front derailleur help
09-04-20, 06:17 PM
#26
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09-04-20, 06:33 PM
#27
Senior Member
As how it is fine now - we can only guess until and if OP provides an update
09-04-20, 06:39 PM
#28
Senior Member
Thread Starter
it seems to shift fine but if you say it is the wrong shaft i'm sure you must be right . as I said I was surprised that the long side didn't work on the shaft. I will contact the man that has all the Claud Butler answers and will get back to you.
09-04-20, 06:50 PM
#29
Senior Member
Some modern cranks have crazy long chainline like Shimano GRX 11s which I tried to use with CX70 FD and also had to back out limiting screw but it worked just fine.
By going with shorter spindle you'll get narrower q-factor, probably improved chainline (so less wear and probably less noise) and operating FD not at it's limits
09-04-20, 07:08 PM
#30
Senior Member
Thread Starter
guys it is shifting just fine I will contact a person in england that has rebuilt 100 of these bikes and see what he thinks . but I have ridden this bike at least 100 miles and it works so i'm ok. thank you I will tell you what the Claud Butler guru says.. Scott
09-04-20, 07:31 PM
#31
Senior Member
Let us know what your contact says. People's recommendations in this thread are not Claud Butler specific, spindle length and chainline are pretty universal and that's why good folks of bikeforums were able to quickly narrow down your issue.
09-04-20, 07:38 PM
#32
Senior Member
Thread Starter
Likes For Ger482:
09-04-20, 09:04 PM
#33
Senior Member
here are the measurements all is good here is my thread
https://www.bikeforums.net/classic-v...-butler-3.html
https://www.bikeforums.net/classic-v...-butler-3.html
As mentioned by others, it definitely seems that a too long spindle for the crankset used was installed at some point. The crankset looks to be a Shimano 600 Arabesque, if that is indeed the case, the correct spindle length is 116mm.
09-04-20, 09:24 PM
#34
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Thread Starter
09-05-20, 12:08 PM
#36
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There is no "perfect" chainline anyway, because it depends on how the rider sequences their front and rear shifts, and on how much time they spend in which particular combination of sprockets.
I tend toward a shortest-possible chainline because I prefer not to have to shift down to the small chainring frequently, so ideally my large chainring is more centered with the freewheel than the small chainring. I do find a lot of variation though on bikes that I take in, and tend to shorten the spindle eventually (or perhaps change to a symmetrical spindle of the same length).
It's just me though, I find it near-impossible to get used to a double crank setup with a long chainline dimension.
I tend toward a shortest-possible chainline because I prefer not to have to shift down to the small chainring frequently, so ideally my large chainring is more centered with the freewheel than the small chainring. I do find a lot of variation though on bikes that I take in, and tend to shorten the spindle eventually (or perhaps change to a symmetrical spindle of the same length).
It's just me though, I find it near-impossible to get used to a double crank setup with a long chainline dimension.
