My rule of thumb is to err on the small side. Otherwise you might end up with a very short stem or a higher riding position at the front than you would like. If you like your stem and bars 'slammed' low pay attention to the head tube length which is much taller on the medium sized frame.
My rule of thumb is to err on the small side. Otherwise you might end up with a very short stem or a higher riding position at the front than you would like. If you like your stem and bars 'slammed' low pay attention to the head tube length which is much taller on the medium sized frame.