These hangers are specifically designed for the Reverse King Pin Surf Rodz truck line. They offer adjustability, affordability and versatility to the riders, hanger features built-in speed rings, 3mm caster, and identical top/bottom bushing seats so the hanger may be flipped to tune the turning characteristics. Riders now have the ability to adjust the hanger widths utilizing our SZ Axle System. For even greater selection the hanger can now be replaced to achieve additional combination's (please see our website for details). Surf Rodz incorporates established manufacturing processes to ensure that the highest degree of quality is maintained with every part produced. They are manufactured from aircraft grade aluminum 6061-T6511 per AMS QQ-A-200/8. CNC machined billet aluminum hanger only.