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  1. #1
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    sti/rapidrise/flightdeck

    OKay here is a question for you






    I am building a new touring bike. Am going to use road shifters with mtb gears and derailers. Now 2 questions really, rapid rise or not? If rapid rise will this mess up the intended use of a flightdeck computer.Otherwise will the computer be able to be programed backwards or will everything be bassakwards. That is fouling up gears and cadence readings ? any answers out there. rapid rise sounds cool when cranking up a hill with a load. Especially when you're an old fart. doug

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    Perineal Pressurized dobber's Avatar
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    The Flightdeck has a specific setting for rapid rise derailleurs.
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

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    biked well well biked's Avatar
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    Personally, I wouldn't go rapid rise on a touring bike. The concept makes sense for quick downshifting off road, but not for anything on pavement. But that's your choice, of course. But I don't think brifters will work with a mtb front derailleur, or at least not well. Different cable pull I believe.

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    thanks dude

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    I figure they must work builders like cannondale and co-motion use them

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    biked well well biked's Avatar
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    Quote Originally Posted by dougfixit@hotma
    I figure they must work builders like cannondale and co-motion use them
    I doubt they use mtb front derailluers on their touring bikes with brifters. The rear derailleurs, yes, but not the front. If the frame you're using will take a bottom pull front derailluer, just use a road "triple" front derailluer, something like a 105 should work fine.
    edit: see post below
    Last edited by well biked; 08-16-06 at 06:41 AM.

  7. #7
    Perineal Pressurized dobber's Avatar
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    Quote Originally Posted by well biked
    I doubt they use mtb front derailluers on their touring bikes with brifters. The rear derailleurs, yes, but not the front. If the frame you're using will take a bottom pull front derailluer, just use a road "triple" front derailluer, something like a 105 should work fine.
    I may have it wrong, but I believe the issue with front derailleurs is that you are more limited as to your chainring sizing with a given unit.


    I use a rapid rise rear derailleur on the aforementioned Cross-Check, coupled with bar-con shifters on a Midge bar. Nice to be able to just palm the shifter from the drops.
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

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    biked well well biked's Avatar
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    Quote Originally Posted by dobber
    I may have it wrong, but I believe the issue with front derailleurs is that you are more limited as to your chainring sizing with a given unit.


    I use a rapid rise rear derailleur on the aforementioned Cross-Check, coupled with bar-con shifters on a Midge bar. Nice to be able to just palm the shifter from the drops.
    I agree about the barcons. The thing with using brifters with a mtb front der. has come up before, though; it might work, but probably not very well because there's a slight difference in the amount of cable pull required between the road and mtb front deralleur units. Ideally, if he wants to use brifters on a tourer, he should get a 110/74 BCD crankset instead of a mtb model and fudge the gearing between what's typically "mountain" and "road", something like a 48t or 46t big ring, and he could go as low as a 34t middle ring and 24t inner ring. That way, the "road" front der. would work well with the cranks and the brifters. With a 46t big ring, I'm running a 105 front derailleur, although I did dremel the der. cage a little to better match the shape of the 46t ring.

  9. #9
    Perineal Pressurized dobber's Avatar
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    Quote Originally Posted by well biked
    he should get a 110/74 BCD crankset instead of a mtb model and fudge the gearing between what's typically "mountain" and "road", something like a 48t or 46t big ring, and he could go as low as a 34t middle ring and 24t inner ring. That way, the "road" front der. would work well with the cranks and the brifters.
    Yep, that's the ticket, basically a "touring" crank.

    http://aebike.com/page.cfm?PageID=30...ils&sku=CR1030
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

  10. #10
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    Got a 48-36-26 shimano octo hollow, anybody need an xtfront nib. Could save it though for the mountain rig. Thanks for the help guys, anybody know where there's a 105 9speed tripple (cheap).

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