When one tries the Zipp 1ZERO HITOP SW MTB wheelset, they quickly realize its potential in boosting speed. Recognizing the growing challenges in modern cross-country races, there's an understanding that mere stiffness in an XC wheelset doesn't cut it. Instead, the ideal wheelset should exude vitality. The 1ZERO HITOP SW's carbon rim, built with Zipp's unique HITOP Technology for carbon layup, harmonizes with the terrain. This creation leads to a feather-light XC wheel that gracefully navigates through every trail twist-be it rocks, roots, or ruts-while being durable enough to support a trail bike with up to 130mm of travel. Such a compliant wheel naturally bolsters confidence. Riders will find that they neither need to exert excessive force to achieve optimal speeds nor wrestle with their bike in challenging terrains. Additionally, the 1ZERO HITOP SW boasts the TyreWiz tire-pressure monitoring system, ensuring that tire pressure is always optimized. With the ZM2 SL hubset, which is among the market's lightest, riders will experience swift accelerations and reduced lag post-cornering with the 1ZERO HITOP SW. Carbon 24H Hookless rim, compatible with Tube-type or Tubeless tiresHITOP Technology produces proprietary rim layup to provide compliance and confidence when the trail gets roughLow weight for effortless accelerations and climbingWinged rim provides a smooth resting surface for the tire, reducing the chance of pinch flats after a rock hitTyreWiz 2.0 tire-pressure monitoring system includedSapim CX Ray spokes laced to the ZM2 SL hub with XD Driver and 66 points of engagementLifetime WarrantyItem SpecificationsCassette Body TypeSRAM XD 11/12 SpeedColorCarbonDefined ColorCarbonHub/Brake CompatibilityCenter-Lock DiscISO Diameter622 / Road / 29"Rear Axle12mm Thru x 148mmRim MaterialCarbonRim Width (Internal)30Tire TypeTubeless Ready ClincherValvePrestaWheel Size29" Zipp 1Zero HiTop SW Rear Wheel Rear Wheel UPC: 710845898211