Hi, im thinking of upgrading from Tiagra 9 speed to 105 on my Trek 1.5 when things start needing replacment, but i have a couple questions re compatability that hopefully somebody might be able to answer for me?
1) My Trek currently has a Shimano sealed Cartridge Bottom Bracket but the 105 cranks that i looked at come with a hollowtec 11 BB. Is this BB compatible with the size & Threads on the frame? If not can the 105 crankset be fitted to my cartridge BB?
2) Obviously i will need to fit a 10 speed cassete but will this fit directly onto my Hub or will a new hub/wheel be required as well as this is another cost that needs to be dealt with?
Thanks in advance for any advice