2 Pc 2011-2017 Silverado Sierra 3500HD Dually 8x210 MM Wheel Spacers Adapters 2" Thick 14x1.5 Thread Pitch FIts Dually Rear Wheels Only 4 Pc Brand New Silverado Sierra 3500HD 8x210 MM Wheel Adapters | Complete Bolt-On Kit Wheel Adapter Specifications: Color: Raw Aluminum | Thickness: 51 MM (2") | Bolt Pattern: 8x210 MM | Wheel Bolt Pattern: 8x210 MM | Center Bore: 155 MM | Thread Pitch: 14x1.5 | Material: Aerospace 6061 T6 Forged Aluminum The correct way to space out your wheels. Our spacers fit perfectly over your vehicles hub, which eliminates any possibility of vibrations at high speeds. Perfect for fixing clearance issues, for example; your wheels hitting shocks/struts or brake calipers Gives your vehicle an aggressive stance & allows for better handling characteristics. We have tested these adapters in aggressive offroad and have withstand every single time. We also carry 1", 1.5", 2", 2.5" & 3" Thickness. Made In The USA