Steel 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 All fenders come predrilled and are stamped, not spun, to ensure a consistent finish and minimize body work E-coated to prevent rust and corrosion 16", 17", 18" and 19" fenders measure 6.25" outside width and will accommodate up to a 130 series tire 21" styles measure 5.875" outside width and will fit the current 120/70-21 series tires on 3.5" wide rims 21" Narrow measure 4.5" outside width and will fit models listed with the stock narrow rim and a tire up to 100/100-21 Installation requires the use of Klockwerks Tire Hugger mounting blocks (sold seperately) Made in the U.S.A.