Spitfire Formula Four Lock-Ins 55mm 99D Wheels Size_8.5 a wheel's reputation has been

a wheel's reputation has been a combination of market hype

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At the heart of Ace's design is a patent pending technology providing a more stable anchor point for the kingpin

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Spitfire Formula Four Lock-Ins 55mm 99D Wheels Size_8.5 a wheel's reputation has beenOverview 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 side 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. Surface Smooth Quantity Set of 4 Wheels Wheel Profile Medium Key Features Formula Four Urethane Wheel Shape Lock