CZR i23 gravel wheels are designed to minimize weight while blending stiffness and compliance to maximize power transfer and increase comfort. CZR i23 rims feature a 24mm section depth to maximize energy transfer, reduce weight, improve vertical compliance, and reduce rider fatigue while a hooked bead also improves tire retention with high pressure adventure road and gravel tires.CZR i23 Carbon Rim with 3mm of asymmetrical spoke offset and reinforced spoke beds, TCS Tubeless compatibleFrequency Hub with top-tier EZO bearings28hole, 3-cross lacing with Aerodynamic Wing bladed spokes and Sapim alloy nipplesSwift 6-pawl freehub and 5 degrees of engagementSolid rim strip and TCS tape includedItem SpecificationsCassette Body TypeShimano HG 11/12-Speed RoadColorCarbonDefined ColorCarbonHub/Brake CompatibilityCenter-Lock DiscISO Diameter622 / Road / 29"Rear Axle10mm Thru x 142mmRim MaterialCarbonRim Width (Internal)23Tire TypeTubeless ReadyValvePrestaWheel Size700c WTB CZR i23 Rear Wheel Rear Wheel UPC: 714401452541