i wound up going to 295/80R x 22.5 up front with 95# all around, made a dramatic difference. During the process of changing I checked the date code on the 275's and found 04. I got suspicious and checked the rears as well, lo and behold they are 04 as well. I'm thinking about putting up a sign in front of the dealer "Bend over all ye who shop here". :-/