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Ultegra chain-line questions, noise?(8 posts)

Ultegra chain-line questions, noise?Spex
Aug 8, 2002 6:39 AM
I was perusing the local dealer and tested a bike that had Ultegra components throughout. I noticed that while shifting through the cogs a scraping noise began on the smallest cogs (nine speed x 2). I expected to see the chain rubbing on the front derailleur but it wasn't. It was scraping against the inside of the large chain-ring. Does this mean the bike needed a wider bottom bracket or spindle? Please educate me, thanks.
Short answer is - "Yup."Spoke Wrench
Aug 8, 2002 6:50 AM
Check the archives. This is a topic that seems to be coming up every week or two.
It's everywhere!scottfree
Aug 8, 2002 8:31 AM
I fixed mine with a couple of spacers at the BB, as I believe Spoke Wrench recommended. The 'more elegant' fix he recommended is a wider bottom bracket (XTR?), which I might do a few thousand miles down the road when my BB craps out.
welcome to the world of Shimanotarwheel
Aug 8, 2002 10:52 AM
This is a design flaw inherent to Shimano.
Ultegra maybe, not Shimano (nm)Chen2
Aug 8, 2002 11:55 AM
re: Ultegra chain-line questions, noise?qui-gon jin
Aug 9, 2002 8:47 AM
I had the same problem. I have not heard of any problems with other levels of components, just Ultegra. It is a very annoying problem. I looked for an easy fix and tried flipping the inner chain ring. It now works perfect. I am sure the XTR BB would fix the problem, but this was the cheap and easy way. A small adjustment of the front derailleur was all that was need. It shifts great and really, I cannot tell a difference in performance (except that I can utilize all the gears now).
re: Ultegra chain-line questions, noise?clintb
Aug 10, 2002 3:08 PM
Just to throw in some info.

I have a 2001 TCR Zero, which everyone know has very short chainstays, and it doesn't have any problem with chain rub (maybe a tiny bit on 39x11). It's outfitted with full DA though, but I'm sure the width of the Ultegra and DA BB's are the same.

Could there be a decent amount of frames that aren't aligned that well? Not likely, but just a thought.
Nope.Spoke Wrench
Aug 11, 2002 6:10 AM
Too widespread. A problem that comes up on this board every week or so is going to be something something other than frame misalignment.