Spitfire Formula Four Lock-Ins

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Grind confidently with the Spitfire Formula Four Lock-Ins Skateboard Wheels. The Spitfire Lock-In shape features a familiar conical cut profile with a straight edge on the other si de in order to lock into grinds for reduced slipping. Poured with Formula Four Urethane in a medium profile with a smooth surface. Sold as a set of four in multiple sizes and durometers. Show more