In our 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.
Formula Four Performance Urethane is unlike any other. Both in the streets and under high-speed stress tests in our lab, Formula Four Wheels retained more material, coned less and kept their original shapes and sizes longer than any other wheel.
Formula Four Urethane is made using a 100% pure urethane compound. On the hills, in the streets & parks, and in forced flat spot testing in our lab, Formula Four wheels out-performed and resisted flat spots longer with less wear than all other wheels.
Formula Four's exclusive combination of High Rebound and Hard Duro produces a faster wheel everywhere. Higher rebound for faster speeds over rough and smooth surfaces. Hard Duro for a harder, faster ride that won't mush out over time.
Formula Four's exclusive anti-stick slide gives a fast/consistent, smooth slide all the way through. Slide with confidence start to finish knowing your wheels won't skip or catch mid-slide. Formula Four gives you the highest level of control and consistent grip you can count on.
Made in the USA
We back our products 100% and guarantee all Spitfire Wheels against any manufacturer defect. If you feel you'e received a set with a rare manufacturer defect please fill out and submit the information below to be put in contact with our warranties specialist for further information on how to send in your wheels for evaluation. If your wheels are determined to be defective we will send you a set of replacement wheels free of charge, no questions asked.
If your wheels are determined not to be defective you will have the option to have your wheels sent back to you or to purchase a new set of equal value at a discounted rate.
All Warranties will be addressed and replied to within 72 hours of being submitted.
Manufacturer determines validity of all defects.