F4 101D Conical Full Skateboard Wheels

Spitfire Duro 101 – The Duro 101 by Spitfire is harder of the two durometers, they will be faster in a skatepark than the 99Duro wheels, but are also more slippery. They will last longer because of a harder Durometer but not be as smooth in the streets as a 99D.

Formula Four Urethane – Unmatched abrasion resistance (no flat spots), more controllable grip, lasting speed everywhere, smooth anti-stick slide, longer lasting (holds size and shape longer).

Conical Full Shape – With a wide riding surface and a cutaway design, this shape has unmatched control and lasting speed everywhere.