The 1ZERO HITOP S wheelset melds high value with high performance for a better and faster ride. The 1ZERO HITOP S carbon rim complies with the terrain thanks to Zipps proprietary HITOP Technology. The result is a light XC race or adventure wheel that carries speed through all sections of the trail, rocks, roots, and rutswith the durability required for a trail bike with up to 130mm of travel.* The winged rim top provides a smooth resting surface for the tire, reducing the chanceof pinch flats after a rock hit* ZM 900 hub with 52 points of engagement for fast acceleration* TyreWiz tire-pressure monitoring system sold separately* Lifetime warranty