ive an opportunity to get a very nice sentimental retro 1970's road bike steel frame...but am a mountain biker and have not clue on road bike sizing. Can anyone help me. Its really very special but 22'' ST c-t and 22'' TT c-c with 73deg seat and head angles...with an 80mm stem...will I get away with it. I'm 172cm (5'7-8'') and quite leggy, inside leg just under 32''. thanks all. t