【Benefits】These wheel adapters change bolt pattern, allow for installing 8 lug 170mm rims onto a 8 lug 165.1mm vehicle, designed to move the wheel further out from the hub, give your vehicle a more aggressive stance, allow for better handling characteristics & increases driving stability; Mount larger wheel or tires, eliminate wheel/tire rubbing instantly.【Features】VLAOSCHI wheel adapters are made from FORGED 6061 T6 aerospace aluminum, CNC precisely machined, undergoes anodizing process to prevent surface corrosion and rust, with pre-installed heat treated 10.9 grade carbon steel studs.【Applications】Adapt 8x170 Rims onto 8x6.5 Trucks, compatible with Chevy GMC 8 Lug vehicles: 1997-2021 Express 2500, 1997-2021 Express 3500, 1999-2010 Silverado 2500, 1999-2010 Silverado 3500, 1992-2013 Suburban 2500, 2002-2007 Avalanche 2500, 1997-2021 Savana 2500, 1997-2021 Savana 3500, 1999-2010 Sierra 2500, 1999-2010 Sierra 3500, 2000-2013 Yukon XL 2500, 2014-2021 R-A-M 2500, 2014-2021 R-A-M 3500, 2003-2010 H-ummer H2, 1988-2000 C2500 C3500 K2500 K3500(Only 8 Lug)【Specifications】Pack of 2 Black Forged Wheel Adapters. Thickness: 2" / 50mm | Vehicle Bolt Pattern: 8x6.5" / 8x165.1 | Wheel Bolt Pattern: 8x6.69" / 8x170 | Thread Pitch: M14x1.5 studs & nuts | Center Bore: 126.15mm.【Installation & Warranty】Easy bolt-on installation, no special tool needed. All VLAOSCHI products are covered by two years warranty to be free of defects in material and workmanship. Please note: recheck all bolts after 20-50 miles of driving, then again after 1-2000 miles. *If you don't make sure whether this item fits to you, message us with your vehicle year, maker and model, we will find the item you need.Compatible Vehicles1988-2000 C2500 C3500 K2500 K3500 Pickup (Only 8 Lug) 1997-2021 Express 2500 3500 2002-2006 Silverado 1500 HD 1999-2010 Silverado 2500 1999-2010 Silverado 3500 1992-2013 Suburban 2500 2002-2007 Avalanche 2500 1997-2021 Savana 2500 3500 1999-2010 Sierra HD 1500 2500 1999-2010 Sierra 3500 2000-2013 Yukon XL 2500Compatible with Ram 2500 2014-2021Compatible with Ram 3500 2014-2021Compatible with Hummer H2 2003-2010Important! Please verify the bolt count, bolt circle diameter, center bore, and bolt size match your vehicle before ordering.We recommend getting this kit installed by a trained professional, but it is not necessary.We don't recommend to install the bolt nuts by electronic tool, it is best by manual.