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Worn cassette ?

  • 03-03-2013 9:15pm
    #1
    TheBlaaMan
    Registered Users, Registered Users 2 Posts: 3,481 ✭✭✭


    I'm just finishing a build, and a first spin showed the chain (brand new) is slipping quite badly in the intermediate sprockets, but OK in the upper 2 and lowermost 2 (or so). The (Miche) cassette came on the s/h wheel I got and is probably the source of the issue. I have a better (Campag Athena) cassette, but as of yet, no tool to change it out :( and I dont want to go chasing my tail on this if the original is OK.

    Anyway, I'd be grateful if you have an opinion on the cassette based on the (rather large) pics. To me, it looks somewhat worn, but probably not enough to me causing such skip??? Thanks in advance.

    P1070822%20Large.JPG
    P1070823%20Large.JPG
    P1070825%20Large.JPG


Comments

  • #2
    bcmf
    Closed Accounts Posts: 6,679 ✭✭✭bcmf


    The cassette on the wheel was prob ok with the previous owner as they used it with a chain that matched the wear.
    You stick on a new chain and its skips. Only real way to see is to stick on the new cassette and use it with your new chain.
    It doesn't too bad but will prob have a particular wear 'pattern' thats not suiting your new chain.


  • #3
    route66
    Registered Users, Registered Users 2 Posts: 1,012 ✭✭✭route66


    Comparing the LHS face of the teeth in the cog under the one the chain is on (in pic one) with those on the smallest (nearest) cog I can see a significant difference.

    I'm no expert, but I think you have self diagnosed this correctly.

    Unless there is something else wrong that you are not telling us about - like that chap in a recent thread who - despite saying "Chain length and components shouldn't be an issue" - posted this picture:
    01-weefrontweeback.jpg


  • #4
    TheBlaaMan
    Registered Users, Registered Users 2 Posts: 3,481 ✭✭✭TheBlaaMan


    bcmf wrote: »
    The cassette on the wheel was prob ok with the previous owner as they used it with a chain that matched the wear.
    You stick on a new chain and its skips. Only real way to see is to stick on the new cassette and use it with your new chain.
    It doesn't too bad but will prob have a particular wear 'pattern' thats not suiting your new chain.

    I guess I should just use that Athena cassette I got from that nice guy from Balbriggan :)......... I hope it likes new chains.
    OK, so I need a cassette tool

    route66 wrote: »

    Unless there is something else wrong that you are not telling us about - like that chap in a recent thread who - despite saying "Chain length and components shouldn't be an issue" - posted this picture:

    Eh..........that would be a 'No' Ted...... :)


  • #5
    seamus
    Registered Users, Registered Users 2 Posts: 68,190 ✭✭✭✭seamus


    Cassettes tend to wear asymmetrically because you spend most of your time in the mid ranges. So while the largest and smallest sprockets can look OK, the middle ones are much more worn.

    You can see two teeth about to break in the first picture, 3rd cog from the bottom. Overall it actually looks OK, not badly worn, but really only if you were using the chain that came with it. You can see why a new chain would be skipping on it.


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