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I'll give that a try. The shop lubed the chain last week when I tried to get them to fix the issue but it does feel a bit waxy and stiff.

Good ideas. Thanks. I'm 270lb and have fairly strong legs so yeah there must be a lot of torque. We'll see how the return goes. They are claiming there's nothing wrong so it would be an exchange for a preferred product or a credit. Argh.

I described it as intermittent because there are lots of hills then brief flats then more hills in my neighborhood. When I took it out on a long flat trail it was pretty much a constant and this morning when settling in to a consisitent cadence and steady mph it was clearly there most of the...

I really appreciate that. Thank you.

That seems like a reasonable suggestion but they have already claimed there's nothing wrong. I agree it isn't broken in yet, but if I break it in and the vibration continues and they deny feeling it then I'm outside the return window and I have to find someone else to work with at my expense...

I think it might be time to just let the LBS diagnose and fix. I don't believe they've spent enough time on the bike at a constant cadence on flat ground to have felt it. They promote themselves as having hilly, no traffic test routes and that isn't going to uncover this. I can sort of...

In the photo that looks like it might be a separate movable part but its just the way the piece is made. It is solid.

I am feeling more confident that this has nothing to do with the motor though.

I'll have to look closer later. I just spun the cranks a few times and can see no indication of an inner or outer tooth geometry on this chain ring. The crankset is described as Acid E-Crank 38T, 175mm but I haven't yet found documentation about it.

Ohhhh. Thanks for that. I'll take a look. So by 'inner' and 'outer' they mean a specific tooth for a narrower link and a wider link. Attached a pic of the derailleur. I don't see a clutch there.

Ah thanks. No clutch for me. I wonder if there's a way to simulate the functionality temporarily to see if that has an effect. I'll have to look at the chainring later. I don't know about the inner/outer tooth thing. Sounds like another new thing since I've been out of the biking world...

I don't know. I don't think I've had (or known I had) a derailleur with a clutch before. The exploded view for the Shimano Deore RD-M4120-SGS, 10-Speed doesn't show anything like that.

I've been able to reliably reproduce this vibration now. It happens in a lot of different combinations of parameters but it's easy to get it to happen in the 60-70 rpm range at 10+/- mph in eMTB mode on the fifth cog and on flat ground. It definitely feels like a chain resonance and it goes...

Duh. When I "settle in" it is probably at about the same cadence no matter the speed. I think I'll have to do some counting.

Just for you

It doesn't depend on road speed. It seems to happen whenever I settle in to a constant cadence. Actually it doesn't seem to happen when I'm pushing the motor, which is something I hadn't realized till just now. The vibration feels the same whenever it does occur, meaning that the frequency of...

I'm curious if anyone else has experienced this vibration in their Kathmandu. Is it a trend or a one-off situation?

Hi, I've put only 30 miles on my new 2022 Kathmandu and really like almost everything about the bike except an annoying vibration that I feel in the pedals. I haven't found any particular combination of boost, gear and cadence that is immune to this. It happens intermittently but fairly...