Industry Nine Hydra Classic
Best high performance hub for aggressive downhill mountain biking.
This rear hub delivers near-instant power transfer with an industry-leading engagement system, making it a top choice for aggressive gravity riding. Its lightweight, serviceable design ensures reliability on the most demanding trails, while the precision engineering offers a responsive feel that riders can count on.
$470.00
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Who it's for
- Aggressive riders demanding instant power transfer and precise bike control.
- Downhill racers and aggressive trail riders seeking long-lasting, reliable components.
- Riders who appreciate premium component aesthetics and a unique auditory signature.
Who should skip it
- Budget-conscious riders or those not requiring top-tier performance.
- Riders preferring a quiet ride or less attention-grabbing components.
- Cyclists who prefer low-maintenance components or infrequent servicing.
Performance breakdown
Engagement speed
Near-instant power transfer makes technical climbs and cornering feel effortless.
Durability
Built to withstand the relentless abuse of aggressive gravity riding.
Weight efficiency
Impressively light profile without sacrificing the robust construction riders demand.
Maintenance accessibility
Straightforward design makes routine servicing simple for the home mechanic.
Build quality
Precision machining from Asheville ensures top-tier fit and finish.
Responsiveness
The 0.52-degree engagement provides immediate feedback the moment you pedal.
Key Specs
Freehub Body
Shimano Micro Spline
Hub Spoke Type
J-bend
Weight
291g
Position
Rear
Rotor Mount
6-bolt
Axle Type
12mm TA
Hub Spacing
157mm
Spoke Count
32
Engagement Points
690
Engagement Angle
0.52 degrees
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