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.
Conical Full Shape - Wider riding surface and cutaway design for unmatched control and lasting speed.