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three shifting points for double with 105 shifters?(3 posts)

three shifting points for double with 105 shifters?thejerseydevil
Jul 17, 2002 11:25 AM
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: three shifting points for double with 105 shifters?cycle63
Jul 17, 2002 1:46 PM
I'm not too sure about the 105 double but I used to have a 105 with triple crank that did that. The LBS said that Shimano did that to remedy exactly what you described for helping to get a better alignment and less noise with the chain hitting the front derailleur depending on which cog you were on in the back.
Like I said before though, they did that on the triple but I couldn't tell you about a double setup.
4 indexed points on front derailleurTig
Jul 17, 2002 4:28 PM
There are 2 index points per chainring on a double. It sounds like yours is already set close to correct, but I'd have to see it in person to know more. Sometimes setting a front derailleur to work just right in 8 of the possible 9 gears can be a pain. You want to have to click to the corresponding index when shifting across somewhere near the 5th cog. I cheat the adjustment range by slightly spreading the thin derailleur plates with pliers. If in doubt and you are having problems, take it to your LBS.

Here's Park Tool's excellent online help for front derailleur adjustment:
http://www.parktool.com/repair_help/howfix_frontderailleur.shtml