Royal Scooters 71110 Knight Freestyle Stunt Scooter, Black/Gold 6061-T6 post heat treated aluminum deck is royals' strongest to date Heat treated oversized Cr-Mo bars - w:520mm H:590mm(with SCS) - stronger, taller, lighter, and wider Super high Rebound 88A PU cast wheels with spoked aluminum Cores Fast and precise chrome steel ABEC 5 bearings (Note: ABEC ratings above 5 don't improve speed) Comfortable ribbed grips