Spitfire Formula Four 99D Shadow Play Classic Skateboard Wheels Wheels Skatepark Formula™ (SPF) is very

Skatepark Formula™ (SPF) is very high quality urethane specifically formulated to resist flatspotting on slick or smooth surfaces while maintaining a higher rebound for a quicker response and a faster roll

Timeless in skateboarding - timeless in fingerboarding

Dramatically reduces axial and angular side impact damage and breakage

Durometers: 80a

Spitfire Formula Four 99D Shadow Play Classic Skateboard Wheels Wheels Skatepark Formula™ (SPF) is verySpitfire Formula Four Classics 99Duro Skateboard Wheels The #1 Shape in skateboarding worldwide, proven for speed and control. UNMATCHED FLATSPOT RESISTANCE SMOOTH ANTI STICK SLIDE HIGH REBOUND COMPOUND 100% TRUE PERFORMANCE URETHANE