Is there any reason why 12's tend to use strops on the transom as opposed to thwart?
Thanks in advance
I assume you are referring to the mainsheet.
It is very simple in that at only 12 foot long space in the boat is at a premium. Space is important as the boat can be unforgiving to poor fore and aft trim and the ability to move freely about the boat is highly important. As a result most, but not all boats, are rear sheeted.