The F4 Lock Ins Wheels from Spitfire feature Formula Four urethane making for a fast and smooth wheel with lasting performance. These high quality skateboard wheels feature a 99 Duro hardness which are best for street & park skating. An asymmetrical shape and design with a conical cut profile on one side and a straight edge "lock-in" cut on the other helps lock into grinds.

• (F4) Formula Four Urethane
• Asymmetrical shape and design
• "Lock-Ins" help to stay locked into grinds
• Hardness: 99 DURO
• Longer lasting speed and control
• 100% true performance urethane
• Set of four wheels
• 53mm in size
• Natural white wheels with colored graphics

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