Hello to all. I just moved to san francisco and after discovering the unreliability of the bus have decided to start communting via bicycle. I am trying to make my run down huffy (laugh if you must but i dont havre the scrill to throw down on anything right now) into a fixie. I hope to learn a lot here. my first question is...the bike has 26" skinny tires, will a set of 700c fit, or will they rub?