Am I absolutely insane for being tempted buy these in 275/65-18? Yes, that's an extra inch of diameter and 1.6" of width. Please, somebody talk me out of it.
Goodyear Wrangler AT/S
Goodyear Wrangler AT/S

Abut a 1/2" biggerAre 265/60-18's okay?
From a discussion earlier this year, I believe someone said 265/60-18's are sufficiently close to stock so as to not cause any concern or damage to the suspension system. Is my memory correct?
senza said:Eric - I read the article you linked re "oversized tires" and my comments are:
mechanical advantage - correct observations,with the emphasis on the degree of size upgrade....a 265 x 60 is 0.49" taller than the stock tire(+1.6%) barely noticeable
increased mechanical forces: generally innacurate...slightly more breaking force required because of the larger diameter, but the wear and tear on brakes /suspension / bearings is dictated by the weight of the vehicle,not the diameter of the tire. Faster wear of these components will not happen.
suspension geometry: bogus - wheel/tire diameter has no effect on suspension geometry
driveline geometry:again, bogus, no effect whatsoever.
I have run 265 x 60 's for 10 mths/21,000 kms and the only negative is a little extra dirt thrown on the side of the vehicle from the extra width.