OG CLASSIC:Spitfire's Original Cut-Away Shape. Features a wider riding surface shape,lightened with cutaway side walls.
Wheel Specs:
Size: 52mm
Hardness:99d
Width: 31.1mm
Riding Surface: 21.4mm
99a Durometer–More speed and control on all surfaces. Unmatched flatspot resistance. Smooth, anti-stick ride. High-rebound compound.
Formula Four Urethane–Formula Four urethane is unlike any other. Unbeatable lasting performance Spitfire urethane. Fast as hell. Long lasting, abrasion resistance, smooth anti-slick slide with a controllable grip, guaranteed*.
Both in the streets and under high-speed stress tests in Spitfire's lab, Formula Four wheels retained more material, coned less and kept their original shapes and sizes longer than any other wheel.
High Rebound Compound
| SIZE | WIDTH | RIDING SURFACE |
| 51MM | 31.1MM | 21.2MM |
| 52MM | 31.1MM | 21.4MM |
| 53MM | 31.7MM | 21.8MM |
| 54MM | 32.3MM | 22.2MM |
| 55MM | 33MM | 22.6MM |
| 56MM | 33.6MM | 23.1MM |
| 58MM | 34.8MM | 23.9MM |
| 60MM | 36MM | 24.7MM |
