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  1. #1
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    stripping down a 10sp cassette

    Hey folks,

    I have a few 10 sp cassettes, 2 x 12-25, 1 x 11-28 and an 11-23.

    None of them are the cassette I'm looking for for an upcoming weekend...

    So, I'm looking to re-build the rivited together section with the spacing I realy want.
    # 11-28 : 11, 12, 13, 14, 15, 17, 19, 21, 24, 28
    I've already swapped out the 12 & 16 from a 12-25 into the 11-28 making a 12-28, I dropped the 11, it was never needed, I bought the cassette for the 28.
    but I'm left with
    # 12-28 : 12, 13, 14, 15, 16, 17, 19, 21, 24, 28
    What I realy want is
    # 12-28 : 12, 13, 14, 15, 17, 19, 21, 23, 25, 28

    Anyone done this?

  2. #2
    Senior Member IthaDan's Avatar
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    I've done it, it's a little more complicated than just popping the rivets [if you want it to function as shimano intended]. You don't need to replace the rivets, they just afford ease and speed rather than trying to corral 20 loose parts.

    Read up-
    http://sheldonbrown.com/k7.html#custom

  3. #3
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    It depends on the model cassette you have. Most Shimano 10-speed cassettes have the three largest cogs mounted together on a "spider". These can't be separated since these cogs aren't "full plate" but are only toothed rings with no center. They rely on the spider to mount on the freehub body.

    BTW, mix-and-match may lead to sluggish shifting as the shaped teeth may not line up in the intended relationship.

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    Quote Originally Posted by HillRider View Post
    It depends on the model cassette you have. Most Shimano 10-speed cassettes have the three largest cogs mounted together on a "spider". These can't be separated since these cogs aren't "full plate" but are only toothed rings with no center. They rely on the spider to mount on the freehub body.

    BTW, mix-and-match may lead to sluggish shifting as the shaped teeth may not line up in the intended relationship.
    Unfortunately the top (largest 5) sprockets are on a spider on all my 10sp cassettes.
    It is these sprockets on the spider that I am talking about removing and re-jigging.

    I have realized thought that I would not have a 17t sprocket that fits straight to the free hub. I would need to order one of those as a single from Harris cyclery.

  5. #5
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    I see no practical way to substitute for spider-mounted cogs. Each cog has it's own "bolt circle" and they are rivited in place individually. I don't think a different size cog could even be used as the mounting holes won't line up.

  6. #6
    Senior Member IthaDan's Avatar
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    DOH! forgot about the spyder. Well, actually, I didn't think a 105 cassette would be spydered (trying to not barrage newbies with info as of late).

    HillRider is right, those are stuck as a unit. Hmm wonder what the "best" cassette you can get without a spider is?

  7. #7
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    Aha!
    The wonders of amazon! I just ordered a 27t as a single cog to be used on the end of the fixed together section.
    Drop out the 16 from my 12-25 and I end up with
    12, 13, 14, 15, 17, 19, 21, 23, 25, 27
    The 17-25 being the fixed together section.
    Standard 12-27 is
    12, 13, 14, 15, 17, 16, 19, 21, 24, 27.

  8. #8
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    Quote Originally Posted by alex jb View Post
    Aha!
    The wonders of amazon! I just ordered a 27t as a single cog to be used on the end of the fixed together section.
    Drop out the 16 from my 12-25 and I end up with
    12, 13, 14, 15, 17, 19, 21, 23, 25, 27
    The 17-25 being the fixed together section.
    Standard 12-27 is
    12, 13, 14, 15, 17, 16, 19, 21, 24, 27.
    I'm glad you were able to get the single 27T. I hope you have a spare 10-speed spacer to go between the 25 and the new 27T cogs.

    For me, I would miss that 16T cog a lot and I find the bigger gaps at the large cog end a lot more tolerable. I once made a 9-speed 13x27 cassette (no it isn't a standard) by dropping the 12 and 13T first two cogs, substituting a 13T first position cog and adding a single 16T. I went out of my way to get that 16T and have no use for the 12T.

  9. #9
    Constant tinkerer FastJake's Avatar
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    Quote Originally Posted by HillRider View Post
    For me, I would miss that 16T cog a lot and I find the bigger gaps at the large cog end a lot more tolerable.
    +1

    I hardly ever use the smallest cogs (11 or 12T) and actually prefer big gaps on the other end because when I'm heading up a hill I want a shift to make a difference as I rarely cruise in those gears. But lately I've just been leaving cassettes alone because it's a pain finding the right cogs and they never shift quite as well after the cog replacements.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  10. #10
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    Quote Originally Posted by HillRider View Post
    I'm glad you were able to get the single 27T. I hope you have a spare 10-speed spacer to go between the 25 and the new 27T cogs.

    For me, I would miss that 16T cog a lot and I find the bigger gaps at the large cog end a lot more tolerable. I once made a 9-speed 13x27 cassette (no it isn't a standard) by dropping the 12 and 13T first two cogs, substituting a 13T first position cog and adding a single 16T. I went out of my way to get that 16T and have no use for the 12T.
    The 11-23 is basically useless to me, I'm not that strong! I'll be using that for spare parts.

    I do like the 16t, and you are right about the larger gaps being easier when higher up the cassette, but I have hopefully found a solution with the loose cogs I ordered.
    As well as the 12-27 I described above, I got a 13t as an end cog so I can go 13-27 (13, 14, 15, 16, 17, 19, 21, 23, 25, 27)
    Need to get it on the bike and see how smooth the shifting is.
    Last edited by alex jb; 04-16-12 at 07:21 AM.

  11. #11
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    Quote Originally Posted by alex jb View Post
    I got a 13t as an end cog so I can go 13-27 (13, 14, 15, 16, 17, 19, 21, 23, 25, 27).
    Campy offers a 10-speed 13x29 cassette that I think is nearly ideal for riders of modest ability in hilly areas (i.e. me). It's 13,14,15,16,17,19,21,23,26,29. I wish Shimano made the same configuration.

  12. #12
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    Quote Originally Posted by HillRider View Post
    Campy offers a 10-speed 13x29 cassette that I think is nearly ideal for riders of modest ability in hilly areas (i.e. me). It's 13,14,15,16,17,19,21,23,26,29. I wish Shimano made the same configuration.
    Exactly!
    The Shimano 11-28 has 17, 19, 21, 24, 28 I don't like all the 5 spider gears, especially the 4 tooth jump at the top.

  13. #13
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    Also, I ordered a 12-30 Tiagra cassette too.

    Not sure how my Ultegra short cage would like it on the TT bike, but if it doesn't work out I can use it on my cross bike or even may start my MTB upgrade from 1x9 12-32 to 1x10 12-30.

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