I have a 7 speed that I'd like to upgrade to 10 speed, all depending on cost. Currently has 52/39 Shimano 600 cranks (early 90's bike).
- If I already have 10 speed shifter (ultegra SL), rear derailer (ultegra), 10 spd chain and cassette (105), can I just run my current cranks (originally 7 speed bike)? Would I need to change the FD?
- Also, if I wanted to change to compact spending as little as possible, can I run the new Tiagra compacts (FC-4550) or do I need something "designated" for 10 speed?