i9 Hydra Replacement or Conversion
Replace your existing Industry Nine Hydra mountain freehub with this complete kit.
If converting from Shimano Micro Spline, please note factory spec involves HAX2631 (QR) or HAX2637 (12x).
- Available in SRAM XD, Shimano Microspline, Shimano HG 9/10/11 Speed, and Single Speed
- Compatible with Hydra mountain rear hubshells
- Freehub body
- Bearing spacer
- Freehub body seal
- Drive-Side Endcap (MS only)
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Mfg PartNum: HKMFH02
Shimano Micro Spline
Mfg PartNum: HKMFH20
Shimano HG 9/10/11 Speed
Mfg PartNum: HKMFH01
Mfg PartNum: HKMFH03
If you already have i9 hydra hubs, having this freehub can make it easier to swap cassettes depending on SRAM/Shimano. Also, YouTube has tutorials on how to service and maintain these freehubs, including which grease and oils to use to not only keep it moving but to add or omit the distinct i9 buzz. They also sell the pawls, bearings and springs to make them good as new. Make sure you don't get these for i9 1/1 hubs!
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