Quoted message said:I had my LBS tune my Trek 2300 /Ultegra triple and I'm not a happy
camper.When I originally took it in, I mentioned the front der wouldn't
trim
Quoted message said:properly but otherwise everything was fine. (I told them the large
ring/small cog combo chain hit the outer part of the cage.)
Could be a definition problem. There is no "trim" function in the large
chainring on an Ultegra triple; it only has one position. The middle and
inside (small) chainrings are the only ones in which you can "trim" the
front derailleur.
Quoted message said:Of course, when I picked it up it was raining like a bear so I didn't get
a
Quoted message said:chance to ride it and check it out.. The next day I noticed it still had
the
Quoted message said:same problem and front der had the little bit of slight film on the der
pivot points, exactly like when I took it on. I wasn't convinced they did
anything.
Pivot points on a derailleur don't usually need much (if any) lube during a
normal tune-up. If anything they might need to be wiped down.
Current-style front derailleurs rarely, if ever, display wear or have much
friction on their pivots. OK, the short story- I don't think the lack of
lube evidence on the front derailleur is an indication of the overall
quality of the tune-up.
Quoted message said:I took it back to the shop and wanked about it. They mentioned the first
tech had to leave and passed it to someone else to finish and something
must
Quoted message said:have gotten overlooked. So, the chief tech threw it in a stand, putzed
around for a few minutes and pronounced it ready. I took it for a quick
spin
Quoted message said:and pronounced it NOT ready. Basically, for each front ring I had about
3-4
Quoted message said:rear cogs that were usable without chain noise from hitting either the
inner/outer part of the cage.
For the inside & middle chainrings, 3-4 gear changes before needing to trim
the front derailleur would be about right. But if you're saying that you're
unable to get rid of chain/derailleur scraping in the middle & small
chainrings even after trimming... then it's not set up properly.
Quoted message said:When new, I don't remember any chain noise that couldn't be trimmed out,
even with severe cross chain combos. (I didn't cross chain but COULD have
without chain noise.)
Chain noise is almost always going to be quieter on a new bike, due to the
heavy lube that comes on the chain.
Quoted message said:Am I expecting too much from the LBS? Is tuning an Ultegra triple that
difficult? Anyone recommend a quality shop in the northern Detroit burbs?
The Ultegra triple with STI requires a bit more than just a by-the-book
technique for adjustment. It takes a while to get the hang of how
everything interacts, and to get away from the idea that cable tension isn't
something to pay much attention to (when it's in the small front chainring).
But it's not rocket science either, and a mechanic who has set up a number
of them should have a pretty good feel for how it works.
It *is*quite different from the double version, because there's no trim
adjustment for the largest chainring (which the double does have).
But I still don't have enough information to evaluate what's really going on
here, since you implied that the derailleur doesn't trim properly in the
largest chainring... and in reality, it doesn't trim at all in that
position. And I'm also not sure what you're saying about its ability to not
make noise in more than 3-4 rear cog changes (specifically, whether that's
the case with or without using trim).
-
--Mike-- Chain Reaction Bicycles
http://www.ChainReactionBicycles.com