The Formula Four Classic wheels from Spitfire feature a conical wheel shape and come in a 99a, 100% urethane construction with a yellow and black spiral design on the side.
PRODUCT FEATURES
Diameter: 55mm Durometer: 99a
Formula Four urethane
Conical wheel shape and hard polyurethane core for a true bearing seating and speed.
Unmatched flat spot resistance.
Made in the USA.