Board Thread:Wiki discussion/@comment-4881935-20130327060139/@comment-4636093-20130327075104

I think it should use radius always. Because it's technically the range of non AoE skills too. (Like Kennen's shuriken has 1050 range, so it can hit anything within a 1050 radius).

Using Diameters for just ground targetted AoEs and radii for everything else is a little haphazzard.

Also large AoEs like Trundle's contamination would get a really exaggerated and missleading number if they were in diameter.