Bike noise, creak, click, creaks, clicks, clicking, pinging sound - help

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Scilly.Suffolk in reply to @NotThamesWater

It looks as though the chain roller catches on the tooth of the cog as it moves off...

I has the same with a brand new set-up.

Charlie the Bikemonger was a stumped as I was and refunded the sprocket, returning it to Surly under warranty.

Surly accepted it, noting that it was a problem they were aware of in certain circumstances, but wouldn't be drawn on what those circumstances were.

Looking at the profile of the teeth, they were wider at the top compared to other sprockets, ie not pointed.

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NotThamesWater in reply to @Scilly.Suffolk

what those circumstances were

Being used on a bicycle, it would seem.

I'm going to try a different sprocket instead .

I see what you mean about the shape of the teeth - they're almost squared off. On the old sprocket, the wear pattern suggests that the chain doesn't like the square teeth at all.

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