Old 08-13-19, 11:11 AM
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Bikes: Argon 18 Gallium, BH G7, Rocky Mountain Instinct C70

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Metallic pinging sounds from cassette - but only when dirty

So I'm scratching my head over this one...

When my 11speed Shimano cassette is dirty my bike will emit a metallic pinging/clicking noise. It almost sounds like a creaking sound as if the bike is going to explode at any moment. But the noise only happens when the cassette is dirty. Take rear wheel off the bike, scrub the cassette with a degreaser/brush, put the wheel back on the bike and bingo! Sound/noise is gone.

But ride the bike for a distance (120k? 200k? distance varies) and as the cassette gets dirty the noise start up again. I've had the bike in to the LBS and they couldn't figure it out. At first they thought it was a spoke tension issue. It wasn't.

Anyone have any ideas what it may be? I'd like to get the cassette off the free hub and give it a proper cleaning, but I can't get the lock nut off (the subject of another post over here).

Thanks for your time/reading. Cheers.

Last edited by NoWhammies; 08-13-19 at 12:11 PM.
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