I have a Ryobi P2200 hybrid weed whacker. It takes .065" (1.65651 mm) trimmer line. I have found better deals and much better shaped line. I have found a piece of (plastic) wire that was exactly .08" (2 mm) and fed it through the hole and it fits with some room left over (did not run with wire in, very dangerous!).
I would naturally think there is a great possibility that it would work. But would there be a reason why it does not say in the manual it can handle .08" (2 mm)? Will it mess with how it auto feeds, how it performs etc. Would it be worth trying? Not that I go spend $8 at a local store and it does not work.