The Industry Nine Hydra Classic rear hub is built entirely in-house at I9's Asheville, NC facility — shell, axle, endcaps, pawls, and driverings all produced on the same floor and anodised in their own lab. The result is 0.52° of engagement, exceptional light weight, and the confidence of knowing spare parts are always available.

  • 0.52° engagement for near-instant power transfer on technical climbs and sprints
  • Machined from 7075-T6 aluminium bar stock for outstanding stiffness-to-weight
  • A2 tool steel pawls and driverings wire EDM-cut for precise, durable engagement
  • 32-hole drilling suits most trail and enduro rear wheel builds
  • Boost 12x148mm axle for maximum frame and dropout compatibility
  • 6-bolt (ISO) disc rotor mount
  • E-bike Class 1 compatible

Every Hydra hub can be serviced without proprietary tools, and I9's range of freehub bodies, axle end-caps, and bearing kits means you can keep this hub running indefinitely. The in-house anodisation means colours are consistent and durable, with no outsourced finishing compromising the finish quality.

Fits 12x148mm Boost rear dropouts. 6-bolt (ISO) disc mount. E-bike Class 1 compatible. Available with multiple freehub body options to suit your drivetrain.

Warranty claims for this product should be directed to Tune Cycles. Return the item to us with proof of purchase and we will manage the warranty process with the brand on your behalf.
  • 0.52° engagement — among the fastest available, delivering immediate power pickup
  • 7075-T6 aluminium shell, axle, and endcaps machined entirely in-house in Asheville, NC
  • A2 tool steel pawls and driverings precision-cut by wire EDM for reliable, long-lasting engagement
  • In-house anodisation for consistent, durable colour finish
  • Boost 12x148mm axle for a stiff, rattle-free rear end
  • E-bike Class 1 compatible — handles the additional torque loads of pedal-assist systems
  • Fully serviceable without proprietary tools
SpecificationValue
Axle Standard12mm Thru-Axle
OLD (Over Locknut Distance)148mm (Boost)
Spoke Holes32H
Disc Mount6-Bolt (ISO)
Shell Material7075-T6 Aluminium
Engagement0.52°
Weight286g
E-bike CompatibilityClass 1
PositionRear
SKU DSG-I9H2MAEX
Brand Industry Nine