ECCPP 2X 1" Wheel Spacers Adapters 5 lug 5x4.75 to 5x4.5 Fit for Chevy El Camino S10 Blazer GMC Sonoma Pontiac Firebird Phoenix with 12x1.5 Studs 5x4.75 to 5x4.5 WHEEL SPACERS FITMENTReplacement fit for 1979-1985 Buick Riviera 1979-1985 Cadillac Eldorado 1976-1980 Cadillac Seville 2003-2009 Cadillac XLR 1982-2003 Chevrolet Camaro 1984-2013 Chevrolet Corvette 1982-1987 Chevrolet El Camino 1982-2004 Chevrolet S10 1982-2004 Chevrolet S10 Blazer 1982-1991 GMC S15 1990-2005 GMC Jimmy 1990-2004 GMC Sonoma 1982-2002 Pontiac Firebird 1964-1987 Pontiac GTO 1980-1985 Pontiac Phoenix WHEEL SPACER 5 LUG PARAMETERThickness:1" or 25mm;Vehicle Bolt Pattern:5x4.75 or 5x120.65mm;Wheel Bolt Pattern:5x4.5 or 5x114.3mm;Thread Pinch:12x1.5;Inner Diameter:73mm WHEEL SPACERS 1 inch ADVANTAGEDesigned to move the wheels further out from the hub,giving your vehicle a more aggressive stance and allows for better handling characteristics.They also increase tire clearance,fix brake caliper clearance issues,allow installation of lift/lowering kits and wider, larger, or high traction tires. WHEEL SPACERS SAFETYMade from the best true T 6 billet aluminum,with heat treated and hardened 10.9 grade bolts pre installed. The anodized surface provides additional resistance to corrosion.Exceptionally sturdy and lightweight compared to steel spacer. 1 INCH WHEEL SPACERS 5X4.75 TO 5X4.5 NotePlease check the item whether fit for your vehicle from Compatibility Chart,if you don't make sure whether this item fits for yours,message us with your vehicle's Year/Make/Model