Wow, i have a 265/30/19 on a 10 inch front wheel, and a 315/25/19 on the rear of my car on an 11" wheel! Im sure you can fit them, simply because its only 10mm wider, AND it largely depends on the tire brand you buy. I have had 3 different brand 265's and all of them fit my 10" wheels differently!? check the individual tire manufacturers specs on each tire on the website, they will all reccomend a different size wheel and such, but you can find the section width at the very least, this way you can compare the two...

Mark