Join Date: Oct 2008
Location: Frankfurt, Germany
Bikes: Focus trash find commuter, Eddy Merckx Corsa, BP Stealth TT bike, Leader 720 TT bike, Boardman Comp Hybrid drop bar conversion, Quantec CX budget cyclocross build, SerottaNOS frameset ready to build up!
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Campy 8-speed Ergo drivetrain, Shimano 7+1 cassette, slight shifting problem.
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: