Bones Wheels: X-Formula V1 Standard 97a Size:53mm Extruded FH Speed Formula Base

Extruded FH Speed Formula Base - Durability

Auto Lever – Only one click to apply the right amount of pressure

Waterproof Breathable Valves – Moisture management through waterproof valves ensures breathability--meaning dry socks

Forged Aluminum Buckles – Hardened for ultimate strength

Dual Slide Strap Adjustment System

Bones Wheels: X-Formula V1 Standard 97a Size:53mm Extruded FH Speed Formula BaseAbout X Formula About: The amazing new X Formula (XF) is another industry leading innovation from the BONES WHEELS factory. X Formula rolls over rough terrain like softer wheels do, but slides much like a harder wheel will. Speed: X Formula is extremely fast because it has a super high rebound. X Formula rolls much smoother and faster on all terrains because it absorbs vibration and softens impacts much better than any other wheel in the market. Grip