Give your vehicle a wider track width and increased stability with Rough Country's Aluminum Wheel Spacers. These ultra-durable spacers are constructed from 6061 aluminum for a long lifespan of heavy-duty performance. Rough Country's 1.5-Inch Wheel Spacers are designed for GM models using a 6x5.5 bolt pattern.Spaces wheel 1.5" allowing use of wider tires. Made from 6061-T6 Aluminum. Spacers are corrosion resistant. Studs are preinstalled.Fits 6 x 5.5" bolt pattern. Sold in pairs.1 hourhttps://s3.amazonaws.com/roughcountry/install/92110100.pdf1977-1987:2WD:Chevy:C10/K10 Pickup;1977-1987:4WD:Chevy:C10/K10 Pickup;1977-1987:2WD:GMC:C15/K15 Pickup;1977-1987:4WD:GMC:C15/K15 Pickup