[BhamBike]

I am about to change out my 105 rear and Tiagra front for, Dura Ace and Ultegra respectively. Will undoing the cables during installation change my indexing? I am afraid that the perfect shifting sweet spots will move, and the front will rub. If so, what do I need to do to "reset" and re-sync the shifters/derailleurs?
Thanks

 

[Al1943]

Indexing

The index spacing is set in the shifters, not the derailleurs. Go to http://www.parktools.com and read the instructions for attaching cables and adjusting derailleurs, it's really quite simple. If you are installing new shifters the Shimano instructions will answer your questions.
~Al

 

[Saddle_Sore]

Changing Indexing on F. Derailleurs

You could also go to http://www.sheldonbrown.com/gearing/index.html since he has written a pretty good article on getting your gears to work properly. I'm wrestling with a bike that I am building and am having to convince some old Shimano 600STI shifters to work with an 8-speed cassette - it is proving difficult, but gives me an excuse to go faff with bikes in the garage!