Spitfire Lock Ins are asymmetrical in shape, featuring a conical cut profile opposite a flat edge on the inside of the wheel for maximum lock when grinding.

101a Duro, for a harder, faster ride. Proven formula four performance made in Spitfire's
hardest duro for extra speed and slide.

Spitfire Formula Fours were developed to combine all the desired properties of a performance skateboarding wheel without sacrificing any one attribute at the expense of another.

The Formula Four Performance Urethane comes not from a single benefit, but from a combination of qualities and features that together produce a truly great wheel.

An unmatched abrasion resistant wheel, meaning fewer flat spots and a longer lasting wheel that holds size and shape longer.

Spitfires are top of their class. One of, if not THE best skateboard wheel out there.