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need help with 105 shifters: are there three shift points?(7 posts)

need help with 105 shifters: are there three shift points?thejerseydevil
Jul 17, 2002 12:44 PM
I have 105 shifters with an ultegra double crank. i thought at first that there were two shift points, one click for the granny and one click for the big ring. however, i noticed a third spot when i had noise in the big ring, larger cogs. it seems that if i use the top four cogs with the big ring, i have to depress the left lever and it shifts down the front derail. a bit, but not enough to go to granny.

is this normal? is there a way to adjust the front derail. so i dont have the use this middle shift point so often (i have to click down if i use the largest 4 or 5 cogs in he the big ring, or up if the lower 4 or 5 cogs)?
re: need help with 105 shifters: are there three shift points?fracisco
Jul 17, 2002 12:48 PM
This is normal. It's to reduce the drag on the chain from the front derailleur when you are far across the chainline (e.g. small chainring, small cog; big chainring, big cog). It's like a half-shift point, and I encounter it only if it is the extreme 2 - 3 cogs. Beats the noise and drag.

I don't know if you can adjust the derailleur so that you don't have to occasionally use the half-shift point.
re: need help with 105 shifters: are there three shift points?thejerseydevil
Jul 17, 2002 12:52 PM
i have to use it for about 4 or 5 cogs. is there a way to adjust to reduce this to 2 or 3? cable tension or limits?
Ready for this?grzy
Jul 17, 2002 5:19 PM
There are really five shift points depending upon how you count them. For 105 and Ultegra the same shifters are used for both the double and the triple setups. So they can all handl three chainrings (we're talking 9 speed here). Now the two smaller chainring positions each have a half shift towards each other for trimming when the chain angle is high. So three shift points and two half shifts. You use the two lower positions with a double, but you'll often see it setup incorrectly such that there really aren't any apparent half shifts.

The trick is dialing it all in and I'm not even about to go into the details of this. Go play with your stuff for a while and see what you can figure out on your own. Remember: limit screws are for limiting the der. travel only and cable adjustment is for dialing in the gears.
Ready as ever...thejerseydevil
Jul 18, 2002 8:52 AM
thanks for the details. i will play around and see if i can get it dialed better.

just to make sure i have it, i want one half shift point for the double.
Ready as ever...grzy
Jul 18, 2002 6:16 PM
Nosir, you want to be able to do one half shift up from the small chain ring and one half shift down from the large chainring. Probably the best way to sort all this out is to loosen the cable at the deraileur and hold it with one hand while working the shifter with the other hand. Play around with it a bit and you'll start to see it. the half shift thing is a little subtle and many people don't even know it exists.
much thanks! (nm)thejerseydevil
Jul 19, 2002 5:17 AM