Font Tire Wear

[jwebb]

Have a little over 5K on Cooper Cobra tires (235-60-15) and the middle are almost down to the tread bar! They are not over pressurized (28 psi), common issue with Cooper or fronts in general? Doesn't pull or vibrate at speeds...

[David Williamson]

surprised the fronts are wearing out, most of us go through backs. Your pressure should be lower, I have 17's and run 21 psi. Light car equals low pressure.
David W

[dwheeler]

If the middle wears out first, they ARE over pressurized.

These are light cars with big tires. They do not require anywhere near the max pressure rating.

[rich grsc]

Have a little over 5K on Cooper Cobra tires (235-60-15) and the middle are almost down to the tread bar! They are not over pressurized (28 psi), common issue with Cooper or fronts in general? Doesn't pull or vibrate at speeds...

Sorry, but yes they are, 20-22 psi would be in the correct range.

[jwebb]

Thanks, appreciate they quick replies...

[Murd]

I have the same tires. 20-21 all around, about 3500 miles with even wear

[Tree]

If the middle wears first, the tire is always over inflated. It is really the only way that happens. Inside our outside edges can have to do with camber but the middle will push out when overinflated so the edges are not making as much contact. On the bright side, your ride is about to get better and you are also about to get more traction. Not easy to get both of those together.

[Jeff Kleiner]

...They are not over pressurized (28 psi)...

Actually, yes they are.

Jeff

[Big Blocker]

Generic rule of thumb is: 1 Lb air for every 100 Lbs car weight . . . 2200 Lb car = 22 Lbs air. that is just a starting point and needs to be adjusted for your car with you in it and whatever you carry with you; passengers, golf clubs, spare tire, 100 Lbs of tools, spare parts, etc.

I personally run 21 front, 22 rear with 275x17 and 315x17 . . . no signs of wear yet, In five years since I swapped to my Nitto's.

Doc