9 speed chaintset/10 speed front mech

vbc
vbc Posts: 1,104
edited June 2008 in Workshop
Another one of those 9 speed/10 speed compatibility questions I'm afraid.

Can I use a 10 speed Ultegra front derailleur on a 9 speed chainset or is there some issue with the chainring spacing? It's a triple by the way.

Thanks.

Comments

  • John.T
    John.T Posts: 3,698
    If the chain is also 9sp it is not advisable as the cage is a little narrower and will be more likely to rub. No problem with ring spacing, most after market chainsets are 9/10sp anyway.
    My Fleet.
  • andrewgturnbull
    andrewgturnbull Posts: 3,861
    Hi there.

    On the other hand, my cross bike has 9 speed chainrings on an otherwise 10 speed set up, and I've never noticed any difference.

    Cheers, Andy
    http://www.andyturnbull.co.uk
    http://www.stirlingtri.co.uk
  • maddog 2
    maddog 2 Posts: 8,114
    what john said

    10spd chain - okay
    9spd chain - probably not a good idea - chain rub etc.
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • vbc
    vbc Posts: 1,104
    So if I use 10 speed front and rear mechs, 10 speed chain, the 9 speed chainset with TA 8/9/10 speed chainrings - it should all work with my 9 speed Ultegra shifters?
  • John.T
    John.T Posts: 3,698
    The full story is now begining to unfold. You do not want to know if you can run a 9sp chainset with an otherwise 10sp setup.
    If you are running 9sp STIs and cassette it is not wise to use a 10sp chain. It will work but not as well as a 9sp one. The 10sp front mech is more likely to suffer chain rub so I would not advise it. Use a 9sp one.
    If you are running 10sp STIs and cassette you can use a 9sp chainset with no problem and can use a 10sp front mech. A 9sp one will still work but may need the tips of the cage closing slightly for best operation. I have this on a bike with a SRAM compact fitted. It works fine. You can also run a 9sp rear mech on 10sp with no problem.
    I am not sure what you are trying to achieve but I hope I have covered most posibilities.
    My Fleet.
  • maddog 2
    maddog 2 Posts: 8,114
    just buy a 9spd front mech 8)

    everything else will be fine

    (9spd everything apart from the rear mech which will be fine at 10spd)
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • vbc
    vbc Posts: 1,104
    Yep, sorry about that, I was just running through the compatabilty issues out of interest.
  • John.T
    John.T Posts: 3,698
    Look here for Shimano compatability charts.
    http://cycle.shimano-eu.com/publish/content/cycle/seh/nl/en/technical_service/faq_s/compatibilty_charts.html
    My Fleet.

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