its isis, and i feel like i have a larger bb in there already. i think ill just throw in my 07 105 crankset and its a tripple so ill try and make the chainring issue work with chainring bolt spacers from harris cyclery (sheldon brown's site). and yeah, im a mechanic at a very good shop, but im really new school and havent been working on bikes other than my own (and a few friends and family- but nothing for $$$) until about a 8 months ago. im rather good at external bb's and deraulliers and stuff that i used to build my own bike. but im new to older style parts (im only 19) and though i had a purple track bike when i was about 8 ive never really worked on em until about 9 months ago when i got mine.