Originally Posted by
Gege-Bubu
The local shops I've been normally have a guy who ask me to hop on seat, then he steps aside, look at me, saying : "That's too big" or "That's too small, let me get more expensive bike for you"
But this shop "roll:" has some kind of geek measuring system.
An experienced guy in a shop can see imediately if the frame is the right size just by looking at you on it. The geek bit allows him to fine tune things like stem length, seat position, cleat adjustment and the angle of the brake hoods so they are comfortable for you. From there you will be basically comfortable but will probably make your own adjustments after riding for a while.