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Request help W/Ultegra Triple Crank noise(6 posts)

Request help W/Ultegra Triple Crank noiseDorf411
May 30, 2003 6:02 PM
Hi,

I have a new bike which has an Ultegra Triple crankset which clicks when in the middle (42T) chainring but not the small or large rings. I noticed it when I purchased the bike and the shop made a stellar effort to make it stop but couldn't. Together we decided it had to be the many square shaped pins that assist in shifting from the 30T to the 42T. I pretty much expected that it would take little or no time for it to wear down a bit and stop making noise. It still clicks and I was wondering if anyone else has experienced this on other triple cranksets. Does anyone have an idea for a solution? I have come up with a couple potential options. Replace the chainring with one that has no pins, file or grind down the pins, or just live with it. Any ideas? Thanks

John
Hmmm.Spoke Wrench
May 31, 2003 5:00 AM
Since it has done it since the bike was new, I'm going to guess that it's a set up problem.

STI triples can be a pain to get working right. The position of the derailleur on the seat tube, limit stops and cable tension all have to be near perfect for it to work right.

Ultegra triples generally work just fine with all of the shifting aids in place. Grinding them down sounds to me like an expensive experiment that isn't likely to work.

When there's a problem, it usually has to do with the positioning of the derailleur. After people have been "fussing" with adjustments for a while, I've had the best luck by disconnecting the shift cable and putting everything back to the default position.
Hmmm.Dorf411
May 31, 2003 6:42 AM
That has all been done, the derailleur isn't touching the chain or rings at all in the middle position. They even tried a new chain. I may have an old 42T in the garage that may work for a test to confirm it is the chain ring. That would be a start.
ClicksChen2
Jun 1, 2003 3:10 PM
Are you sure the click is in the drive train? The last click I had turned out to be the saddle. I was just about the pull the bottom bracket. I've had clicks that were caused by the chain or by loose spokes. One click turned out to be my left knee cap. A well adjusted Ultegra triple shouldn't click. I surely would not start grinding pins or anything else.
~Al
Possibly fixedDorf411
Jun 1, 2003 5:44 PM
Today I swapped a cheap Tiagra chainring for the suspect noisy 42T and it seemed to quit making noise. After this I carefully filed off a small amount of metal from each of the four pins of the 42T chain ring. Now it seems as thought the clicks are gone and it still shifts fine. Really, the worst that could happen is that I have to replace the middle ring. Will know better on an extended ride this week if this corrected the problem.
Possibly fixedSpinney
Sep 3, 2003 11:02 AM
I have the exact the same problem you describe.
The bike shop I bought the bike from said the problem is in the design of the middle gear, and is not causing anything to wear prematurely, but I still find it annoying, and would like to get rid of it. Did the filing solve the problem?