Stopped in and visted with the director of operations at the airport. Looked at the area he is willing to let me use. Now he has to pitch his boss. Since its a city airport that could be the sticking point.
Should know in a few days.
09 HCHII, w/Navi
07 Mazda3 S Touring, 5MT
Mild Hypermiler or Mad Man?
The Solstice has 18 X 10's, great tires to race around on, it has factory Goodyear's and so far they have had almost no wear for the last 30,000 miles. The best MPG I got was at 44 psi and got 34 MPG maintained Hwy cruise at 64 MPH. Now this car loves to break loose the rear end in rain, so the comming of winter I aired down to 35 psi and could still get over 30 mpg. With the coming mixed snow and rain and getting stuck on a hill in the snow and having to air down to 20 to climb it, I have been keeping the tires at 25 psi. The result of my MPG has been at cruise of 29 MPG. The ride is softer and the rear hooks to the ground more, the ABS on ice is less jittery than when I ran 35 psi. Hope this helps.
i think you will find that the answer will vary. and probably due to a number of factors.
and theres another way to look for an answer, just check your tire wear. i try to maintain the highest pressure without causing tire wear problems.
on my 2000 monte carlo with 225/55/17 bfg t/a t tires 44psi would wear the center of the tire faster, 40 was still but not as bad, 35 is where i'm at now. but its 35 with these tires, with snow tires, performance tires, tires with a higher or lower load rating, or a higher or lower speed rating, etc... i might run 30psi, or i might run 50psi.
on my old car, 94 olds 88 w/ 225/60/16 i ran 44 - 50psi always and with a variety of tires, i couldn't wear out tires in the center of the tread to save my life
Seeing the quantification would be nice, but as everyone else said it's clear that higher psi tires are easier to 'break lose'.
Lower psi means higher contact patch and allows for more tire deformation (that is the tire can absorb a bit more power/force and maintain traction by flexing a bit). Now of course this is only dry traction, because with dry traction you want a larger footprint because of the higher contact patch. In wet or snowy driving you may want a smaller contact patch. This is because there will be more force (weight) in a smaller area with the smaller contact patch and will mean it will take more water to hydroplane the smaller contact patch.
I do notice a little less traction with 50# in my tires but I adjust my driving style to account for that.
I just recent replaced my cheap 175/70/13 tires after almost 72,000 miles. About 40,000 of that was at 50#. There was a little more wear in the middle of the tire but it wasn't nearly as bad as I would have expected. If I had rotated the tires more, I may have gotten another 5,000 miles out of them as the rears had a bit more left in them. I'm sold on running a higher pressure.