Sachs, rear cassette

surreychris
surreychris Posts: 51
edited August 2010 in Workshop
Hi
I've just been given some wheels with an 8 speed sachs rear cassette on them, but my bike is running 105.

Is it possible to get a 105 rear cassette to fit, or will the sachs run as is, I would like to get a higher gear on it if possible, even if that means running a new sachs cassette,

Thanks Chris

Comments

  • softlad
    softlad Posts: 3,513
    edited August 2010
    It's possible the Sachs cassette may be a screw on type - in which case finding a 9/10sp screw on might be tricky. You don't say what age 105 you are running, which might be useful info...

    There is no 'new' Sachs stuff, incidentally - SRAM bought them out when they first got into the groupset business...
  • bill57
    bill57 Posts: 454
    Not 100% sure but I think the Sachs 8 speed is a screw-on freewheel, not a cassette.
  • surreychris
    surreychris Posts: 51
    ah ok,thanks for the help.

    So my options would be to get a different sachs freewheel, or to get the wheel rebuilt with a new 105 compatible hub and cassette, any ideas on costs? Thanks

    Oh, its a 2010 bike running 105

    Thanks again

    Chris
  • softlad
    softlad Posts: 3,513
    if it's the old Sachs Aris screw-on type, then you will not get one in anything larger than 8sp - so the best option would be to have the wheel rebuilt with a new 10sp hub - but these days it's possible to pick up a perfectly good set of training wheels for around £100, so I'm not even sure I'd bother doing anything with them....
  • surreychris
    surreychris Posts: 51
    Sorry I meant to have a bigger gear. This has a 39x 21. The wheels I'm used to have a 39x25. I guess I could just go up the hills quicker lol

    These are zipp carbon wheels do I'd like to use them for tt's and racing.

    Ta
  • nicklouse
    nicklouse Posts: 50,673
    so you run some old skool 105 which are 8spd?

    and all you want is a new cassette/freewheel with a lager big cog?

    sure there are some out there.

    But first we need to identify if it is a cassette or a spin on freewheel.

    have a read

    http://www.sheldonbrown.com/free-k7.html
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • surreychris
    surreychris Posts: 51
    Thanks for the link. It's definitely a sachs freewheel.

    I'm running new 105. But would like to run these wheels but would prefer a higher 1st gear. Something like the 25 teeth I'm used to. Looks like I'll be looking for a sachs freewheel with the ratios I want.

    Thanks for your help guys.
  • nicklouse
    nicklouse Posts: 50,673
    SurreyChris wrote:

    I'm running new 105. But would like to run these wheels but would prefer a higher 1st gear. Something like the 25 teeth I'm used to. Looks like I'll be looking for a sachs freewheel with the ratios I want.

    Thanks for your help guys.

    will not work the spacing between the cogs is wrong.

    either go back to an 8spd shifter or new rear wheel.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • surreychris
    surreychris Posts: 51
    Ah ok. Thanks. Rebuilding these wheels with 105 hub/cassette then.
  • softlad
    softlad Posts: 3,513
    hold on a sec...

    the wheels you mention - you are saying they are Zipp carbon rims with a Sachs 8sp freewheel..? In which case, I doubt you will find a compatible 105 hub to build them onto. And like I said before, you will not find a Sachs freewheel which is compatible with a 10sp set up.

    Can you post a pic of the wheel.....?
  • surreychris
    surreychris Posts: 51
    I'm at work so can't get a pic. But they're zipp 440, 24 spokes on the rear.
  • softlad
    softlad Posts: 3,513
    SurreyChris wrote:
    I'm at work so can't get a pic. But they're zipp 440, 24 spokes on the rear.

    plenty of options for replacement 10sp compatible 24h hubs, but not on 105....
  • surreychris
    surreychris Posts: 51
    Sorry, its a 9 speed, on a Boardman Comp, running 105/tiagra,

    So what are my options?

    really appreciate the help, sorry if im coming over a bit vague, im at work so not near my bike or wheels.

    Chris
  • softlad
    softlad Posts: 3,513
    same answer. Sachs screw-on freewheels only ever went up to 8sp. But any modern freehub design should be able to take 9 or 10 speed cassettes without issue....

    Planet X will sell you a fairly cheap 24h hub which will do the job - depends how much you want to spend...
  • surreychris
    surreychris Posts: 51
    cool thanks very much for your help, Ill price it all up and see what works out.

    Chris

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