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13-28 shimano custom cassette

mamba80mamba80 Posts: 5,032
edited February 2013 in Workshop
Any recommendations for anyone who can build up a 28/25/23 ...13 Shimano 10speed Cassette, using Ultegra or better bits.
I'm assuming they use Shimano bits and just strip them down to make up the cassette ?

Posts

  • drlodgedrlodge Posts: 4,825
    You can do it yourself I expect, I made up a custom 7 speed cassette using an HG-50 9 speed, but your issue will be with the 13T smallest, as most cassettes come with 11T or 12T smallest.

    I had to use the 13-14 from the old Durace cassette, then took the 16.18.21.24.28 off the HG50 and used 8 speed spacers.

    Its probably easier looking for a 11-28 or 12-28 10sp cassette. I can see a 105 cassette for £40 either 11-28 or 12-27 here http://www.chainreactioncycles.com/Mode ... elID=50454
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  • mamba80mamba80 Posts: 5,032
    I dont think that would be possible - as i said, i want a 28-25-23 ...13 (or even a 28-26-24...14) and shimano dont make that, as you said, the sprockets are riveted to a carrier as a 28-24-21 or 27-24-21.

    I particularly want narrower gaps from 28 down, the 13 is to make sure there arnt too big a gaps further down the cassette.

    but thankyou for taking the time to answer my question.
  • jibberjimjibberjim Posts: 2,810
    You can buy Miche sprockets to do what you want, not sure of an actual supplier though.

    Miche Primato sprockets, get a 13x28 and the 24/26 seperately.
    Jibbering Sports Stuff: http://jibbering.com/sports/
  • I am a miche supplier but a custom cassette is a special order from Miche agent. I keep the 12-29 cassette but that not what you want.
    http://www.thecycleclinic.co.uk -wheel building and other stuff.
  • drlodgedrlodge Posts: 4,825
    mamba80 wrote:
    I dont think that would be possible - as i said, i want a 28-25-23 ...13 (or even a 28-26-24...14) and shimano dont make that, as you said, the sprockets are riveted to a carrier as a 28-24-21 or 27-24-21.

    I particularly want narrower gaps from 28 down, the 13 is to make sure there arnt too big a gaps further down the cassette.

    Now I'm not familair with modern Shimano cassettes, but IF the smallest sprocket has the same fittings as larger sprockets on the cassette hub then you can make one up:
    - the riviets can be removed (as I did) e.g. by using a dremmel tool on one end to remove the end
    - you order 2 cassettes that between them give you the sprockets you want
    - then mix and match the sprockets and spacers to assemble your designed cassette.

    Using 2 cassettes complicates things due to the way Shimano sprockets are oriented, and that different cassettes come in different "families", so when mixed sprockets are put on a hub, the ramp/pins may not be aligned perfectly and shifting won't be optimum. But it will still work OK.

    E.g. on the UG81-10 cassette there are 3 options

    Option 1
    Sprocket Sizes 11-13-15-17-19-21-24-28-32-36
    Option 2
    Sprocket Sizes 11-13-15-17-19-21-23-26-30-34
    Option 3 --
    Sprocket Sizes 11-12-14-16-18-20-22-25-28-32

    You could make a cassette from (2) and (3) 28-25-22-20-18-17-16-15-14-13
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  • jibberjimjibberjim Posts: 2,810
    drlodge wrote:
    Now I'm not familair with modern Shimano cassettes, but IF the smallest sprocket has the same fittings as larger sprockets on the cassette hub then you can make one up:

    No you can't all Shimano cassettes have a number of the larger sprockets - at least 3 but up to 7 - that are bonded together so as to provide the extra stiffness required on such large diamaters without a high weight. The options are Miche where they're all seperate or suck it up...
    Jibbering Sports Stuff: http://jibbering.com/sports/
  • drlodgedrlodge Posts: 4,825
    jibberjim wrote:
    No you can't all Shimano cassettes have a number of the larger sprockets - at least 3 but up to 7 - that are bonded together so as to provide the extra stiffness required on such large diamaters without a high weight. The options are Miche where they're all seperate or suck it up...

    Most, but not all. It seems the 10 speed UG81 and Ultegra 6700 have the larger cogs bonded together, but my UG 50 9 sp doesn't, and that runs up to 32T. May be Shimano introduced this bonded thing on 10sp cassettes due to the thinner sprockets.

    I think the closest, easiest solution for the OP is to try the Ultegra 6700 12-13-14-15-17-19-21-24-27-30
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  • mamba80mamba80 Posts: 5,032
    Ah ! nothing is simple! but thanks anyway.

    However, further research shows that i can get a SRAM 1070 cassette in nr enough what i want (28-25-22...12) OR and this is by far and away the best solution..... buy the Shimano DA 9000 grp set as they have an 11sp 12-28 that matches what i want exactly :) lol
  • de_sistide_sisti Posts: 1,204
    I managed to customise a Shimano cassette to get a 13-28 nine speed. I used a Shimano 13 -25, cassette, removed
    the 16 and added a Highpath Engineering 28 sproket. So, I ended up with 13-14-15-17-19-12-23-25-28.

    Even if three or four of the cassettes are riveted together, the pins holding them together can easily be removed.
  • If you are still looking, Ambrosio do a shimano fitting 13-28 (13-14-15-16-17-19-21-23-25-28), lots of suppliers on ebay.
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