Quote:
Originally Posted by oil pan 4
Problem with bumping the pressure is the tires will wear in the middle and fail inspection sooner but will have plenty of tread on the tire shoulder.
Tires will need to be replaced sooner.
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I'm not sure this is universally true, my cobalt had "less" air in the tires on the front (typically 40-44psi) rears I kept from 44-50psi.
The rears were wearing very evenly and had actually very little wear at 35k (tires are only rated at 40k if memory servs)
The fronts were worn down the middle and had much more wear.
I rotated the tires (I don't rotate until things are either unbalanced or wearing wrong especially on the 1st set of tires to see how the car is setup)
After "learning" how my car wears tires I plan on keeping the fronts at 50psi instead and reducing the rears since they don't have as much affect on fuel economy, by doing this after each rotation the wear location will be altered.
Also remember if the tire wears evenly at say 36psi and not evenly at 50psi if you wear them in at 50psi then reduce pressure later on the tire will "catch up" faster to being evenly worn because the majority of the weight will be on the edges while at 36psi with a worn center.
So what I am saying is that you can wear a tire evenly by altering its position or pressure occasionally.