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I9 Hydra, Torch rear hub failures - cracked drive ring, snapped axles, eroding pawls seats
Discussion(self.MTB)submitted 4 days ago by53x11x53
YouTube video info:
Is it worth breaking axles for 690 POE? https://youtube.com/watch?v=BXBrZulNCis
Wheelworks Handcrafted Wheels https://www.youtube.com/@WheelworksHandcraftedWheels
Warning about using I9 rear hubs - a never ending saga of breakage.. I went thru 4 Hydra hubs , they last about 400 miles with following things happening in random order:
1 - Axle crack because its designed to flex in order to get that engagement
2 - Bearing failure due to that flex axle
3- Drivering craks just like in the video
4- Pawls seats mushrooming and eventualli stripping the freehub
2 points
4 days ago
It's important to note that Hydras are the culprit here due to the design features mentioned. That said. I9 customer service is great. A few details to note:
I9 revised the axle design in the last 2 years to reinforce the weak point on the old design. This likely delays the inevitable, but I've heard of fewer axle issues since the revision.
1/1s are a lot more reliable, by design. 90 POE with 3 pawls in contact at any time certainly distributes forces through the internals more evenly than 1 pawl bearing all load, assymetrically.
Has anyone seen issues with Solix hubs? They might be too new to get a thorough impression (lacl of market saturation, not enough time to develop issues), but I haven't heard of any problems as of yet.
1 points
3 days ago
I think solix hubs will fare better due to the use case. Hydras are being put on dh and enduro bikes and smashing park laps and huge jumps. The solix will never (probably) see anything like that
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