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  1. #1
    cyclepath daredevil's Avatar
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    single speed with front der?

    This isn't a true single speed issue but I wasn't sure where else it belonged.

    I've got a mid 80's steel road bike that I want to do something with. It used to have downtube shifters and years ago I had it converted to brifters. Now I'm thinking about a single speed, or a single chainring with a cassette. I'm open to suggestions.

    Somebody suggested a single cog in back with triple chain rings. Have any of you ever done that or seen a bike like that? Good idea, bad idea, stupid idea?
    --------------------------------------------------------------------------------------------
    "Without music, life would be a mistake."
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  2. #2
    raodmaster shaman
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    you will have to still have a rear dearailer to take up the chain tension. at that point you might as well put a cable on it and have a regular multispeed.

  3. #3
    cyclepath daredevil's Avatar
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    Good point. That's the kind of stuff I'm looking for. Thanks. I can put that idea to bed. Now the choice is a single chain ring with a cassette or a regular SS. My problem with an SS is that I live in the mountains and I'm afraid it wouldn't get much use. Just occasional rail trail riding or whatever.
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  4. #4
    Senior Member
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    Quote Originally Posted by daredevil
    Good point. That's the kind of stuff I'm looking for. Thanks. I can put that idea to bed. Now the choice is a single chain ring with a cassette or a regular SS. My problem with an SS is that I live in the mountains and I'm afraid it wouldn't get much use. Just occasional rail trail riding or whatever.
    SS with a low enough gear will get you over plenty of hills and you can always coast down. Some people do single chain rings on their cross bikes and commuters. I guess it lets you ditch the front shifter, FD, and chainring, but I don't really see the point. Simplicity for simplicity's sake?

  5. #5
    PatronSaintOfDiscBrakes dynaryder's Avatar
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    Quote Originally Posted by daredevil
    Somebody suggested a single cog in back with triple chain rings. Have any of you ever done that or seen a bike like that? Good idea, bad idea, stupid idea?
    Someone posted a link to a bike that had a setup like that,only it had a Nexus hub on the rear. Can't remember what model,you'd have to search through the Commuter forum. Shimano makes a tesioner so you run multiple rings up front with an SS rear.

    Seems to me you'd do better running a single front ring with a cassette on the rear. Just front rings are going to give you some pretty big jumps in gears.

    C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport/Qualifier,Dahon Speed Pro TT,Brompton S6L

  6. #6
    aka mattio queerpunk's Avatar
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    something like VD's yamaguchi?
    the hipster myth.

    i practice vagabondery.

  7. #7
    aspiring dirtbag commuter max-a-mill's Avatar
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    i think a hot idea might be 22x32 in front with like a 16 in back. use a chaintensioner....

    then you'd have a "normal" ss mtb ratio and a superlow gear for climbing the STEEP long climbs.

    never tried it though, so i can only guess that, in theory, it should work allright.
    Last edited by max-a-mill; 05-09-07 at 01:59 PM.
    - the revolution will not be motorized -

  8. #8
    cyclepath daredevil's Avatar
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    Quote Originally Posted by max-a-mill
    i think a hot idea might be 22x32 in front with like a 16 in back. use a chaintensioner....

    then you'd have a "normal" ss mtb ratio and a superlow gear for climbinhg the STEEP long climbs.

    never tried it though so i can only guess that in theory it should work allright.
    I like it. I have climbs around here where I would be out of the saddle constantly on an SS I think.

    Concerning gaps in gearing, that doesn't really concern me. I wouldn't be shifting very often.
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  9. #9
    aspiring dirtbag commuter max-a-mill's Avatar
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    i think you'd want to use a nice tensioner (an old rear d might work best) that keeps the chain nice and tight (storng spring) and can take up all that slack between the two gears easily. i don't think the standard singlespeed tensioner is going to work well for you because it is not desgined to take up that much slack.
    - the revolution will not be motorized -

  10. #10
    hiphopopotamus wolfbrother's Avatar
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    I predict a single speed mountain bike will make you very happy. I built one up last year with a 32x15 ratio (it fit perfectly without a tensioner) and I love it. It kills hills, and it actually forces me to slow down and take in the city a little more. I put it together just for the hell of it, thinking I wouldn't ride it a whole lot, but it has far exceeded my expectations. I've even taken it to work a few times (8.5 miles each way) and they were surprisingly excellent rides.

    You can look at it right here : http://velospace.org/node/2696

  11. #11
    hiphopopotamus wolfbrother's Avatar
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    you know what? I read "mountains" and "bike" and completely missed that you said it was a road frame. my apologies, but riding single speed is fun and challenging regardless of what kind of bike it is.

  12. #12
    Tiocfáidh ár Lá jfmckenna's Avatar
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    My cyclocross bikes like many others have a single ring up front because it's simpler and usually if you drop a chain it's from shifting the front or bouncing it off. It's less likely to loose a chain on a properly adjusted cog set. I use 8 speed in the back. I live in the mountains too and have a fixed gear ratio just good enough to get over 80% of the climbs. Some are a real struggle but others are OK. It's a bit of a trade off and it's excellent training for strength and a hell of a lot of fun.

  13. #13
    señor member seaneee's Avatar
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    Why wouldn't you just use a flip flop with two different freewheels, one for climbing and one for sprinting. How long are your dropouts?

    Or just could just get a 3sp internal hub.

  14. #14
    Villainous huerro's Avatar
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    You can use two chainrings as long as they are close together and you have long dropouts, but you will not be able to shift on the bike.

    I rocked the "Dingle Speed" (as someone around here called it) for a little while with a 42 ring on the outside and a 40 on the inside. I didn't have single chainring bolts. It turns out you can ride just fine, even without the perfect chainline.

    Check out the Quickbeam here.

  15. #15
    Bottles & Chains Dicko's Avatar
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    if you had a bit of dough you could hook up one of these setups from white industries...

    http://www.whiteind.com/ENO-cranks-specs.html

    they call it the double double. the idea is that you use either a 38/16 or a 35/19 ratio which both end up having the same chain length. i'm not sure how much that would help though because it would take a fair bit of messing around to change gears.

  16. #16
    thomas masini lives
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    Quote Originally Posted by queerpunk
    something like VD's yamaguchi?
    oooooh mama
    not a 2ksuck'r

  17. #17
    A little North of Hell
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    Quote Originally Posted by daredevil
    Have any of you ever done that or seen a bike like that?
    Not roadbikes but, this should give you some ideas.
    http://forums.mtbr.com/showthread.ph...iple+chainring
    [SIGPIC][/SIGPIC]
    XXXI

  18. #18
    cxmagazine dot com pitboss's Avatar
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    I know a few people in the world of Cyclocross that utilize a single chainring/cassette type set-up.

    check in that forum area for more info if you choose that path
    Deathlap - cyclocross, training, beer,...escape hatch

  19. #19
    . blickblocks's Avatar
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    Quote Originally Posted by queerpunk
    something like VD's yamaguchi?
    That's brilliant, I love it!

  20. #20
    #$%^&* paulv's Avatar
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    On a different note (rear der only) there's a bike on fyxomatosis that I bookmarked some time ago, one chainring and shifter, rear derailleur - but anyone know why the front derailleur would be needed? For the weight of a chainring, cable and shifter one might as well have twice as many gears, or why not drop the front derailleur altogether?

    http://www.fyxomatosis.com/news.php?readmore=246

  21. #21
    Guy on a Bike TreeUnit's Avatar
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    I thought about doing this. If you want gears, but want to keep the bike simple, Try a Shimano Nexus Multispeed Hub. 7 gears, no deraileurs. It'll cost you at least $150 though

    You could also try an Internally Geared Bottom Bracket. Really sweet, but they cost around $500 and have to be imported from Czechokoslovakia

  22. #22
    Team Beer Cynikal's Avatar
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    Quote Originally Posted by paulv
    On a different note (rear der only) there's a bike on fyxomatosis that I bookmarked some time ago, one chainring and shifter, rear derailleur - but anyone know why the front derailleur would be needed? For the weight of a chainring, cable and shifter one might as well have twice as many gears, or why not drop the front derailleur altogether?

    http://www.fyxomatosis.com/news.php?readmore=246
    The only reason for that would be to help keep the chain from dropping off the chain ring. I doubt that would be an issue with only a 5 speed rear cluster but it ain't my bike. I run a single front with an 8 in the rear and I've never had a chain drop.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  23. #23
    re:member
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    Quote Originally Posted by TreeUnit
    I thought about doing this. If you want gears, but want to keep the bike simple, Try a Shimano Nexus Multispeed Hub. 7 gears, no deraileurs. It'll cost you at least $150 though

    You could also try an Internally Geared Bottom Bracket. Really sweet, but they cost around $500 and have to be imported from Czechokoslovakia
    Ehm,
    .ch stands for Switzerland.

  24. #24
    #$%^&* paulv's Avatar
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    Chwizerland

  25. #25
    Senior Member yellowjeep's Avatar
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    2 speed fix with the geared bottom bracket?

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