Spitfire - 99 Formula 4 OG Classics (55mm) Size:55mm Micro Groove Raceway Surfaces -

Micro Groove Raceway Surfaces - linear micro-groove surfaces improve bearing lubrication

Traction rubber outsole for better boardgrip

plus a molded PU sockliner for cushioning

ceramic balls will not rust

8 ceramic bearings

Spitfire - 99 Formula 4 OG Classics (55mm) Size:55mm Micro Groove Raceway Surfaces -Ride the fire and burn through the streets with the Spitfire OG Classic Wheels. A classic and reliable street wheel from your friends over at Spitfire. Manufactured with a wider riding surface and cutaway shape with a 99a durometer for the perfect blend of speed, grip and slide. Designed with classic Spitfire detailing on both sides of the wheel. Remember to keep the underground lit! Wheels sold in sets of four. 99a durometer Cutaway Shape Wider