Spitfire Formula Four Conical Full Skateboard Wheels 101d 58mm rubber measure the circumference of your

measure the circumference of your head starting in the middle of your forehead and match it with the sizes below:

comfortable Lycra® sleeve

Lock-Ins Full: A wider version of a lock-in shape

Michelin Performance rubber outsole

Spitfire Formula Four Conical Full Skateboard Wheels 101d 58mm rubber measure the circumference of yourFormula Four Urethane: An unbeatable, lasting performance urethane. Fast, long lasting, abrasion resistance with a smooth anti slip slide and controllable grip. 101Duro: For a harder, faster ride. Proven Formula Four performance made in Spitfire's hardest duro for extra speed. Conical full: a wider version of the conical shape. Wide riding surface, cut in sidewalls to decrease weight. A solid, controllable shape for all terrains.