Pig Head Proline Skateboard Wheels 53mm - Green

Medium - Your classic wheel shape, versatile all-around wheel for street/park skating.

Treaded - Treaded wheels come with tiny grooves on the riding surface that wear away quickly.

101a - Most common durometer offering a good balance between speed and grip. Meant for skateparks and other smooth surfaces.

(yes, they come in a set of four. It'd be weird if they didn't, right? I hope you're not buying wheels one at a time.)