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. The #1 wheel shape in skateboarding. Medium width riding surface with round sidewalls. Designed for control in all situations.

Specs:

• 52mm
• 101a durometer
• Formula Four urethane
• Classic shape