Sold in sets of 4 wheels. 
 
RollerBones Michelle Steilen aka Estrojen's signature park wheel. Check out this video to see Estro absolutely shredding the gnar on these babies. 
 
RollerBones Bowl Bombers are wheels for the skatepark and for street rollerskating. Fashioned after the Elite formula with a radius face for easier transitions. Great roll, great grip, and a great bark if you slide.
 
If you're looking for super high quality wheels, look no further, Bowl Bombers are it! They are made with a high quality polyurethane formula that gives you a bit of grip when you need and slide when you want it. No more flat spots and a lot more unlocked tricks!