I had new set of Yokohama YK580 on RX300 2 years ago. The warranty is 60,000 miles. I have about 28000 miles on those tires so far, somehow the 2 front tires are worn out terribly. The mid treads are gone. I did not measure it, but one month ago when I had oil change, I was asked to replace tires.

I always have regular wheel alignment and tire rotation, so I wonder what happened to those tires. I thought Yokohama very good brand. Today I talked to a mechanic. He said the tire pressure is too high, about 35-36psi, while the sticker on the door says "30psi". What's more, he found an "impact bubble" on one rear tire.

Any thoughts? Does the high tire pressure cause tires worn out much faster?

Thanks

 

Yes, over-inflated tires can cause tires to wear out faster and get damaged easier. Check out this article from the tire rack.

http://blog.tirerack.com/blog/where-...cts-tread-wear

 

We keep the tire pressure around 34psi all corners and haven't had any uneven wear issues. I've found 30psi too low just by how flat the tire sits on the ground..

 

There are many factors involved ,, including calibration of pressure gauges, temperature, moisture content, laden weight etc etc.

At the end the wear pattern tells the story.

Overinflated (center symmetric (middle to out): vehicle rides on the middle tread -> center wears out quicker)
Underinflated (Center symmetric(middle to out): vehicle rides on the outside edges -> sides wear out quicker)
Alignment ... uneven (middle to outs).

Once you get even wear, then we can get into the discussion on longevity of tire. And we have to consider traction, rolling, braking, noise, tread, constitution and yes comfort.

We will never be able to find one psi value that works for all. I would say Lexus weighed all variables and came up with recommended value.

I generally inflate ties a night before to +4 psi of my liking and the next morning I let out the excess pressure.

Salim

 

Interesting routine! Why not set to your liking right before you head out?

 

My compressor produces hot air and my RX left undriven overnight allows the tires to cool off.

Trivia .. Visualize the side walls of the tire. As the wheel spins the sidewall is squeezed near the bottom and expands at the top. Subject that to any material and heat will be produced. When they say make the reading at 'cold' that means ... undriven tires.

Salim

 

Mine is set at 37psi, not too bouncy, not too rough. Pressure does depend on tire brand and tire size. You just have to find the sweet point, not too soft and not too tight, then keep it at that pressure.