Spitfire F4 Lock Ins 55mm 99a Skateboard Wheels has an asymmetrical shape to offer you a different control while locking in those grinds. A conical cut on one side with a straight edge cut on the opposite built for precise lock in. You’ll leave the park Lit after a hard session on these bad boys!
Wheel Size – The 55mm size offers fast acceleration and a lower ride for quicker pops and maintaining good momentum on small transition and ramps. The smaller size is great for techy street shredders and smaller sized humans.
Bearing core – Center-Set so you can reverse the wheel to save the graphic and help get longer life out of your wheels as you can rotated them so they burn down evenly.
Wheel Shape / Profile: Lock Ins – Looking for the best of both worlds, then the newer shaped Lock Ins are for you. It’s an asymmetrical shape, meaning it has a different shape on each side. A flatter side for locking into edges and a chamfered side that won’t catch when sliding so you can lock in your 5-0 grind around the whole bowl!. For more info read Spitfire Wheel Shapes Explained
Urethane – Formula Four 99A: Spitfire released their new Formula Four wheels a few years ago now. The latest formula was designed for higher abrasion resistance. This means it is a little harder to flat spot. Formula Four 99A wheels are generally decorated with a blue themed graphic. Unless of course it is one of the signature wheels. The signature wheels feature artwork custom designed for each rider. 99A is considered a softer wheel in the modern skateboarding scene. They are still very hard. The 99A formula will provide a little more grip on super smooth surfaces and is a little more forgiving to ride on rougher surfaces.. For more info read Spitfire Wheel Formulas Explained