I have a 1970's Peugeot 10 speed that I'm using solely on the trainer. The Spinervals programs call for lots of shifting from large to small chainring. As this bike has a front friction shifter, sometimes it's a pain to go back and forth. I'm wondering if it's possible to install an indexed shifter on this bike front only. I doubt I'll use this outdoors again so I don't really care how/where it's mounted. The bike originally had down tube shifters that I replaced with stem ones for ease of use.
Thanks for any suggestions.