In Spitfire's labs and most importantly in the streets tested by Spitfire Team riders, Formula Four Performance Urethane lasted longer, withstood more abuse and performed superior to all other wheels. Spitfire Formula Four Urethane was developed to combine all the desired properties of a performance wheel without sacrificing any one attribute at the expense of another. Formula Four's True lasting Performance Urethane comes not from a single benefit, but from a combination of qualities and features that together produce a truly great wheel.
The Formula Four urethane is an unmatched abrasion resistant wheel, meaning fewer flat spots and a longer lasting wheel that holds size and shape longer.
Lock ins have an asymmetrical shape and design featuring the conical cut out profile on one side and a straight edge lock in on the other.
- 55mm / 99D
- Width: 39.2mm
- Ringing Surface: 26.8mm
- Lockin Full Shape
- Formula Four formula
- Set of 4 Wheels