Wheel selection will be a HUGE factor on something that big as offset will need to be on the money for any chance of fitting. XV does put 275 on the front of some of their builds, so there must be room in the fender for them.
Rim width is also a factor in this as a wider rim can stretch a smaller tire bigger or vice-versa. Also, many manufactures also have tires that are somewhat over/under stated some amount from their published size as well. For grins, here is a conversion;
235=9.25"
255=10.03"
275=10.82"
295=11.61"
315=12.4"
335=13.18"
So to go from a 235 to a 275, your going to add around 7/8" per side or about 1 5/8" total width.