Spitfire - Formula 4 Conical 52mm 99a bones Classic black finish with Diamond

Classic black finish with Diamond Vision styling makes it easy to mix with any outerwear

Formula Four Urethane - Unmatched abrasion resistance for fewer flat spots

versatile silhouette that layers beneath jackets or over hoodies without adding bulk or stiffness

and athleisure ensembles

Spitfire - Formula 4 Conical 52mm 99a bones Classic black finish with DiamondKey Features Formula Four Urethane Unmatched abrasion resistance for fewer flat spots. More controllable grip. Lasting speed no matter the terrain. Smooth anti slick slide and a longer lasting size and shape. Wide profile More traction and stability at high speed so you'll be less likely to slip out of your line.