Message:
>Is it possible to upgrade a Specialized Allez with Tiagra rear derailleur and remaining components being Tiagra to a 10 speed?>What are the minimum components necessary to complete the transition? Would an Ultegra cassette, chain and right shifter get the job done or would more or less components be adviseable?
The best part about the new 10 speed components is the crankset. Also the new 10 speed shifters, chain and cassette are quite expensive. I would just upgrade the crankset and replace the other parts when they wear out as someone has already said.