Why do you want to run an E rated tire in a mini?
I run E on my F250 because I haul the rock crawler, boat, and whatever else w/ it.
My .02 is you don't need an E rated tire on such a lite truck. You will get a stiffer sidewall, but I don't see any other benifts.
It is a stiffer sidewall, buts tougher too. I ended up cutting a gash in a set of toyo's from a fallen tree branch. They were C rated. Granted C rated are lighter, but im still getting good gas milage with my E rated duratracs. My tire size is equivalent to a 32x12.50x18.