I've actually wondered about this, recently...
I know,.. proper tire inflation is important...
... but,... like I said,... I'm runnin' low, on purpose, because the roads here, suck!...
... but,...
Running by the rulebook (even though, I do like to carve the canyons),... has given me consistent, center wear... ... and I wonder, even with the additional heat, and friction,... if I won't get more miles by running a little low, and having the addition tread contact?...
I may have just talked myself into believing this theory...
...
... but, even if it costs me few,... it is way more comfy,.. and there is the added traction...
I'm 140lbs wet,... (the bike don't know I'm on there)(and my bike is at least 50lbs underweight)...
So, I'm running... 450 or 460lbs, fully loaded...
I've actually ridden' for weeks with less than 15lbs of air, and not noticed...
...
PS... an overinflated tire, will pop a lot easier, on a hard edge... like a curb, or jagged rock, etc...
I'm rambin' again...
...