Equivilant replacement derailleur for Shimano RD-M739 SGS, Deore XT- Mtbr.com
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  1. #1
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    Equivilant replacement derailleur for Shimano RD-M739 SGS, Deore XT

    Howdy,

    I have a 1996 GT LTS-1 that I need to replace the rear derailleur on. It has a Shimano RD-M739 SGS, Deore XT. I upgraded the cassette to a 34T and need get a derailleur that will work with that cassette. I'm looking at the Shimano Acera M360 7/8-Speed Rear Derailleur and wondering if anybody has a better suggestion or can confirm this is an equivalent derailleur.

    Thanks

    David Logan

  2. #2
    Sneaker man
    Reputation: mik_git's Avatar
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    I Think - (pretty sure, but could be wrong) a 9 speed derailleur will work with an 8 speed cassette and shifter. Others will chime in with actual facts, but I'd go a much newer 9 speed XT rear mech like a 770 series or similar (I have 2 running 34 tooth cassettes and work fine...but they are 9 speed front to back)

    But the Acera is not the equivalent derailleur, it is waaay lower end. Work yes, but I wouldn't personally put it on that bike unless true emergency, but if that's all you can get, then it may have to do. (as in It's a nice bike, thats a low end part. XT is 7xx series, Acera is 3xx, so 4 levels lower)
    All the gear and no idea.

  3. #3
    Bikes in jeans
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    Yes, either 8 or 9 speed would work, both are usually easy to find on ebay in very good condition. One thing to be cautious of is the rapid rise versions that are out there. But I'd be looking at a 9sp XT or XTR.
    WTB: Med Bontrager Ti Lite, PM Me...

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