wot can i expect for a set of 4 then

set of 4 m8

ive got a 2" inch spring and shock lift and im not worryed about the arches a lump hammer will sort that out all im worryed about is tyre size choice and one thing i 4 got to add wot tyres are werth buying im not looking to spend stupid money like 200 - 300

im looking to get a set off off road mud tyres 20% on road 80% off road. now i have a spare set off standard land rover discovery 1 alloys. the question i have is how wide can i go on those alloys, the tyre size ive been looking at is 235 85 r16 but could i go to a 245 or even a 255 85 r16. i...