Smooth - Smooth wheels come with a shiny coating on the riding surface that feels grippy at first, but wears away quickly.
Medium - Your classic wheel shape, versatile all-around wheel for street/park skating.
101a - Most common durometer offering a good balance between speed and grip. Meant for skateparks and other smooth surfaces.
95a - Great for beginners until they gain control needed for harder durometers. Also useful in your neighbor's beat up pool and gnarly ditches.
