The drive train is built to take 750 16's so no it wont be too bad for wear BUT 265 75 16 is a bit wider and back before I fitted the 235 80 16s I fitted up a 265 75 16 (standard size on GQ patrol, nice and easy to get) but it hit the guard lip on the front when turning but it looked good.
I think without flares, 245 would be about as wide as I would go.
It starts loading wheel bearings and stuff when you start playing with offset and wide tyres.
Good luck with what ever you get.

