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When to Replace a Cassette

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  • May 9, 2018 at 11:06 am #28495
    Canyon48

    Hi All,

    I’ve been having issues with my bike which I determined to be because of a worn chain (the .75% wear indicator slid in with room to spare).

    I’ve inspected the cassette and there is a small lip on the top edge of many of the teeth, an obvious sign of wear.

    At what point should I change the cassette? I’ve only done 2100 miles, though most of those have been over this past winter, in very poor conditions!

    Cheers

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  • May 21, 2018 at 8:12 am #919237
    0
    MariaMartinez

    If you have only worn one

    If you have only worn one chain from new to 0.75 wear there is no way the cassette is worn out. The chainring will wear out first because there are relatively fewer ring options for the chain to be on, albeit over a bigger arc……the chainring may wear round 1.5 (0.75 x 2) chain equivalent and the cassette 2-3 (0.75 x 4) unless you bought a super expensive lightweight cassette which do wear a bit faster.

    May 9, 2018 at 4:39 pm #919235
    0
    Canyon48

    Chainrings look fine, not

    Chainrings look fine, not much worst than my summer bike (which has only done 600 miles – all in good weather).

    The lip is 130 microns according to my depth gauge.

    May 9, 2018 at 2:49 pm #919233
    0
    Mr Pennington

    Post close-up photos of the

    Post close-up photos of the cassette teeths. The photos will tell us if “small lip” is small don’t worry about it the cassette has good life left, or it’s worn and needs to be replaced.

    May 9, 2018 at 12:12 pm #919231
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    StraelGuy

    Tuggles is spot on. Chuck the

    Tuggles is spot on. Chuck the new chain on and ride it and if it skips, change the cassette as well. My winter bike spends it’s life with chain and 105 cassette covered in liquid, gritty mud and the cassette is still good at ~2,500 miles.

    May 9, 2018 at 11:52 am #919229
    0
    tugglesthegreat

    You would soon find out if

    You would soon find out if you put a new chain on the bike.  If the cassette was too badly worn a new chain would not mesh with it and you would get jumping, expecially when you put pressure on the pedals like going up hill.

    It doesn’t sound like that much mileage for the cassette to be worn out, but riding with a badly worn chain will drastically reduce its life.

    Would sound like to me the chain and cassette would need changing, if it is streached by that much.  How are the chain rings?

     

     

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