GR300 V2 Hydra 29in Boost Wheelset

What Our Gearhead® Experts Are Saying:

“For gravity riders or anyone on an E-mountain bike, the Grade 300 v2 hits a sweet spot—crazy-strong rims, direct-thread spokes, and the Hydra hub’s .52° engagement give it incredible precision. Even after repeated hard park laps, the rim stays true, and the ride feel stays consistent. It’s one of the best alloy builds for serious terrain.”

Engineered as Industry Nine’s burliest alloy option, the Hydra Grade 300 v2 29in wheelset brings end-stage durability and top-tier hub technology to riders tackling DH tracks, bike parks, and E-bike applications. The hollow bead wall design elevates alloy performance by widening the bead profile and eliminating concentrated impact points, dramatically improving rim resilience in high-force rock strikes and repeated square-edge hits. A triple cavity rim structure enhances structural stiffness and reduces deformation, keeping the wheel round and reliable under extreme loads.

Built on the 32h Hydra system hub and spoke platform, the wheelset leverages I9’s signature one-piece aluminum spokes and direct-thread hubshell for a fully integrated, flex-free interface. The Hydra freehub’s 690 points of engagement translate to instantaneous .52° pickup—crucial for technical maneuvers, slow-speed line corrections, and high-power eMTB torque inputs. This rapid engagement paired with the stiff spoke architecture makes the wheelset exceptionally responsive without compromising durability.

With a 30mm internal width optimized for 2.3–2.6in gravity tires, the Grade 300 v2 creates a stable footprint for aggressive cornering and improved sidewall support. The system is fully tubeless-ready, pairs with both DH and eMTB casings, and carries a rider-plus-gear max rating of 330lb for high-load riding environments. For riders demanding uncompromising strength, fast engagement, and a premium alloy feel, the Hydra Grade 300 v2 29in stands as a leading option for modern downhill and big-mountain setups.