Fast efficient and lightweight for long rides through mountain backroads but still tough and durable for big days across relentless gravel as well as fast rips on technical dirt; the all-new go-anywhere CXR 1 represents the evolution of versatile performance. Optimized carbon lay-up places high-tensile strength carbon fiber at the most crucial points ensuring a robust structure at a class-leading weight Giant hookless technology further enhances the rim’s durability with a more consistent carbon fiber structure creating XC-level impact resistance and a rounder tire shape for better grip and handling as well as added sidewall support when cornering 25mm inner rim width is apt for larger volume road and gravel tires Dynamic Balanced Lacing technology ensures spokes are set for optimal tension when pedaling resulting in enhanced durability and transmission efficiency creating a stiffer more efficient wheel that winds up fast and carries more speed 54 tooth DT 350 hub offers near-instant engagement for quick power on technical climbs Since its first incarnation on our cyclocross bikes back in 2014 the CXR 1 has accompanied riders as they took their 'cross and road bikes farther and faster across more demanding terrain right into the whole new discipline of gravel riding and racing. Now what began life in the mud and grime of the CX course has evolved into the next generation of all-purpose wheel combining class-leading weight and stiffness for on-road performance with maximum strength and durability for gravel and dirt. Rim Material: Carbon Rim Type: Hookless Clincher Tubeless: Giant Tubeless System rim tape and valve kit included Rim Height: 35mm Rim Outer Width: 31mm Rim Inner Width: 25mm ETRTO: 622-25 Front Hub: DT350 Centerlock Rear Hub:  DT350 54t ratchet system Centerlock Hub Compatibility: Shimano HG SRAM XDR Bearing: Sealed Cartridge Front Axle: 100x12 Thru Axle Rear Axle: 142x12 Thru Axle Spokes Front: SAPIM CX-Ray Lacing Front: 24H DBL Spokes Rear: SAPIM CX-Ray Lacing Rear: 24H DBL Nipple Type: Alloy black Warranty: 2 years Weight Pair: 1398g