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Ultegra Front derailleur adjustment problems.(7 posts)

Ultegra Front derailleur adjustment problems.thefish
Aug 7, 2003 11:54 AM
I have a Ultegra double ....when I'm on the larger of the two rings ...there is no rubbing of the front derailleur. But, when I shift into the smaller ring the derailleur rubs when in the smallest and largest rear cogs. I've tried to ajust the inner "L" screw to no avail. It just so happens that when I screw it in/out the chain will rub more on one side than the other. Should I try to adjust cable tension(It shifts perfectly though) or should I try adjusting the "R" screw? Or should I adjust the rear derailleur (also shifts perfectly)?
re: Ultegra Front derailleur adjustment problems.Wesman
Aug 7, 2003 12:17 PM
You shouldn't be in small front/small back or large front/large back. Those combos and even 1offs on the back cause too much wear and tear on the teeth and chain.

Adjust the F.D. plate with the back in the large cog and the FD in the small ring. Then switch to the big ring and small cog and adjust the plat again. After that you should be all set.

Small ring and smallest cog can be found by switching to the big ring and cog somewhere in the middle. i.e. there are lot's of duplicates (or close enoughs). For example, I never use the small ring with the smallest 3 cogs nor do I use the big ring with the largest 3 cogs.

Both are new posters........................nmMR_GRUMPY
Aug 7, 2003 12:34 PM
What's THAT supposed to mean?Wesman
Aug 7, 2003 4:44 PM
What's THAT supposed to mean?thefish
Aug 7, 2003 6:02 PM
I will try your method for that other poster is ur problem man, I'm just trying to learn something. I f I stepped all over you when you tried to learn something u'd probably dumb....really dumb.
re: Ultegra Front derailleur adjustment problems.maximum15
Aug 7, 2003 6:15 PM
You might want to pick up a copy of Zinn's art of roadbike maintenance. This will help prevent you from making derailler boo-boo's (one big one is adjusting front derailers -- they rarely need adjustment after being set up correctly). Depending on your bikes geometry (chain stay length), rubbing will be more or less pronounced as you cross chain. Don't cross chain if you can help it.
Nonsense...Lone Gunman
Aug 8, 2003 5:00 PM
If shimano built a product that allowed the rubbing noise you describe, they would not be the largest seller of components on the planet. Something is not right, my ultegra stuff never rubs. Are you using the trim feature of your left shift lever, you know the sort of half shift that moves the derailleur over a few mm's to allow the cross chain combination without rubbing the cage on the low range gearing?