bore: 127mm, Thickness: 1/2"(12mm), Thread Pitch: 10x1.25, Quality: 2pcs. Universal Fitment - 1988-2019 F-250, 1988-1997 1999-2004 F350, 1994-2010 Ram 2500 3500, 2011-2019 Ram 2500 3500, 2002-2006 Avalanche 2500, 1992-1999 C2500 K2500 Suburban, 1988-2004 C3500, 1996-2019 Express 3500, 1988-2000 K3500, 2001-2006 Silverado 1500 HD, 1999-2019 Silverado 2500/2500HD, 2001-2010 Silverado 3500, 2000-2013 Suburban 2500, 2007-2019 Savana 2500, 1996-2019 Savana 3500, 1999-2019 Sierra 2500HD 3500HD, 1992-2006 Suburban 2500 Quality - The 8x170 wheel adapters are 6061-T6 aluminum billet, CNC machined anodized wheel spacer provides additional resistance to corrosion. You can rest assured you are getting the highest quality of wheel spacers that is tough, stable and safe. Benefits - Allows extra clearance between the wheel and the wheel hub assembly increasing the offset which allows for larger tire installation to the vehicle. Installing the wheel adapters can fix brake caliper clearance issues, correct tire friction issues, increase cornering stability, give your vehicle a more aggressive stance Warranty - If the product has any quality problem, you can contact us at any time, We will reply you within 24 hours, making every of our customer get right good products is our mission - We know that we still have room for improvement, so when you are not satisfied with our products, we sincerely hope you could leave us a message, give us a chance to improve,thank you. (with Installation Instruction and Pro Shock-Proof Box) Universal Fitment - 1988-2019 F-250, 1988-1997 1999-2004 F350, 1994-2010 Ram 2500 3500, 2011-2019 Ram 2500 3500, 2002-2006 Avalanche 2500, 1992-1999 C2500 K2500 Suburban, 1988-2004 C3500, 1996-2019 Express 3500, 1988-2000 K3500, 2001-2006 Silverado 1500 HD, 1999-2019 Silverado 2500/2500HD, 2001-2010 Silverado 3500, 2000-2013 Suburban 2500, 2007-2019 Savana 2500, 1996-2019 Savana 3500, 1999-2019 Sierra 2500HD 3500HD, 1992-2006 Suburban 2500 Quality - The 8x170 wheel adapters are 6061-T6 aluminum billet, CNC machined anodized wheel spacer provides additional resistance to corrosion. You can rest assured you are getting the highest quality of wheel spacers that is tough, stable and safe. Benefits - Allows extra clearance between the wheel and the wheel hub assembly increasing the offset which allows for larger tire installation to the vehicle. Installing the wheel adapters can fix brake caliper clearance issues, correct tire friction issues, increase cornering stability, give your vehicle a more aggressive stance Warranty - If you are not sure whether the wheel spacers matches your vehicle or have any other questions, feel free to contact us. We also provide product lifetime warranty.