Unbeatable lasting performance — Spitfire's Formula Four urethane is fast as hell, long lasting, and abrasion resistant, with a smooth anti-stick slide and controllable grip. Guaranteed. Full riding surface without the weight. Symmetrical, cut-in sidewalls for speed, control, and slide when you need it.

Specs:

• 53mm
• 99a durometer
• Formula Four urethane
• Conical shape