SPITFIRE FORMULA 4 LOCK-INS WHEELS roller skates X-Formula rolls over rough terrain

X-Formula rolls over rough terrain like softer wheels do

Built from Cold Rolled Steel

0 and our Blackriver Pro Fingerboard Tool

Part of the 'Grosso Forever' collection celebrating the life and style of Jeff Grosso

Collab logo lockup woven neck label

SPITFIRE FORMULA 4 LOCK-INS WHEELS roller skates X-Formula rolls over rough terrainFormula Four Urethane: Experience the gold standard of skateboard urethane. Spitfire's exclusive F4 compound offers exceptional abrasion resistance, virtually eliminating flat spots, and provides a consistently smooth, fast ride, session after session. 99a Durometer: This is the sweet spot for a versatile ride. The 99a durometer ensures excellent grip on various surfaces while still allowing for controlled slides. It's the perfect balance for