Originally Posted by
soliver
Hi there! I've got a bike which was custom made and its 52cm and I'm 5'8''. After that first road bike I have always choosen the same size for all road bikes I then adquire for racing.
I don't think you will be comfortable on that size. Avoid purchasing at a first sight, first try to figure out what's your size according to what says a real advisor. Based on my experience I think you should try 48cm, otherwise go to a specialize custom frames builder and let the guy advise you once you ride the prototype they have in their factory (simulate your going to buy a frame

Cheers.
So you're saying to find a custom frame builder, a guy who's probably just getting by or working another job to pay for his bike-building habit, lie to him about your intentions, take up a bunch of his time and get the benefit of his expertise, then just walk out and buy the bike somewhere else? Nice.