Road derailleurs on mtb- Mtbr.com
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  1. #1
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    Road derailleurs on mtb

    Hi out there
    My XT frontderailleur is kinda heavy (about 155gram), so i thought that a roadderailleur could fit?
    Size is 34,9 and uses toppull, rings are 44/32..
    Looking at campagnolo, i find some sub 100gram units, but do they fit?
    I run SRAM X.0 twisters ?

    Thx in advance

  2. #2
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    problem!

    Quote Originally Posted by Zeus !
    Hi out there
    My XT frontderailleur is kinda heavy (about 155gram), so i thought that a roadderailleur could fit?
    Size is 34,9 and uses toppull, rings are 44/32..
    Looking at campagnolo, i find some sub 100gram units, but do they fit?
    I run SRAM X.0 twisters ?

    Thx in advance
    you have no luck: road derailleurs are all bottom pull.

  3. #3
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    do you got a frame with buttompull it's no problems.

  4. #4
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    Ha ha
    I didnt know that :-)
    So, got to get XTR then, perhaps with alubolts.
    Thanx!

  5. #5
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    There was an adapter that shimano made available around '90-'95 that allowed a bottom pull FD to be operated from above. It required a cable anchor on the frame around the BB/chainstay area.

  6. #6
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    correct BUT....

    Quote Originally Posted by Zanetti
    There was an adapter that shimano made available around '90-'95 that allowed a bottom pull FD to be operated from above. It required a cable anchor on the frame around the BB/chainstay area.
    hey - his main goal was to loose weight...such an adapter might weigh more than his current derailleur

  7. #7
    All 26.5" all the time!
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    The adapter probably weighed less than five grams.....but finding one today would be tough. There was a period in time where top tube cable routing was becoming very trendy, but top pull F derailleurs weren't available. In that time, just about every MTB sold with top tube routing came with one of those adapters or a pulley setup.

  8. #8
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    Quote Originally Posted by Zeus !
    Ha ha
    I didnt know that :-)
    So, got to get XTR then, perhaps with alubolts.
    Thanx!
    I'm not sure how much new old-stock searching you want to do, but the xt front derailleur previous to this one only weighed about 125 grams. It was a decent derailleur other than the fact that the cage could bend a little under heavy shifting load.

    I really lucked out when I ordered a 34.9mm a few years ago, when I really needed a 31.8mm. It just sat around until I bought an NRS frame that took a 34.9 clamp. I think the old lightweight derailleurs were already quickly disappearing at that time, but I had my little mistake in my parts bin.

  9. #9
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    Quote Originally Posted by kingfurby
    I'm not sure how much new old-stock searching you want to do, but the xt front derailleur previous to this one only weighed about 125 grams. It was a decent derailleur other than the fact that the cage could bend a little under heavy shifting load.

    I really lucked out when I ordered a 34.9mm a few years ago, when I really needed a 31.8mm. It just sat around until I bought an NRS frame that took a 34.9 clamp. I think the old lightweight derailleurs were already quickly disappearing at that time, but I had my little mistake in my parts bin.
    You didn't say if it was high or low mount, but either way JensonUSA has the old 123g XT M750-FD in 34.9 top-pull for just $19.50. Just got one myself and it's working great. Also if you're a fan of the older RD's the have them too.
    One day your life will flash before your eyes, will it be worth watching??

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