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  1. #1
    Ankles Suck! norcodirtjumper's Avatar
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    2 speeds possible with single speed kit.

    My friend is buying a single speed conversion kit for his bike and we were just wondering if it is possible to have the rear single speed but keep the front a dual chainring with a derailer. So he can only switch the fron gears. In a sence he would have 2 gears. Is this possible, Im thinking it is because he is buying a chain tensioner to use with it. Just want to make sure.

  2. #2
    Canon fiend MadMan2k's Avatar
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    I don't know how well that would work.. if the chain's long enough to fit on the big ring, it might be kinda loose when it's on the small ring. Although maybe a tensioner would do just as good a job as a rear derraileur would.

    Has he considered just a single ring setup?

  3. #3
    Ankles Suck! norcodirtjumper's Avatar
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    Well ya he has considered it because it was his initial plan. Then we got thinking how cool it would be to have 2 up front. Either way he is going single speed in the rear but this would be better.

  4. #4
    Ride for Life wearyourtruth's Avatar
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    why?? does he want to go single speed or not? imo if he's going to go 2 he might as well go 5-6, i.e. go single on the front and just keep the rear derailer/cassette. if he's REALLY set on 2 gears, then i would also think that instead of doing 2 up front, use spacers and do 2 cogs in the rear, depending on how much he cares, might not even do a derailer in the back, just the tensioner, need to switch gears? stop and switch it over.

    i dunno... i just think it'd look kinda goofy to have the extra ring and derailer up front when it's so simple in the back.
    before posting, a "noob" should always ask themselves "could this have been answered by first visiting Sheldon Brown

    -Tim-
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  5. #5
    Ankles Suck! norcodirtjumper's Avatar
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    He would like it like that so he could have 1 gear for climbing and 1 gear for speed, its just that simple. If he had 2 gears in the back they wouldnt be that diverse of gear ratios. But if he had two up front they would be totally different. Plus, I dont know about you guys but we all feel the same when we say that front derailers are more reliable than rear. I just want to know if it will work. I guess we could always try for ourselves.

  6. #6
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Won't work, chain line on a SS is the major key to having it work.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  7. #7
    What does this button do? Nickiscommon's Avatar
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    White industries makes something called the double double, two ratios without any difference in chain length, or a skewed chainline. Double freewheel in back, and double chainrings in front.

    http://www.whiteind.com/ENO_web/eno-index.html

    You still have to get off the bike to change gears though.

  8. #8
    Ride for Life wearyourtruth's Avatar
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    Quote Originally Posted by norcodirtjumper
    If he had 2 gears in the back they wouldnt be that diverse of gear ratios. But if he had two up front they would be totally different.
    not necissarily, you could run a 12 and a 34 cog if you really wanted. the limiting factor of how diverse your gear ratio will be is the play in your tensioner. i don't know if you can have a 32 and 22 front chainring and have it be able to keep the chain tight for both, that would be a matter of inches in the chain. but i guess as you said, it might just be a matter of trial and error...
    before posting, a "noob" should always ask themselves "could this have been answered by first visiting Sheldon Brown

    -Tim-
    www.velocipedebikeproject.org

  9. #9
    Canon fiend MadMan2k's Avatar
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    I just saw this, looks like it's similar to what he's trying to do - http://www.rivendellbicycles.com/htm...quickbeam.html

    But, I'd guess the horizontal dropouts make or break that feature.

  10. #10
    Ride for Life wearyourtruth's Avatar
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    set it up like a hirondelle

    anyone ever build a 2speed hirondelle style
    (from the alt bike forum)
    before posting, a "noob" should always ask themselves "could this have been answered by first visiting Sheldon Brown

    -Tim-
    www.velocipedebikeproject.org

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