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How can I put the derailleur on left side?

Discussion in 'Bicycle Mechanics and Repairs' started by stuee147, 11 May 2014.

  1. Why?
    Illaveago likes this.
  2. Nigeyy

    Nigeyy Veteran

    Massachusetts, USA
    I'd be concerned about the availability of left handed screw drivers to adjust the derailleur. I mean, if you get frustrated you could resort to a left handed hammer, but I'm not sure of the availability of either of those specialist tools on Amazon. That could be a real showstopper.
    mickle likes this.
  3. greenmark

    greenmark Über Member

    Hong Kong
    This thread is taking a sinister turn
  4. Ajax Bay

    Ajax Bay Über Member

    East Devon
    To offer depth to the recent revival of this thread, have a look at the OP's post here:
    OP is no longer OTP.
    @mickle if your "Why?" was addressed to me, I think his 'completion of project' presentation would be entertaining because the rider would be pedalling normally and (with my figure of eight chain solution) moving in 'reverse' (which would be a lot safer with stabilisers).
    ReverseBike likes this.
  5. Illaveago likes this.
  6. To solve the issue of a figure 8 chain I could add a secondary gear to the front so as you pedal, the front sprocket spins backward rather than forward. Then still mount the derailleur upside down...
  7. chriscross1966

    chriscross1966 Well-Known Member

    I think a starting point would be a Campagnolo Triomphe. You'd need to have spring coils made that worked the other way, file off the current mounting stops and use small steel screws to replace them, the parallelogram would be OK as is, you'd need to make a cage to suit, but that is a hand-tools job, you might want to use lefthand threads for the jockey screws. You haven't a hope with a slant without a machine shop, but a straight unit should be doable. You might want to get a later Triomphe with the script logo, polish it off and get it pantographed with the shield... Sounds like a fun project.
    Illaveago likes this.
  8. chriscross1966

    chriscross1966 Well-Known Member

    As you might have guessed I have a spare Triomphe mech if you want to buy it....
    Illaveago likes this.
  9. youngoldbloke

    youngoldbloke The older I get, the faster I used to be ...

    Yes, but, fixed wheel only on track bikes - that's easy.
  10. Ajax Bay

    Ajax Bay Über Member

    East Devon
    I think you could do this on a right hand side drive cassette (Campagnolo easiest) just the Ergos would operate the 'opposite' way. You'd need to have a small 'outside' sprocket, next to the largest for the lockring to work (effectively). Might well have trouble with cage clashing with spokes if the smallest sprocket is closest to them. Solution could be to put one or more spacers in next to the spokes. All this doesn't get you to the reverse bike goal though.
    chriscross1966 likes this.
  11. Smokin Joe

    Smokin Joe Legendary Member

    To sum up, no it can't be done.

    Unless you can manufacture the components yourself, of course.
    Illaveago and classic33 like this.
  12. classic33

    classic33 Legendary Member

    KaleCoAuto Left Handed Screwdriver


    Stortz Right Handed Model 83B Slate Hammer, or Left Handed Model 83C
  13. classic33

    classic33 Legendary Member

  14. Shut Up Legs

    Shut Up Legs Down Under Member

    I bet Park Tools have a left-handed screwdriver, and it probably has model number LHS-1. ;)
  15. Illaveago

    Illaveago Veteran

    An interesting concept but wouldn't the rear sprockets loosen as the thread is r/h ? Or have I got lost ?