Spitfire Wheels - Formula Four Classic (97duro/ 53mm) theotis but our abrasion test chart

but our abrasion test chart shows why Bones is the best value

Formula Four's True lasting Performance Urethane comes not from a single benefit

Wheel Profile

we combined elements from them all to create this unique “Bill Tocco” approved original shape

Spitfire Wheels - Formula Four Classic (97duro/ 53mm) theotis but our abrasion test chartRide the fire through the streets with the newly introduced, Spitfire Formula 4 Classic 97a Wheels. Designed with your favorite classic Spitfire Classic wheel designs and manufactured with the quality high performance, Formula Four urethane. Formula Four Urethane lasts longer, withstands more abuse and performs superior to all other wheels. (53mm)