Spitfire Lock-Ins Formula Four 99 A

Spitfire Formula Four Lock-Ins 99A skateboard wheels combine Formula Four urethane with the distinctive Lock-Ins shape, featuring an asymmetric profile that differentiates the inner and outer sides.

The straight inner edge provides a defined contact surface on curbs and rails. The outer side features a sculpted conical profile that creates the signature Lock-Ins geometry while reducing material where it is not needed.

The 99A hardness delivers a precise, controlled response. Formula Four urethane offers high resistance to abrasion and flatspots while maintaining consistent speed and performance, while the Anti-Stick Slide System supports smooth, controlled slides.

Available in multiple sizes, with diameter, width and contact patch varying according to the selected option; the asymmetric Lock-Ins shape, 99A hardness and Formula Four urethane remain unchanged. Choose your ideal size and enjoy proven Spitfire performance.

Technical Features

• Spitfire Formula Four urethane
• 99A hardness
• Asymmetric Lock-Ins shape
• Straight inner edge
• Sculpted conical outer profile
• Anti-Stick Slide System
• High abrasion resistance
• High flatspot resistance
• Set of 4 wheels