Sadly about to return my Kathmandu Hybrid one 500
- Thread starter jpkara
- Start date
Stefan Mikes
Gravel e-biker
- Region
- Europe
- City
- Mazovia, PL
I cannot understand it. The Shimano Deore RD-M4120-SGS is describer as a "Shadow" derailleur, and Shadow is for the clutch in the Shimano systems.
What thing is it? Can you move it forward with your fingers?
Comfortably Numb
Well-Known Member
I just searched. The 4120 derailleur does NOT have a clutch. CN
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 believe they didn't feel it if they didn't settle in to a groove.
I do want to have troubleshooting suggestions for them that don't make them smirk and ask me "have you ever ridden a mid motor ebike" again because it might make me snap. I'll assume they haven't been gaslighting me.
If anyone finds any useful documentation on the crank set I'd appreciate a shout. Acid E-Crank 38T, 175mm is how it shows up on the spec sheet. Maybe rebranded? I want to find out if there is a right way to install the chain for this chain ring.
I do want to have troubleshooting suggestions for them that don't make them smirk and ask me "have you ever ridden a mid motor ebike" again because it might make me snap. I'll assume they haven't been gaslighting me.
If anyone finds any useful documentation on the crank set I'd appreciate a shout. Acid E-Crank 38T, 175mm is how it shows up on the spec sheet. Maybe rebranded? I want to find out if there is a right way to install the chain for this chain ring.
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Comfortably Numb
Well-Known Member
I believe ACID is a Cube owned brand. I have the same crank on mine. CNI 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 believe they didn't feel it if they didn't settle in to a groove.
I do want to have troubleshooting suggestions for them that don't make them smirk and ask me "have you ever ridden a mid motor ebike" again because it might make me snap. I'll assume they haven't been gaslighting me.
If anyone finds any useful documentation on the crank set I'd appreciate a shout. Acid E-Crank 38T, 175mm is how it shows up on the spec sheet. Maybe rebranded? I want to find out if there is a right way to install the chain for this chain ring.
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. Is that a bad assessment?
The warranty gives the retailer the discretion. Cube FAQ
When you return it, consider buying a bike with a through axle rear wheel rather than QR - I can't imagine the forces going through that rear axle - between the torque from the motor and your legs ( given you are a " big guy" ) .
ps my suggestions - try to replicate the feeling with the bike upside down / in a stand. That'll give you a chance to look / feel for what is happening. eg Is it one pedal or both, a certain chain position ( eg the split link being on upside down or a stiff link) ,
ps my suggestions - try to replicate the feeling with the bike upside down / in a stand. That'll give you a chance to look / feel for what is happening. eg Is it one pedal or both, a certain chain position ( eg the split link being on upside down or a stiff link) ,
Comfortably Numb
Well-Known Member
I'll be riding mine tonight. I'll pay real attention to anything that can construed as a vibration. CN
I really appreciate that. Thank you.
Comfortably Numb
Well-Known Member
I have never felt anything I would describe as happening INTERMITTENTLY in the drivetrain.
I mean, if it's doing something, it does it ALL the time. CN
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 time. It kind of feels like someone strummed a big rubber band on the pedals, most noticeably on the downstroke of my left pedal.
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'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.
Hello,
Sorry for reviving old thread but I bought used Cube Kathmandu Hybrid EXC 750 (2022) with exactly same issue. I have derailleur clutch but position has no effect to vibration. Freshly changed new chain and rear sprockets pack but no effect. I noticed that rear thru axle has tendency to come loose, because of vibration maybe?
I have now driven about 750 km and the vibration hasn't changed.
Any ideas?
Sorry for reviving old thread but I bought used Cube Kathmandu Hybrid EXC 750 (2022) with exactly same issue. I have derailleur clutch but position has no effect to vibration. Freshly changed new chain and rear sprockets pack but no effect. I noticed that rear thru axle has tendency to come loose, because of vibration maybe?
I have now driven about 750 km and the vibration hasn't changed.
Any ideas?
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