I am 6 ft 6 (about 1m 96cm). I have read on various web guides that this means a frame size of 22 inches plus. That would seem to rule out Bike Friday and Montague. I'd like a bike for the commuting, and for riding up and down the South Downs like the gormless beginner I am. I'm not sure I'd like to do the South Downs on a Brompton. Any tips?