Industry Nine Hydra 2 Grade 29" Wheelset The downhiller's secret weapon For riders who crave the fastest descents on earth, the Industry Nine Hydrat 2 Grade Wheel is their secret weapon. This wheel uses the new Hydra 2 Hub, a refined version of the legendary Hydra. This hub features an updated freehub system with 0. 41 degrees of engagement, optimized seals and bearing layout for 60% less coasting drag, and a scalloped hub flange for increased overall strength and reduced weight. The Grade Wheel features a premium alloy rim with a Hollow Bead Wall design and a proprietary profile for dent resistance, letting riders shrug off the biggest hits while resisting pinch flats. The direct-thread, straight-pull spokes reduce system flex, for near-telepathic control on the fastest descents available. Features Premium Alloy Rim uses a proprietary dent-resistant bead profile, sublimated graphics, and a tubeless-friendly bead shelf Industry Nine Hydra 2 Hubs offer the most refined, versatile pedaling platform I9 has created to-date, with 870 engagement points for 0. 41-degree engagement, and 60% less coasting drag than the V1 Hydra Direct thread straight pull spokes thread directly into the hub shell for less flex without compromising serviceability Downhill rated and e-bike approved (Full Power Class 1 e Bikes)Hollow Bead Wall increases rim impact resistance while reducing the risk of pinch flats on big hits SPECIFICATIONSWheel Size29"Rim Material Aluminum Inner Rim Width30mm Spoke Drilling32Valve Type Presta Tubeless Compatible Yes Tire Type Clincher, Tubeless Brake Compatibility6-Bolt Disc Intended Use Downhill, Freeride Wheelset Weight2045 grams | Industry Nine | Hydra 2 Grade 29" Wheelset 15X110 - 12X148 - Xd | Aluminum