Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Senior Member Barchettaman's Avatar
    Join Date
    Oct 2008
    Location
    Frankfurt, Germany
    My Bikes
    Focus frankenbike trash find commuter, BP Stealth carbon monocoque TT bike, Leader 720 tt, Quantec CC Cyclosross build, Eddy Merckx Corsa Extra Columbus SLX road bike
    Posts
    1,046
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Campy 8-speed Ergo drivetrain, Shimano 7+1 cassette, slight shifting problem.

    Hi all.

    I have restored an Olmo with full Campy 8 speed (Ergos) drivetrain.

    To ease the load on the wallet a little, instead of buying a Campy clincher wheelset I used a Shimano wheelset with a 7 speed 13-23 Shimano cassette, plus a 26 tooth 7-speed sprocket and spacer. AFAIK this should all work perfectly because the spacing (sprocket+spacer) of Shimano 7- and Campy 8-speed are the same, 5mm.

    Everything works fine, apart for one thing. In the small chainring (39) the 4th sprocket skips. Above and below it, all is well.

    I realised the FD was rubbing slightly on the chain (I hadnīt trimmed it properly, not used to Campy) and that got things a little better, but it still ainīt perfect.

    So to recap, on the big ring all is well. Likewise, on the small ring - bar the skipping 19-tooth sprocket. The RD shifters smoothly in both directions and seems well aligned. The chain is the correct length.

    Any ideas, anyone? I want to try and avoid making it any worse!

    Hereīs a pic taken before I put the chain and cassette on:


  2. #2
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    Location
    an imposter living in the 35223
    Posts
    5,626
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    1. Campagnolo recommends that in setting up the shifters you start in the 'middle' cog in the rear (on 8s that'd be #4 from the small end), and set the derailleur/cog alignment to be perfect on that cog. It's worth a shot if you didn't do it this way.

    2. Which rear derailleur are you using? When I tried setting up 8s Ergo using the earlier Chorus model with the A/B adjustment I was never happy. It all went smoothly when I bought the next version. Your's looks newer, but I can't really tell.

    3. My 8s setup was also happier with a Campy C9 chain than the SRAM 8s I started with.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 620 (nee 600)____ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/blue)__02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

  3. #3
    Senior Member Barchettaman's Avatar
    Join Date
    Oct 2008
    Location
    Frankfurt, Germany
    My Bikes
    Focus frankenbike trash find commuter, BP Stealth carbon monocoque TT bike, Leader 720 tt, Quantec CC Cyclosross build, Eddy Merckx Corsa Extra Columbus SLX road bike
    Posts
    1,046
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    1. Ah, ok, didnīt know that.

    2. No idea, this is the first bike I have had with Campy.

    3. It has a 6/7/8 speed KMC chain with a quick link. I have cleaned and relubed the old Campy chain but a) putting an old chain on a new cassette is bad practice AFAI am aware, and b) I would like to keep the KMC on if poss.

    Thanks for the quick reply.

  4. #4
    Senior Member Barchettaman's Avatar
    Join Date
    Oct 2008
    Location
    Frankfurt, Germany
    My Bikes
    Focus frankenbike trash find commuter, BP Stealth carbon monocoque TT bike, Leader 720 tt, Quantec CC Cyclosross build, Eddy Merckx Corsa Extra Columbus SLX road bike
    Posts
    1,046
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Ex Pre, I think I know how to set up the 4th sprocket, but can you talk me through it anyway?

    Do you set up the small sprocket first, click up to the 4th, see what it's like, if it's not perfect relase the cable tension, then move the RD inboard/outboard on the small sprocket, retension, click back up and check again? Or am I being an idiot and missing a more obvious way of doing it?

    Thanks in advance

  5. #5
    Member
    Join Date
    Sep 2011
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Also in addition often times you'll see it skipping or chattering in the middle gears when the tension is slightly off on the derailleur.

  6. #6
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    Location
    an imposter living in the 35223
    Posts
    5,626
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    You should already have your limit screws pre-set. Go ahead and start on the small sprocket. Before you tighten the cable, give yourself a little 'wiggle room' on the adjusting barrel - turn all the way in, then back off about 1/2 turn. Then you can pull the cable tight and tighten the clamp bolt. Click on up to the 4th cog. From here you then use your adjusting barrel to get the derailleur lined up on the sprocket perfectly. Shift it up and down, recheck your limit adjustments, your b-screw position, and if all is well this accomplished something. Good luck.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 620 (nee 600)____ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/blue)__02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

  7. #7
    Senior Member
    Join Date
    Oct 2008
    Posts
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    OP, can you update us on how this turned out? I'll be finishing off a build with a very similar setup, and am curious if you got this to work.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •