GS400bud

Mikey, did you get any negative imput from tire people regarding the taller 55 series tires? I'm running 235/45/17's on my GS but the Tirerack rep. was very firm in NOT going to the only 17" Comfortread which is the 225/55/17. He felt that speedometer readings and other factors make such a move a bad idea. A local tire dealer thinks moving up to a tire that is 1 inch taller should not be a problem. I really want to improve my ride. ( XGT H now btw ). Thanks