Originally Posted by WheresWaldo

Frame geometry is what it is, and cannot be changed by changing components. Frame fit can be changed by use of components. They are too very different concepts. And yes, frame geometry does matter. As an example look back a few years at Cannondale, before the CAAD frames, they had a Crit bike whose geometry made for a very jittery feeling bike, no amount of component changes could tame her. Look at the old Trek 520 and compare it's geometry to the CDale Crit, very relaxed and no amount of component changes could make her more lively. But component selection in either bike would make that bike a perfect physical fit for a rider, even if they could not handle the twitchiness of the Cdale or the go to sleep while riding feeling of the Trek.