Bones Wheels: 54mm 95a X-Formula Sidecut Slime Ball Wheels The Family Tree Collection –

The Family Tree Collection – Based on existing shapes

Built-in adjustable elastic waist belt for extreme comfort

medium-large coverage

it will fit tighter than it's true size

Bones Wheels: 54mm 95a X-Formula Sidecut Slime Ball Wheels The Family Tree Collection –About 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