THese are the new amazing X Bones all terrain that are only 97A but they slide like 99 & 101 A's with less flat spotting than traditional STF's.
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.
These are the Hypno Therapy 55 mm V5 sidecut profile.