Industry Nine Hydra2 DH S
Full power downhill reliability
Specifications
- Wheel Size
- 27.5" / 29"
- Rim Inner Width
- 31mm
- Weight
- 2165g (29")
- Axle
- Front: 20x110mm Boost, Rear: 12x157mm Super Boost
Overview
The Hydra2 DH S is built for the most abusive DH tracks and full-power e-bikes. Featuring the new Hydra2 hub with 870 P.O.E. and a robust 31mm alloy rim with Hollow Bead Wall technology. The "S" chassis uses J-bend steel spokes for easy serviceability and bombproof durability.
Features
Hydra2 Hubs with 870 P.O.E. (.41° engagement)
Steel J-bend spokes
31mm internal rim width
Hollow Bead Wall for impact resistance
E-Bike Approved (Class 1 Full Power)
60% less coasting drag than original Hydra
Guides for setup
All guidesWheel Maintenance
Truing, spoke tension management, and hub service — keep your wheelset race-ready and fatigue-free.
Component Compatibility
Avoid expensive fit mistakes between forks, wheels, tires, and cockpit parts before you buy.
Tire Selection & Setup
Choosing the right tread, compound, and pressure for your terrain.
Tubeless Maintenance
Keeping your tubeless setup reliable and performing
Tire Inserts
When inserts help, what they cost in weight and feel, and how to choose the right level of support.
How we evaluate this component
Product cards, analysis notes, and setup guidance are grounded in public specifications, market positioning, compatibility, and the most likely real-world use cases on trail.
Read the full methodology