Hey all I've done some searching on this site and found answers to most of my questions but I had a few more. I have an older Fuji Allegro 12spd that I would like to upgrade to 8 or 9 speed with STI shifters. The bike currently has 27"wheels but it looks like there is enough play in the brakes to use 700c wheels. I'll probably get a 9 speed upgrade kit that would include Shift/brake lever, cassette, rear derailleur and chain. My question is will I need to replace the front derailleur and crank or will what I have work? Thanks in advance.