Narrow - The least amount of traction intended for advanced, technical skateboarding.
Smooth - Smooth wheels have less surface friction than treaded wheels and are easier to slide.
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 Slim Shape - Thinner, lighter hand-cut round edge design for more control, speed and responsive slide.