Horrible resonance and vibration from CX race

[jgolden3]

Hello, I appear to be one of the most unlucky emtb riders on the planet as after having problems with Brose and Shimano motors (two replaced of each), I am having my second major issue with the Bosch.

Can you have a listen to this video and tell me what you think the constant drone is? You can hear the normal motor noise as I pedal along, but I’ve started hearing this noise on fast, warm ascents. At one point in the video I hum along with the pitch of the drone which is quite noticeable. I can also feel a vibration through the pedals.

Many thanks in advance!

Josh

 

[Tony4wd]

Sounds a bit like a brake disc rubbing - if that noise is coming from the motor it's warranty time (something like loose motor windings vibrating perhaps)