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Respacing a 9 speed cassette

louismichaelslouismichaels Posts: 118
edited May 2009 in Workshop
If I wanted to respace a 9 speed cassette (let's say an 11-34) for use with a 10 speed system (Ultegra 10 speed STI levers and derailleur) what width of shim/spacer should I use?
This is so I don't potentially run out of gears on big, long mountain climbs.
Any ideas gratefully received.

Posts

  • Mister WMister W Posts: 853
    You can't.
  • louismichaelslouismichaels Posts: 118
    Even if I take the cassette apart and use a different thickness spacer?
  • nicklousenicklouse Posts: 81,520 Lives Here
    well you need a 10spd cassette and the spacer that come with it.

    shimano 8/9 speed freebodies are compatable with the newer 10spd cassettes. but you need that spacer.

    see here. http://www.bikeradar.com/forum/viewtopic.php?t=12586223
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • flasherflasher Posts: 1,707
    Why don't you just buy a cheap 10 speed cassette?
  • louismichaelslouismichaels Posts: 118
    It's not a cost issue.
    It just appears that with a ten speed system, the largest cassette cog is a 27 (Shimano), 28 (SRAM) or 29 (Campag, but not compatible).
    So, I thought, if I respace a 9 speed cassette (which go up to 34), I can stick with my 10 speed system and take advantage of the lower gearing!
  • avoidingmyphdavoidingmyphd Posts: 1,154
    get your wallet out:

    http://www.cyclingnews.com/tech.php?id= ... x_launch09

    SRAM's new xx groupset will feature 10 speed 11-32 and 11-36 cassettes.

    singletrack reckon over 300 usd for one though:

    http://www.singletrackworld.com/2009/05 ... -close-up/

    seriously, though, at some point a cassette that meets your needs and costs a sensible amount will surely hit the market, if there isn't some obscure one out there already? if you start messing with the 9 speed, the shifting is bounds to be a fool up.

    (finally, pedant alert: shimano will soon go to 28 when the new ultegra is available. this doesn't help you though)
  • flasherflasher Posts: 1,707
    You can get a Marchisio cassette up to a 30. Not a cheap option but they do work.

    http://clemenzo.com/index.php/content/view/23/43/
  • RedJohnRedJohn Posts: 272
    Have a look here - up to 30T shimano or Campag

    http://www.parker-international.co.uk/3 ... sette.html
  • RedJohnRedJohn Posts: 272
    Oops beaten to it!
  • Monty DogMonty Dog Posts: 20,614
    Obviously depends on the model of cassette and whether you can pull it all apart into seperate spacers. I've done this with 8 and 9 speed cassettes including making Campagnolo spaced cassettes for MTB hubs - the joy of a Campagnolo drivetrain and disc brakes. Highpath Engineering will do you a set of spacers for £15 or you may find one of the Mavic spacer kits may suffice.
    Make mine an Italian, with Campagnolo on the side..
  • louismichaelslouismichaels Posts: 118
    Many thanks for the advice and links.
    Will have a look around...
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