BOTRAK car wheel spacers and wheel adapters are always engineered from the true forged alloy aluminum 6061 or 7075 standard T6 treated to ensure the items' tensile strength, and precisely CNC to the closest tolerance for perfect fitment. Various types/designs and thickness/width options applicable to various car makes, trucks and SUVs, ATVs & UTVs, for the purposes of installation of wider wheels & tires while preventing rubbing, more track-width for increased cornering stability, upgrade of the calipers, bolt pattern conversion and etc.