Join Date: Feb 2006
Location: 100 miles north of Los Angeles
Bikes: 5 Colnagos, Harry Quinn...
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Typically when you are shifting the chain on the rear cassette, your chain is obviously in a different position or angle, when it is on the small cog as opposed to being on the largest cog, so it may end up rubbing on the front derailleur after a shift. In order to accommodate the varying angles, your front derailleur needs to be able to make minute adjustments. With friction shifters, when you adjust the rear derailleur, if the front ended up rubbing after the shift, then you would just make that minute adjustment. It's really no different with your shifters. The chain angle still changes, hence there may be a need to adjust the front one by clicking it over once. So if your front derailleur is all the way to the left and you want to shift to the larger chainring, you may have to go two or three clicks to get to the big one. Is it normal? Yes. If you didn't have those minute adjustments, it would rub a lot, driving you nuts and wearing out your derailleur unnecessarily.
In 25 years of riding I've never liked that aspect of shifting myself, whether I'm riding my vintage friction shifter equipped ride or my Ultegra equipped ride. The only shifter that has accommodated this issue in the past that I am aware of was manufactured by Suntour. It mounted on the downtube, but not on the typical sides of the downtube. Instead, it mounted right between the two mounting points on the down tube. It was a novel idea that included a cam of some sort that acted when the rear shifter was moved hence moving the entire body up or down on the downtube
by only a fraction of an inch hence loosening the cable or tightening it thereby making up that minute adjustment. Here's the shifter
. Hard for me to explain. Probably even harder to understand. In any event there may be something now that works in the same way.