Medium - Your classic wheel shape, versatile all-around wheel for street/park skating.
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.
Lock Ins Cut - Asymmetrically cut, you can get the benefits of conical outer walls while the inside wall is cut straight, giving you a flat surface to lock in your grinds.
99a - Offers more grip than harder wheels and more slide than softer wheels. Great for slick surfaces when you want more control.