Hi, I am ordering a road bike online but according to my height and inseam length I am right on the edge of medium and large bike frame sizes. I am 5'11" and inseam length of 31", the Medium bike frame size ends at a height of 5'11" and inseam length of 31", while the Large bike frame size starts at height of 5'11" and inseam length of 31", so I am undecided on which would be better. My first guess would be the Large bike frame size, but I'm not sure, I'm new to bikes.