Designed to conquer technical singletrack while striking the ideal balance of weight, durability, and value, the Hydra2 Trail 6-Bolt Rear Wheel is ready for all-day adventures. Its alloy rim, featuring a wide, hollow bead wall, guards against pinch flats, and Hydra2’s near-instant engagement gives you a quick burst out of corners and up climbs. With i9's rugged straight-pull aluminum spokes, this wheel is a no-compromise choice, built to handle long hours in the saddle without fail. Industry Nine Hydra 2 Trail Features A 65% thicker axle that’s been redesigned to dissipate stress more effectively Larger 6903 bearings throughout , and a new labyrinth channel and full-contact radial lip seal to keep out elements that cause premature bearing wear Quicker 0.41° engagement and 60% less coasting drag than its predecessor A new, foolproof design to ensure consistent bearing preload, regardless of variations in axle tightness Larger, 5.5mm pawl pockets that distribute force 26% better, preventing deformation of the pockets over years of use Tougher metal for the drive ring and an extra tooth on each pawl, guaranteeing Hydra2 can easily handle the torque of the most powerful e-bike motors Industry Nine Trail Specs Rear Wheel Hub Rim Spoke Parts/Upgrades Industry Nine Trail Rear Wheel Model: Industry Nine Hydra2 Trail Built For: Singletrack Seekers and Trail Tamers Position: Rear Warranty: 2 Years ( Click here for details ) Weight: 910 grams (29") Weight Limit: 250lbs or 113kg max Wheel is shipped tubeless-ready and includes the rim tape and valve installed. I9 Hydra 2 Hub Model: Industry Nine Hydra2 Rotor Mount: 6-Bolt Holes: 32 hole Points of Engagement: 870 POE Drive Ring: 145 tooth Pawls: 6 Engagement: .41 degrees Bearing: Enduro Material: Aluminum I9 Trail 285 Rim Model: Industry Nine Trail 285 Tire Width: 2.20" - 2.50" Inner Rim Width: 28.5mm Outer Rim Width: 36mm Valve: 40mm Presta (color matched to hub) Material: Aluminum Rim Tape: Included & Installed Tubeless Ready: Yes Rim Weight: 455 grams (29") Industry Nine Alloy Spoke Model: i9 Proprietary Alloy Spoke Shape: Straight-Pull Material: Machined Aluminum Nipple: i9 Integrated, Aluminum Spoke count: 32 Hydra 2 Ceramic Upgrades Freehub: Ceramic Freehub Kit Bearings: Ceramic Bearing Kit Hydra 2 Trail Replacement Parts Rim: Trail 285 Rim Freehub: Complete Freehub Kit Bearing: Hub Bearing Kit Bearing Tool Kit: Bearing Tool Kit Front Axle: Front Hub Axle Rear Axle: Rear Hub Axle Front EndCaps: Front EndCaps Rear EndCaps: Rear EndCaps Pawl: Freehub Pawl Pawl Spring: Freehub Pawl Spring Tubeless Valves: Tubeless Valves Industry Nine Freehub Compatibility The cassette that you plan to mount to your rear Industry Nine hub determines the freehub type you need. Below is a quick guide for the most common cassette types. Please contact us before you order if you have any questions about compatibility with your bike. Cassette Type: I9 Freehub: Shimano 12-speed Micro Spline (MS) Shimano 7 to 11-speed HG SRAM GX, X01, XX1, Eagle + SRAM "XG-" Cassettes XD SRAM NX + all other SRAM "PG-" Cassettes HG Single Speed Cogs (use with spacer kit, not included) HG