Increases Wheel Track Width 1.5-Inch (38Mm) Hub-Centric Spacers Bolt Pattern 5 X 5.5-Inch (5 X 139.7Mm) To 5 X 5.5-Inch (5 X 139.7Mm) Designed To Work With Factory And Aftermarket Wheels Cnc-Machined Billet Aluminum Construction Increases Fender Clearance. If you're running stock size wheels with a wider set of tires you may encounter wheel rub. Installing a set of Mammoth 1.5 Inch Billet Pro 5-Lug Wheel Spacers will increase fender to wheel clearance to prevent this rubbing. As an added bonus Mammoth 1.5-inch Wheel Spacers will give your truck a wider track for a more rugged appearance.Hub Centric Design. Mammoth's Billet Aluminum Pro Wheel Spacers feature a Hub Centric design. This means that the center of the wheel spacer hub lines up exactly to the diameter of the axle hub giving you a perfect secure fit.Solid, Durable Construction. Mammoth precisely CNC-machines their Pro Wheel Spacers from a solid block of aircraft grade billet aluminum for superior strength and durability. These Wheel Spacers are then completed in a semi gloss black finish for great looks and long lasting corrosion protection.Application. These Mammoth 1.5 Inch Billet Pro 5-Lug Wheel Spacers are compatible with 2012-2018 truck models equipped with 5 lug 5 x 5.5-inch (5 x 139.7mm) factory or aftermarket wheels. Sold as a set of 2 Wheel Spacers.Please Note. (10) M14 x 1.50 Spacer Lug Nuts are included, but you will still be required to use your original lug nuts for installation.