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double chain ring fixie?

Discussion in 'Fixed Gear and Single Speed' started by Yellow Fang, 26 Jun 2008.

  1. Yellow Fang

    Yellow Fang Guru

    Location:
    Reading
    Suppose I were to convert my road bike to a fixie with the use of a rear derailleur. Would I still be able to use the double chain ring, or would there be issues?
     
  2. skwerl

    skwerl New Member

    Location:
    London
    you can't do that. a rear derailleur will casue the chain to suck when you apply any kind of back-pressure to the pedals. you'll most likely end up in a hedge
     
  3. skwerl

    skwerl New Member

    Location:
    London
    if, for some reason, you need a two-speed fixed there is the option of fixing an old SA hub or using a Schlumpf mountain drive I guess.

    I'm wondering why you'd want such a thing though.
     
  4. domtyler

    domtyler Über Member

    I would personally recomend that you simply go out and buy a fixie, either off the shelf or get one made up from a track frame. The result will be much more rewarding than something hashed together out of empty washing up liquid bottles and old fridge freezer parts.
     
  5. OP
    OP
    Yellow Fang

    Yellow Fang Guru

    Location:
    Reading
    Yeah, but where's the fun in that? I'm bored of my bike and want to do something to it.

    Also, I read in another thread that it is not recommended to use a Sclumpf mountain drive on a fixed wheel as it would tend to unscrew itself.

    Aren't those singulator mechanisms similar to derailleurs?
     
  6. Joe24

    Joe24 More serious cyclist than Bonj

    Location:
    Nottingham
    You can use n old double chainset. You could even leave both rings on if you wanted. But if you wanted to takeone off you would either need to shorten the bolts or buy new shorter ones.
    You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy. Or do what i think is called an 'urban' singlespeed. You pick the gear you like on your geared then just shorten the chain and either put a chain tug on or a rear mech set up so it stays in one place with no cable on i.
    Why not get anold track/road frame with horizontal drops and convert that to fixed. Would be much more fun, and you will then have another bike?
     
  7. Dave Davenport

    Dave Davenport Guru

    Location:
    Hampshire
    Do you actually mean 'singlespeed' not 'fixie'?
     
  8. OP
    OP
    Yellow Fang

    Yellow Fang Guru

    Location:
    Reading
    Fixie, although probably both, as I would probably go for a flip-flop hub.
     
  9. domtyler

    domtyler Über Member

    Fair enough, if you get your fun out of the building and not the riding I guess! :becool:
     
  10. Dave Davenport

    Dave Davenport Guru

    Location:
    Hampshire
    You can't run a fixed with any sort of sprung chain tensioner, singlespeeds ok though.
     
  11. skwerl

    skwerl New Member

    Location:
    London
    you can't make a fixed with a singulator/derailleur. Once the tension in the chain starts in the reverse direction, ie as soon as you stop accelerating, you'll get chain suck.
    Try it and see
    The only way you might get close to getting away with it is if you have something similar to a singulator that isn't spring loaded but locked in place. My idea was to mount a jockey wheel on a bracket fixed to the underside of the chain-stay, adjusting tension by sliding toward, away from the stay in the vertical plain.
     
  12. Riding in Circles

    Riding in Circles Veteran

    Location:
    EDINBURGH
    Not if you use one with a torque arm.
     
  13. Joe24

    Joe24 More serious cyclist than Bonj

    Location:
    Nottingham
    No, i said to make an Urban Fixed/singlespeed with a chain tug. Please not: "You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy"
    Singlespeed is really a fixed gear, only one gear. Fixed wheel is no freewheel. Or thats how i see it anyway.
     
  14. skwerl

    skwerl New Member

    Location:
    London
    Fixed gear/Fixed wheel are the same thing=no freewheel

    S/S=freewheel
     
  15. Joe24

    Joe24 More serious cyclist than Bonj

    Location:
    Nottingham
    Alright then. I saw it differently.