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ultegra triple chain ring shift problem(7 posts)

ultegra triple chain ring shift problemzeke
Nov 14, 2001 4:36 AM
when i shift my ultegra triple from middle chainring to small chainring i must click twice, or push very hard once.

even if i push hare, the front derailleur clicks (loudly) twice into position on the small chainring.

it seems unusually loud when it does finally move into position. ie unusual when compared with the movement from largest chainring to the middle chain ring.

this happens no matter what cog i am in.

is this normal or is an adjustment in order?
re: ultegra triple chain ring shift problemPbOkole
Nov 14, 2001 5:13 AM
This is normal. In the shifter, for the middle chainring, there is a trim tab built in to allow you trim the derailleur to use almost every rear cog from the middle ring. When you shift to the large ring, there is no such tab. EXAMPLE: From the big ring, you click once and you are on the middle ring at the outside tab. One more click will put you onto the inner tab for when you shift to the bigger cogs in back. One more click will put you into the small ring.
re: ultegra triple chain ring shift problemzeke
Nov 23, 2001 5:48 AM
thanks for the response. i tried to adjust, without any change. your explanation now solves the problem.
re: ultegra triple chain ring shift problemLittle Pooter
Nov 14, 2001 6:31 AM
I am speaking from my experience with 105, which I think is very close to Ultegra. The front shifter has two clicks for the middle chainring. What this means is that when you shift from the big ring to the middle, the derailler moves to a position to handle all the cogs from 12 to roughly 18 or 20. Beyond these cogs (18-25)you will get chain rub on the derailler plates. At this point you can drop the front derailler to a secondary middle position that will accommodate the 15-25 range in the rear. From this secondary position, it will drop to the small ring quite easily with a single push of the release trigger. To drop to the small ring from the higher middle position requires that you push the release trigger harder and further to get it to drop past the secondary middle position down to the small. This is a little louder and not as smooth, but perfectly normal. This is a great system to allow you to "trim" your front derailler to avoid chain rub in the middle ring. I wish MTB's would still use this system. My first XT RapidFire Plus system had this feature, and it worked great, but later systems went back to one click for each chainring.
Hope this helps.
re: ultegra triple chain ring shift problemzeke
Nov 23, 2001 5:50 AM
thanks for your detailed response. it is now clear to me. it would have been good if shimano had included such an explanation in their instructions!
re: ultegra triple chain ring shift problemChen2
Nov 14, 2001 7:04 AM
Also consider replacing the front shift cable and maybe the housing with it, especially if they are getting old. If your bike is new, the shift cable might have too much tension, but that's unlikely. Check the routing of the cable through the guides, probably on the bottom of your bottom bracket.

These shifting and trimming problems are why I prefer a double. But triples are really good when you need them.
re: ultegra triple chain ring shift problemzeke
Nov 23, 2001 5:51 AM
thanks for your response. the bike is very new, that is why i am unfamiliar with the trimming setting. i will however check the routing of the cables.

also, yes triples are wonderful, and i do need them in this hilly area.