Pig Head Proline Skateboard Wheels 53mm - GreenRegular price $43.00
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.)