Noise from eccentric bottom bracket at every pedal

[onrbikes]

Another classic is the sharp noise from your pedal arm, and an easy fix. Thats if its a taper.

Remove the arm clean with a bit of emery cloth/sandpaper, get all the grease off with turps, let dry and reinstall.
Tighten, give it a light tap with a bit of timber, and check again so its tight.

Many people put grease on. This is one place you want dry and clean.

[rafiki]

Thanks all.

It is a gravelly sound.
It happens under load, otherwise she just sings along!
It came on quite suddenly. Repaired a puncture and put the wheel back on. Since then have taken it off, re-seated it and checked skewer not overtight.
Shimano bottom bracket BB-ES25-AK

Any supplementary thoughts?

Brian.

[JimK]

The gravel sound sure brings to mind a mismatch between chain and chainring and/or sprocket.

One wild idea: suppose the sprocket and chain both have an even number of teeth/links, or divisible by 3 or whatever. Maybe they've worn together in some repeating pattern. Then you put the chain back on but didn't line the pattern back up.

Maybe try removing the wheel again and just move the chain one step up on the sprocket?

[rafiki]

Thanks. I'll give it a go in the morning. Just did a 40 km ride on my trusty old lady - a 22 year old Dawes Mean Street. Absolutely silent.

[jags]

Hah HA there u go you cant beat tried and tested gear works every time..

[rafiki]

True, but I'd still like to get my Sterling working properly again. 

[jags]

AH just winding you lads up. if as you say its a grinding noise it has to be bearing problem either in the pedals or  BB.mind u try  degreasing the chain wash it in warm soapy water and relube .

[rafiki]

Not so much a grinding noise as a gravelly noise really.

[jags]

has to be bearings.

[Matt2matt2002]

I go for chain n sprockets.

[rafiki]

Just returned from a 53km ride after moving the chain along one link. BINGO! Smooth as silk under any load. On the first climb I kept her in the highest gear I could and stood up. My heart missed a beat when there seemed to be an irregular ticking sound - until I realised it was some road tar bits being thrown up into the mudguard!

Problem solved! Thanks to everyone who has contributed their thoughts and suggestions.

[jags]

emm thats a new one on me .great your sorted

[Danneaux]

Wonderful news, Brian! So glad you're sorted. Thanks for the followup; it is bound to help others as well.

Best,

Dan.

[geocycle]

Take a bow JimK! Glad you are sorted.

[JimK]

Wow, fantastic! That was a shot in the dark, but sometimes the target gets hit!