Originally Posted by
globecanvas
OK, I know I'm talking to myself which is lame, but the 90mm stem makes a world of difference. Short version, Tarmacs are sized big, the size 54 has an effective top tube length of almost 55cm.
I'm also 5'9'' (and 3/4's...) and I have a 54cm tarmac, with a 90mm stem. Fits great.