10 spd chainset 9 spd chain

nicknick
nicknick Posts: 535
edited July 2007 in Workshop
I run 9 spd shimano (i know its so last yr!) and i fitted a dura-ace hollowtech 2 a bit ago. I did read somewhere they are compatible with 9spd chains but recently i noticed the chain is a bit noisy on the front rings. The chain is fine as i checked it with a chain checker. Are these actually compatible? Anyone with experience pls help! I dont want to wear out a £70 chainring!

Comments

  • MarvintheAndroid
    MarvintheAndroid Posts: 409
    The number of speeds (9 speed, 10 speed etc) refers to the number of cogs on the back, not the number of rings on the front. So yes, they are fully compatible.

    You quite rightly checked that chain for wear, but it could also be the chainrings that are worn. Aluminium rings in particular can wear quite fast.

    Marv
    What tree ? ...........

    Trek 8000 ZR XC hardtail.
  • maddog 2
    maddog 2 Posts: 8,114
    9 and 10spd chains have the same internal width - only the external width is different - so on a ring they are identical.

    maybe you just need some lube...... :wink:
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer
  • nicknick
    nicknick Posts: 535
    Thanks for replying. I clean it often and lube etc, the chainset isn't old enough to be worn or had enough use. i hope not anyway! So is a 10spd chain compatible with a 9 spd cassette? apologies if thats a ridiculous question!
  • Uranus
    Uranus Posts: 887
    The only difference between 10speed and 9-speed chainsets that I could measure was that the two rings were slightly closer together. The 10-speed chain has slightly thinner side plates. Again on the cassette the sprocks are slightly closer together, but I don't think there is any real danger of the chain falling between two sprockets - might happen with a 10-speed chain on an old 5-speed freewheel though?!

    It does sound like new-chain-on-old-sprocket syndrome to me (or old chain on new sprocket?). You might only find out by changing the noisy chainring for a new one.
  • cabron
    cabron Posts: 16
    I'm wondering if I have a related compatability problem - I have a 10 speed FC-R700 50/34 chainset, FC-6600 BB, but a 9 speed chain and cassette. When in 34/12 the chain catches on the pins on the inside of the 50T chainring, and in the next 2 or 3 sprockets it rubs against the inside of the 50T ring, although it doesn't catch on the pins.

    The way I see it this is either chainline (which isn't adjustable?) or a chain that isn't quite narrow enough - which would maybe make sense.

    Any ideas?
  • Uranus
    Uranus Posts: 887
    It's probably not really related . .

    The original poster probably has a wear problem, you have a chainrub problem.

    A 10-speed chain would help, being a tad narrower, as would using a 48T outer sprocket - but chain rub in smallest/smallest with a compact chainset is iinevitable in my experience.

    The only real answer is: Don't use that gear. You're well into overlap with the big ring by the time you're on 34/14, so just change to the big ring earlier.

    Or buy a bike with very long chainstays.
  • nicknick
    nicknick Posts: 535
    I think im just gonna whack a new chain on. And a new cassette on pay day! CABRON, how about considering BB width?
  • MarvintheAndroid
    MarvintheAndroid Posts: 409
    Uranus wrote:
    The only real answer is: Don't use that gear. You're well into overlap with the big ring by the time you're on 34/14, so just change to the big ring earlier.

    Agree, try to avoid cross-chaining as much as possible, but a slightly narrower chain should help.

    Marv.
    What tree ? ...........

    Trek 8000 ZR XC hardtail.

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