Alaskan
Well-Known Member
Tell your tech he is going down the wrong path. IT IS THE HUB. My bet is that there will be a recall on the hub coming soon. The stock Shimano hub is failing all over the place. Mine which had the motor replaced by Bosch, continued to make the noise until they replaced all the internals of the hub. The noise is caused by the failure of a spring for one of the pawls in the freehub, which in my case interfered with and caused total failure of the clutch plates. Now with under 300 miles the rebuilt hub is failing to, making the identical scratchy noise, in synch with the wheel spinning, not the crank. Stop pedaling and coast and the noise goes away. Tell your mechanic to call Trek tech support and don't bother the folks at Bosch.Hi Over50,
Exactly 510 miles, and mine has been great. No flying batteries, although I am very careful when I reinstall to make sure tight.
Only issue I am having is the scratchy, grinding noise that I had mentioned to you privately. Was intermittent starting at 100 miles, they could not find a problem at 300 mile checkup - but since 400 miles noise is non-stop. Syncs with the cadence of the back wheel, not the pedals. I think hub, tech says hub is fine, talking to Bosch. Bike is in the shop right now. Will report on outcome.
Unlike GuruUno, Alaskan, and you, my bike is still totally stock.
Happy Riding!
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