Hello all, this my first post, be gentle! I have a question on frame sizes, as I am intending to buy a crossrip, jake or threshold style of bike, I have been checking out local shops without much success. Iam 6"6, and it seems not many XL frames are imported to Australia. None of my local shops have any sizes for me to try, telling me that the large will fit if we put a long stem, swept back seat tube etc. Is this a legitimate way to change a frame sizing or should I go to City shops and buy the first big frame I see. Thanks( in nervous anticipation)