Hi there guys!
To make a long story short, I recently purchased some shimano 7900 10 speed indexed barcons on ebay, hoping to upgrade my Miyata touring bike for an upcoming trip. As bad luck would have it, I found out after they arrived that shimano has dropped friction shifting from its most recent series of barcons.
I've decided to stick with the barcons, because the drivetrain is in need of some modernization, but I am trying to do it on the cheap.
I currently have a full RSX setup. 3x7 brifters, RSX FD and RSX long cage rear derailleur.
If I buy a 10 speed (11-30) tiagra cassette and 10 speed chain, will I be able to use the RSX long cage rear with everything?
Does older RSX gear have the same pull ratio as current 9/10 speed shimano road components?
Alternately, can anyone recommend a cheap way of upgrading my system?