Upgrading Rear Mech/Cassette

s.woody
s.woody Posts: 181
edited August 2008 in MTB workshop & tech
Hi all. Could do with some advice.
I'm looking to upgrade the rear mech and cassette on my 2007 Giant XTC 4.5 to a Shimano XT Rear Derailleur and XT Cassette 9 Speed, which will require a Super Narrow 9-speed HG chain which I'm all fine with.

My query is will the new XT set up require an XT chainset also? As am I right in thinking their could be some problems with the new narrower XT cassette and chain if I was to leave the current TruVativ ISOFlow chainset on?

Any advice would be appreciated, cheers.

Comments

  • nicklouse
    nicklouse Posts: 50,673
    rest of the kit on the bike is what?

    current mech/shifter/chain.....
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • kegs
    kegs Posts: 204
    If its 9 speed already then it'll be fine
  • nicklouse
    nicklouse Posts: 50,673
    as long as it is not Sram.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • s.woody
    s.woody Posts: 181
    Yes its a nine speed still on the standard kit:

    Rear Mech - Shimano Deore LX
    Front Mech - Shimano Deore
    Shifters - Shimano Deore 27 speed RapidFire Plus
    Chain - Shimano HG73
    Chainset - TruVativ ISOFlow 22/32/44
    Cassette - SRAM PG950 11-34 (is that a problem?)

    Also am I right in thinking that the triple chainset will require the Super Long Cage Shimano XT Rear Derailleur?

    Cheers
  • nicklouse
    nicklouse Posts: 50,673
    well as it is a 9sp shimano set up you have no issues. (cassettes dont matter).

    long cage rear mech needed.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • s.woody
    s.woody Posts: 181
    What about if I was to just upgrade to XT cassette and chain, would they be compatible with the Deore LX rear mech?
    Cheers
  • nicklouse
    nicklouse Posts: 50,673
    yes. it is all interchangeable.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • s.woody
    s.woody Posts: 181
    Just one more question. Upgrading to a 9 speed XT cassette requires a super narrow HG chain yes? Would a SRAM PC951 9 Speed Chain be ok to use with the XT cassette?
    Cheers
  • nicklouse
    nicklouse Posts: 50,673
    no it does not need you to change anything. as you are already running 9spd.

    but yes a sram 9sped chain works.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • scottyjohn
    scottyjohn Posts: 143
    One other thing to note, the cassettes usually come in 11-32 or 11-34. I didnt realise this when I upgraded my chainset with a Deore cassette at the back. The XT chainset was obviously slightly different ratio from my old truvativ one, and this made my gearing feel slightly longer, i.e. I couldnt get my gearing as low as I could previously. I then changed my cassette to an 11-32, and it felt better again. Just a thought to mention....

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