Klock Werks design team has taken the guess work out of tire-hugging fender styles These fenders are thick enough to add rigidity to the front end by acting like a fork brace but can still be cut or shaped enough for an even more Kustom appearance Fenders are stamped steel, not spun, and E-coated for the ultimate smooth, long lasting fender All fenders come predrilled. Installation requires use of Klock Werks Tire Hugger Front Fender Mounting Blocks, 350-867 Chrome or 350-868 Raw are sold separately For 21" front wheels, this style measures 5.875" outside width and will fit the current 120/21 series tires on 3-1/2" wide rims