From Spitfire, the Formula Four Lock In skateboard wheels measure in at 53mm with a 99a durometer rating. The signature Lock In shape offers reduced hang ups on grinds and slides thanks to their thinner contact patch and predictable edge shape, while the
From Spitfire, the Formula Four Lock In skateboard wheels measure in at 53mm with a 99a durometer rating. The signature Lock In shape offers reduced hang ups on grinds and slides thanks to their thinner contact patch and predictable edge shape, while the
