Spitfire Formula Four Firebolt Bigheads 99a 53mm
The standard Classic skateboard wheel shape in 53mm. Offering protection for the axles and with a narrower running surface. 99a durometer is fast and smooth. Also allows for plenty of sliding.
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Spitfire Formula Fours are the most popular wheel urethane in skateboarding. They provide a smoother ride than their hardness suggests. They offer the perfect balance of slide and grip. Absolutely there when you need them to be. Formula Fours are very durable and resistant to flat spotting.