Spitfire Formula Four 99D White/Blue Conical Full Skateboard Wheels Size:52mm Absorbs 91% of impact energy

Absorbs 91% of impact energy in lab testing compared to 53% in other “performance” insoles (ASTM F 1614 -1999)

Simply place your stock insole onto the kingfoam elite insole and trim around the outside

Metal Diamond rivet on front

Lightest Wheel Available

screw on the lens

Spitfire Formula Four 99D White/Blue Conical Full Skateboard Wheels Size:52mm Absorbs 91% of impact energySpitfire Formula Four Conical Full 99Duro Skateboard Wheels have a wider riding surface and cutaway design for unmatched control and lasting speed everywhere. MORE SPEED AND CONTROL ON ALL SURFACES UNMATCHED FLATSPOT RESISTANCE SMOOTH ANTI STICK SLIDE HIGH REBOUND COMPOUND 100% TRUE PERFORMANCE URETHANE