Specification: Vehicle Bolt Pattern 8x6.5 (8x165.1mm). Wheel Bolt Pattern 8x180mm. Hub Bore: 117 mm. Thickness: 1.5 inch (38.1mm), Thread Pitch: 14x1.5 Threaded Studs. NOTE: ONLY WORKS with 8x180mm WHEELS on a 8x6.5"(8x165.1mm) Vehicle! NOT Fit 8x6.5"(8x165.1mm) WHEELS! Vehicle Compatible with 8x6.5 (8x165.1mm) PCD: For 1999-2010 Silverado 2500, 2001-2010 Silverado 2500HD, 2001-2010 Silverado 3500, 2007-2010 Silverado 3500HD, 2000-2013 Suburban 2500, 2002-2006 Avalanche 2500, 2000-2013 Yukon XL 2500.1999-2010 GMC Sierra 2500HD, 1999-2010 GMC Sierra 3500HD, 2000-2013 GMC Yukon XL 2500, 1996-2024 GMC Savana 2500 3500 (only fit 8lug) Wheel Compatible with 8x180mm PCD: 2011-2018 Silverado 2500, 2011-2025 Silverado 2500 HD, 2011-2025 Silverado 3500 HD (SRW), 2011-2024 Sierra 2500 HD, 2011-2024 Sierra 3500 HD (SRW) Grade 12.9 Stud: The tensile strength is up to 1000MPa, which is much higher than that of 10.9-grade studs, which will ensure better structural support and higher driving safety Strict Quality Assurance: The wheel spacer is made of 6061-T6 aluminum alloy, with anodized coating on the surface, and CNC automatic processing technology is used to ensure high precision and stability, strict quality control, improve vehicle handling and stability, and prevent roll Vehicle Compatible with 8x6.5 (8x165.1mm) PCD: For 1999-2010 Silverado 2500, 2001-2010 Silverado 2500HD, 2001-2010 Silverado 3500, 2007-2010 Silverado 3500HD, 2000-2013 Suburban 2500, 2002-2006 Avalanche 2500, 2000-2013 Yukon XL 2500.1999-2010 GMC Sierra 2500HD, 1999-2010 GMC Sierra 3500HD, 2000-2013 GMC Yukon XL 2500, 1996-2024 GMC Savana 2500 3500 (only fit 8lug) Wheel Compatible with 8x180mm PCD: 2011-2018 Silverado 2500, 2011-2025 Silverado 2500 HD, 2011-2025 Silverado 3500 HD (SRW), 2011-2024 Sierra 2500 HD, 2011-2024 Sierra 3500 HD (SRW)