Vibration through crank

[DiggyGun]

Hi All

I have a Nevo3 GT Vario GX bike which has developed a vibration through the crank that is felt when peddling.

Specifically, it is more noticeable when the Enviolo hub is in more lower resistance. For example;
- when the display is showing a hill, (more resistance) and I’m using Tour, get a vibration

- when the display is flatter and I’m using EMTB or Turbo, no vibration

I’ve checked the following;
- pedals, weren’t loose, but nipped up.
- rear wheel, both nuts were loose, so tightened up.

Anyone else had this issue and found a solution?

DG…

 

[Stefan Mikes]

I hope someone can offer an advice, as I experience a similar vibration on my Vado SL at times...

 

[fooferdoggie]

the bosch motor can have rumble at certain rpms. a new chain can have a lot of rumble for a bit too.

 

[DiggyGun]

Yesterday, the bike started to make a grinding noise in addition to the vibration when peddling a bit harder.

So did some further investigation. Firstly, found that the bearings were very graunchy on the pedals. Changed them, hoping this did the job. But no, vibration is a bit better and the pedals also feel better. Secondly, borrowed the noise down to the rear Enviolo hub area. Could replicate it, by turning the pedals by hand, but couldn’t locate the actual source of the noise.

Recently, had some work done on the Enviolo hub, as had a broken part, which was swapped out and some new cables. So assuming that it is associated with that, maybe an alignment issue.

If I don’t pedal too hard, all is quiet, so hopefully will be OK until I can get my LBS to have a look at it again.

DG…

 

[sammcneill]

Yesterday, the bike started to make a grinding noise in addition to the vibration when peddling a bit harder.

So did some further investigation. Firstly, found that the bearings were very graunchy on the pedals. Changed them, hoping this did the job. But no, vibration is a bit better and the pedals also feel better. Secondly, borrowed the noise down to the rear Enviolo hub area. Could replicate it, by turning the pedals by hand, but couldn’t locate the actual source of the noise.

Recently, had some work done on the Enviolo hub, as had a broken part, which was swapped out and some new cables. So assuming that it is associated with that, maybe an alignment issue.

If I don’t pedal too hard, all is quiet, so hopefully will be OK until I can get my LBS to have a look at it again.

DG…

Curious to know what went wrong on Enviolo? I’ve got two R&M with this hub and believed they were pretty bomb proof?

 

[DiggyGun]

Curious to know what went wrong on Enviolo? I’ve got two R&M with this hub and believed they were pretty bomb proof?

I had a puncture in the rear and when removing the cables noticed that the securing clip was broken, but could find the bit, so not sure when and where it happened.

DG…

 

[Brendon@OEB]

What generation Bosch motor do you have? On the earlier Gen 2 motors I've had vibrations with the Vario hubs due to a near 1:1 ratio and the reduction drive in that drive unit. It happens when pedaling harder with the motor working hard too.

 

[DiggyGun]

It’s the Bosch Performance CX motor.

DG…

 

[PedalUma]

@DiggyGun, Are you running a chain or a belt? It could be time for cleaning off the bike in a jar and lube immersion in a jar. It could be time for belt or chain replacement or also replacement of the rear sprocket/cog. Gates still require maintenance and it is costly. Oh, if at the time of service they over-tightened the belt or chain it could give these symptoms exactly as you describe. Check that first.

 

[DiggyGun]

Update.

Bike has been back to the LBS, where they did some investigation.

They said it sounded like something was rubbing, but couldn’t find where. Checked the alignment if the rear wheel to make sure perfectly straight and sprayed some silicone spray on the rubber belt. But they couldn’t get the vibration.

They advised now quieter and to try it out, which I will do in between the the rain.

If no better, they will take to the group head office workshop to see if they can sort it out.

DG…