Spitfire Formula Four Conical Full 101 Duro Skateboard Wheels 52mm Size:52mm Has a Performance Core construction

Has a Performance Core construction which are reliable

SickStick gum rubber outsole with the signature waffle tread for grip and board feel

Junior Edge Zip wetsuit boots

It has a 53mm wheel size and 99a durometer with street style shape

meaning they keep their shape longer

Spitfire Formula Four Conical Full 101 Duro Skateboard Wheels 52mm Size:52mm Has a Performance Core constructionSpitfire Formula Four Conical Full Shape 101a Hardness 52 mm More Speed Unmatched Flatspot Resistance Less coning Superior slide and Control Spitfire Formula Four skateboard wheels are some of, if not, the best wheels on the market. The urethane Spitfire have developed provides unmatched flatspot resistance, meaning they keep their shape longer, they don't cone, and will ride like new for longer than any other wheel Spitfire have made . Formula Fours