Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.

Wide - More traction and stability at high speed so you'll be less likely to slip out of your line.

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.

Radial Shape - Round edge design for control, speed and a responsive slide.

90a - Best used for rougher terrain like craggy streets, ditches or gnarly pools.