Compare these two--Cooper & Continental

[paulri]

Thanks for clarifying that. 25K to 43K is a massive jump in and of itself.

Originally Posted by wag123
Originally Posted by paulri
Wag123, was that 42 PSI cold or hot?

When you did go just to 40, but found it unsatisfactory--was that because there was no improvement in tire wear, or just not enough from your perspective.

Not trying to pester you, but I've never heard anyone advocate doing this before, and I've suffered enough tires (I think all of them) getting only 50% of the warranty life, that I"m thinking of trying this.

Tire pressures are always quoted, checked, and adjusted when the tires are cold.
I went from 35 PSI to 40 PSI on my second set of tires. Tire life went from 25k miles to approx 43k miles, but I was still seeing a small amount of higher inner and outer tread wear on the front tires, indicating under-inflation.
I went from 40 PSI to 42 PSI on the Primacys. They lasted over 50K miles, tread wear was nice and even across the front tires, but I replaced them due to rubber deterioration before they wore-out. The Michelin Primacys came with a 60k mile warranty, I suspect that they would have lasted 60k miles if I kept them on the van until the tread was worn-out.
I think JJ meant that his MPG and tire wear improved, so did mine.

 

[paulri]

Let me think about that one......................................

Never. Which is why I asked you.

Originally Posted by JohnnyJohnson
Originally Posted by paulri
Just to be clear, the life of your tires grew shorter, when you ran the PSI up to 40?

Originally Posted by JohnnyJohnson

I'm running 40 PSI in my Corolla and both MPG and tire wear increased.



LOL and when was the last time you were at my house comparing the ware on my tires and trespassing?

 

[paulri]

Because I did mention AT here, I want to post a correction. I went ahead and used my dad's tread gauge today, and sure enough, two were of varying tread depths--ranging from 4/32 to 6/32 (center treads were 6, the sides were 4). The tires with lower treads were more uniform--more like 4/4.5/4 32s--so the same pattern--center treads were higher, side treads were lower). Anyways, now I know that the one guy at AT who told me that I had varying tread depth on each of my tires was actually telling me the truth!

Now I don't have to stop buying tires from AT. I'm glad about that, as they are incredibly convenient to use.


Originally Posted by paulri
Well thanks for all the comments. But after all that, I went in today (to the same store that I went into yesterday, when I was told I needed new tires), and a different guy went out and told me they were fine. The front were 4/32, the rear were 6/32, so he just had me rotate them, and I'll postpone my purchase for several thousand miles.

What really makes me suspicious is that I asked the guy today, if at least they were wearing uneven, and he shook his head and said no. The guy who actually rotated them said they were fine. This is the first time I've had this type of experience with Americas Tire (of being told two different things by two different employees).

 

[paulri]

The fact that all my tires were taller in the middle, supports the idea that the Sienna tires should be overinflated. I have been fairly regular about having them pumped up to 37 psi hot--and when I'd get this done every two months or so, they'd be at 34-35 PSI. I'm definitely looking forward to less tread wear with them going a bit higher than the recommended amount.

Originally Posted by paulri
Because I did mention AT here, I want to post a correction. I went ahead and used my dad's tread gauge today, and sure enough, two were of varying tread depths--ranging from 4/32 to 6/32 (center treads were 6, the sides were 4). The tires with lower treads were more uniform--more like 4/4.5/4 32s--so the same pattern--center treads were higher, side treads were lower). Anyways, now I know that the one guy at AT who told me that I had varying tread depth on each of my tires was actually telling me the truth!

Now I don't have to stop buying tires from AT. I'm glad about that, as they are incredibly convenient to use.