Bones X-formula Wheels 54mm Hardness 99A v5 Sidecut

Diameter: 54mm
Hardness: 99A
X-Formula
V5 Sidecut
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 just like harder wheels do. X-Formula wheels are produced in two hardnesses 97A and 99A also known as X97 and X99.