Originally Posted by iamlucky13
. Generally for someone of your height a Large or maybe an X-Large frame size (18-20 inch or 46 to 52 cm) ends up being the best fit. A bike that isn't the right size will be less comfortable to ride.
188 cm = 6'2", and for a road bike I would guess you are looking at a frame size more around 60cm but of course you will have to investigate further to be sure.