Hubbub Shimergo

Discussion in 'Bicycle Mechanics and Repairs' started by winjim, 15 Oct 2015.

  1. winjim

    winjim Iron pony

    If I Hubbub a 9sp Campagnolo Ergopower with a 9sp Shimano Sora rear mech will that work? I only need it good enough to get me by until I get a chance to build up a new wheel, then it's going fully Campagnolo.

    Ta :okay:
     
  2. Spoked Wheels

    Spoked Wheels Guru

    Location:
    Bournemouth
    I think a 9 speed would work with a 10 speed ergo shifters and hubhub derailleur but maybe you can try a 7 speed cassette.
     
  3. OP
    OP
    winjim

    winjim Iron pony

    Yes, you're right if you want to achieve perfect shifting. But how about this:

    Cable pull(9sp ergo) = 3mm
    Pull ratio(Hubbub) = 1.6
    Mech travel = 3mm x 1.6 = 4.8mm
    Sprocket pitch(9sp Shimano) = 4.35mm
    Error per click = 4.8mm - 4.35mm = 0.45mm

    I forget about the sprockets at either end of the cassette, which I don't need anyway. I set the limit screws on the mech to index sprockets 2 and 8. Then I've only got five sprockets to think about. Set indexing on the middle sprocket, then the maximum total error is 2 x 0.45mm = 0.90mm on sprockets 3 and 7, which I should be able to live with. I've then got a useable, if not ideal, seven speed system. Sound reasonable?
     
  4. Spoked Wheels

    Spoked Wheels Guru

    Location:
    Bournemouth
    If you got the parts then you should try it out. Maybe the tesults is good enough for what you need.
     
    winjim likes this.
  5. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    What's this Devillery you are talking about. Hell is your first stop :evil:
     
  6. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester

    Goes to get wooden stake and silver bullet.
     
    winjim likes this.
  7. OP
    OP
    winjim

    winjim Iron pony

    Bike gets used every day. I don't have time to rebuild the wheel with a baby to look after. I'm replacing the groupset literally piece by piece as I get five minutes here and there but need to keep the bike rideable as I do it. I'm currently sat in the park on my lunch hour filing cable outers smooth since I know I wont have time when I get home. Currently the bike has a disconnected left brake/shifter, Campag triple crankset and mech limited to middle ring, Sora rear mech and cassette. So about four useable gears but enough to get me home:smile: .
     
  8. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    Excuses excuses. You are not going to heaven, ever ever never :hello:
     
  9. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    Baby. Get it holding the tools. Wait till you get a teenager. They won't help.
     
  10. OP
    OP
    winjim

    winjim Iron pony

    With her tiny little hands she should be good at the delicate jobs. I'll get her to thread the cables through the shifters.
     
  11. fossyant

    fossyant Ride It Like You Stole It!

    Location:
    South Manchester
    Train them young.
     
    winjim likes this.
  12. Smokin Joe

    Smokin Joe Legendary Member

    I'd say no.

    Very definitely no.

    Not a prayer.
     
  13. OP
    OP
    winjim

    winjim Iron pony

    This one's for you
    20151016_174415.jpg
     
  14. Smurfy

    Smurfy Naturist Smurf

  15. OP
    OP
    winjim

    winjim Iron pony

    I need an 8sp cassette for it to work properly (sprocket pitch 4.8mm). I think I'm going to try the above bodge and see if it works. I think even if I can only get five sprockets indexing properly, I should be able to use two of the chainrings (it's an SS mech so using the full triple's out of the question) which will give me ten useable gears which should get me by. If I can stretch it to fourteen that'll be awesome.

    Or I stick with the current left ergo / right sti setup just to annoy @fossyant :evil:
     
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