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  1. #1
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    Too much tension in rear derailer cable or shonky Brifter?

    Hello all,

    I am having problems with my Shimano RX 100 brifters. I recently alligned my rear derailer. I find that although shifting down gears is fine, as soon as I try to shift up a gear it skips all cogs and goes to the upper limit(smallest rear cog), set by the limit screw. Does anyone have any advice? I think it may be too much tension in the cable but am not sure.

    Any help would be greatly appreciated thankyou.

  2. #2
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    shifter pawls not catching. hose it down with some spray lube

  3. #3
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    Quote Originally Posted by reptilezs View Post
    shifter pawls not catching. hose it down with some spray lube
    +1
    Dried grease, dirt or rust is binding the mechanism and the little springs aren't strong enough to overcome it. Though WD-40 inflames many on this forum, it or something like it is perfect for this job. .Spray it in and work the levers back and forth to loosen everything, then flush once more and let it dry
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  4. #4
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    I have flushed the mechanism a few times with wd 40. Will try again today. I have read that pulling apart the brifter is a no no. However if it come to it will changing the spring help? Or should I use a specialized lubricant be the first course of action. Is there a non - discontinued shimano brifter which I can replace the rx100 with?

  5. #5
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    Ok i have talked to a few people and read a bunch. Flushing it didn't work because the ratchet tooth was broken. The most common cause is the gunking up of components from under use, rust and dirt. The best thing to do for anyone else who has this problem is to degrease(not with wd40) over a period of a day while moving the components from time to time. THen make sure you re lubricate as well or thing will start falling apart.

    As for me I dont want to give up on the Rx 100 STI and components are no longer produced by shimano, so, if anyone has an old RX 100 or 105 7 speed right hand shifter please let me know and I will make you an offer. Many thanks to everyone who took the time to respond and have a read of the problem at hand.

    Happy hunting.

  6. #6
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    Quote Originally Posted by mojobot View Post

    As for me I dont want to give up on the Rx 100 STI and components are no longer produced by shimano, so, if anyone has an old RX 100 or 105 7 speed right hand shifter please let me know and I will make you an offer. Many thanks to everyone who took the time to respond and have a read of the problem at hand.

    Happy hunting.
    Check out ebay seller "eeforme" -- he overhauls Shimano brifters. I bought a set of 3x7 RSX brifters from him earlier this year; they have been flawless. I recommend him highly.
    http://stores.ebay.com/eeforme?_rdc=1

    He may do repairs; I'm not sure. See his FB page "Shimano STI Shifter Repair"
    http://www.facebook.com/pages/Shiman...r/137062087082


    Dunno if he'll take your old brifters in trade or not.

    Hope this helps.

    -TH

  7. #7
    bike whisperer Kimmo's Avatar
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    If I was you I'd read the writing on the wall and get some proper brifters.

    You can make Campy brifters work with your Shimano derailleur with a Shiftmate. Alternatively, 8spd Campy brifters and a matching rear derailleur will shift your 7spd cassette perfectly, since it's the same 5mm spacing.

    Not sure if there's a Shiftmate for SRAM, but then I'm not sure either how superior Doubletap is to STI.

    IMO it's plain as day that Ergo is vastly mechanically superior to STI, and the new hidden cable STI is doubtless an even more horrendously complex rat's nest of bent and pressed steel plate. Yuck.

    Bona fides: I've overhauled (complete disassembly) STI and Ergo, and for the record, IMO Shimano stuff is generally better* - except when it comes to brifters.

    *Not ultimately better - Campy is porn and SRAM is light, but better in an all-things-considered, average scenario kinda way.

  8. #8
    Senior Member IthaDan's Avatar
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    Some bf member had two pairs of those for sale recently in one of the for sale fora.

    Link- http://www.bikeforums.net/showthread...5-STI-shifters

    Shimano : Click :: Campy :: Snap :: SRAM : Bang

  9. #9
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    Righto. Does anyone know if the Sora 3300 7 speed will be compatible?

  10. #10
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    I've got an RSX 7 speed pair in the basement. They worked fine when I took them off to put on Ultegra a few years ago. PM me if you want to make an offer.

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