Why do some tires have low max sidewall psi of 35

[sl2eggplant]

Hopefully someone here can provide some insight.

Why do some tires have such a low max inflation pressure of only 35 psi. My Pirelli Cinturato or Pirelli P3000 Cinturato, can't remember the exact name. These were ~$80/tire at Discount Tire for 185/65/R15 and they all have an 85k mile warranty. I don't consider these the "cheapy" brand. I would have expected Pirellis to have a minimum max of 44 psi. Essentially, I want to inflate my tires to at least 40 or even 44 psi.

[SVOboy]

Well, I'm not entirely sure, but I sent a quick question to the Pirelli tire people to try and figure out by what criteria their tires came to this rating, so we'll see if we can get a response.

[Tango Charlie]

My uneducated guess would be that it's due to the construction of the carcass of the tire. From what I understand, the inner layers and belts is the backbone and carries the stresses and provides the strength of the tire.
But it will be interesting to see if Perelli responds.

[Frank Lee]

Why wait for Purrelle?

IIRC CapriRacer has already explained it here...

[Piwoslaw]

My guess is with TC, it's all about sidewall construction, reinforcement, etc.
My winter tires are 185/65R15 and have max sidewall 51psi...

[99LeCouch]

My Pirelli P4's have a max of 44 PSI. They've seen that and some more the 50k miles they've been on my car. Not a problem.

[wagonman76]

Seems to me the cheapest tires are 35 PSI, the better tires are 44 PSI.

[redline5th]

It's just the way they're made... that's the maximum it is safe to run them at. More expensive tires would probably be safe to run at a higher PSI.

Just remember that the PSI increases roughly 3-4psi when you start driving as they warm up. Heat causes expansion.

[jusnicho]

a lot to do with construction. Some tires are very flexible and your wear pattern will eat the center of the tread on your tires if you over fill.