ChiDiver - Since the 275's are actually smaller in diameter, wouldn't the gear ratio go the other way, to 3:79 from 3:55. Not trying to be picky, I'm just making sure I understand.
Interesting tidbit. The 265's turn 657 rotations per mile, and the 275's turn 694 rotations per mile. So the 265's should get better mileage on the highway. But the 275's would offer better pickup, I think.
So anyway, back to the looks. I've just seen some trucks with some really dinky tires, they just don't look right.