No real downsides to going +1 in my opinion... other than a miniscule drop in MPG?
My OEM 245/265 PS2 set lasted about 2 yrs / 20k miles. I then switched to 255/275 PSS and have put 6k miles on them. They still show 7-8/32 all around. They ride and handle great (I'm sure you've seen the threads).
I went +1 for the thicker sidewall profile, which looks a little meatier and makes traversing potholes in SF a little more tolerable. Same in NJ?
Also, I recently switched from 220s to 359s (and remounted the PSS). I think the +1 size looks great on the wider wheels, while the 245/265 looks a bit anemic.
So yes I would def do it again.
