|Campy shifting question||PaulCL|
Mar 19, 2003 9:12 AM
|Why does my record 10spd shift perfectly in the workstand, but not on the road?? Its' been driving me nuts.
Here's the deal: On the road when shifting from the 21 to 19 sometimes the chain drops right away, sometimes, not at all, sometimes a few seconds after the shift. Same with a few other shifts. My poor ergobrain is having fits. Any suggestions on adjustments I can do??
I've tried adjusting cable tension but to no avail. I could readily fix this in the workstand, but in the workstand, it shifts perfectly everytime. Why not under load???
Mar 19, 2003 9:29 AM
|Sounds like a case of excessive cable friction. Try lubing the cables. I use the same 4/1 mix of mineral spirits and synthetic motor oil that Ii use for my chain.
Every 1000 miles or so I hang the bike from it's rear wheel and dribble some lube onto the cable near the head tube so it will run toward the brake levers.
Also clean and lube the BB cable guide and the short cable near the rear derailleur.
Also lube the derailleur pivots.
Mar 19, 2003 9:52 AM
|Thanks. I'll try it tonight. I use the silcone based "Tri-Flow" on my chain. Should I use that, or I mix up a batch of your 4/1 motor oil mix???|
Mar 19, 2003 10:19 AM
|Whatever you use, it has to be thin or it won't run down the cable. Another good lube it Pro Link, but I don't think it's any better the the homemade stuff.
As for the mix, 3/1 would leave a bit more oil. You don't need to mix a big batch. I mix it up in an old water bottle and dispense it with an old Pro Link bottle. A needle-point oiler is even better.
|re: Campy shifting question||Leroy|
Mar 19, 2003 10:20 AM
|One suggestion along with lubricating the cables - make sure the ends of the shrouds-cable housing - are smooth. If the cables have something to snag on it may affect shifting.|
|And another thing||Kerry|
Mar 19, 2003 4:45 PM
|Depending on how many miles/months you have on the shifters, they might benefit from having a "sluice & lube" to remove gunk & grit. If you squirt a thin lube in there (ProLink, TriFlow, home brew) while shifting up and down through the gears, you often see a rejuvination in shifting. Also, if it shifts quickly in one direction but slow in the other, this suggests an opportunity for simply giving a quarter or half turn of the barrel adjuster.|
|re: Campy shifting question||DINOSAUR|
Mar 19, 2003 10:32 PM
|I always take my bikes for a short spin and adjust everything under load, they work differently than in the garage. My cables did not stretch until around 2,000 miles and after that the Campy stuff has been flawless. Sounds like you need to tighten the down tube barrell adjuster about 1/8 of a turn at a time until it shifts with no hesitation. Also make sure you don't have a crimped cable. I installed new bar tape once and put it on too tight and crimped the rear der cable and it was doing all kinds of funny stuff. Also check and make sure the rear der cable fixing bolt is tight....|| |