• This topic has 4 replies, 4 voices, and was last updated 2 months ago by pdw.
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  • Best laid plans – chain rotation balls up
  • Premier Icon charliemort
    Full Member

    Changed my chain ring, chain and cassette 18 months or so ago

    Sensibly, I bought 2 chains to rotate them and maximise life of cassette

    So of course new chain has sat in garage ever since

    Measured original one – it’s over the .075 (or is it .0075?) wear limit. Stuck new chain on anyway and it runs and shifts fine (no chain suck or anything) but is rumbly in lower gears (not surprisingly)

    So –
    Stick with new chain, i suspect it will get quieter with a few rides ; or shove knackered one back on and ride chain cassette and ring into the ground?

    Premier Icon Onzadog
    Free Member

    I’d say you’ve waited too long. When the new chain goes quiet, you’ll know you’ve accelerated wear on 0.75%.

    If it were me, I’d put the old chain back on and run it all to destruction, then keep the new chain for the new cassette and chainring.

    I’m assuming the cassette is the most expensive part of all that and what you’re looking to protect but it sounds like it’s already worn.

    Premier Icon scotroutes
    Full Member

    If it’s still close to the .75 mark then I’d  run the new chain. When I was doing the hire fleet that’s what we’d do and that was based on a few years/multiple bikes “testing” sample.

    2 chains to a cassette.

    2 cassettes to a set of chainrings.

    We didn’t “rotate” in the way that your post suggests. Keeping track of over 100 chains for more than 50 bikes would have been a step too far 😂

    Premier Icon tomtomthepipersson
    Full Member

    If it’s shifting fine then stick with the new chain.

    Premier Icon pdw
    Free Member

    If the new one works, stick with it.

    When it gets to .75%, try another one. You probably still won’t need to replace the chainring, and you might get another chain out of the cassette if you’re lucky.

    I’ve never been a fan of the “run it into the ground” approach, because I find that once they get much past 1% the drivetrain noise is unbearable. Chainrings are expensive, and should see out plenty of chains.

    I also don’t both with “rotation”: just fit a new chain before .75% and bin the old one.

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