[beesonmichael]

Advantage of running a bit psi over spec is they'll never run underinflated which is the worst condition, setting at spec they will run underinflated as soon as they start losing pressure which slowly happens normally to all tires.

https://www.tirerack.com/upgrade-garage/how-much-does-tire-air-pressure-change-over-time

With mandatory tire pressure sensors and a display in the dash telling us that the air is low… I disagree with your comment we used to check our air on our own, and learned by touch and how the vehical swerves and braked if our tires were low. Adding extra air above what is stated is a foolish. Keep it where it should be and check it when you get gas or before you go to work. Use the old common sense Approach. It worked for the last 150+ years, and saying if you add a little then you never have to think about it leads the people down a dangerous path. Set limits are there for a reason.
You are saying over eat 1 lunch and you will never need dinner again. Sorry, I can’t let those with no common sense buy into that.

 

[beesonmichael]

Show us where I said that, you'd better read it again, wasn't what I said! Pressure still needs to be checked regularly. I've always added a couple psi, been driving for over 60yrs, it's never been a problem, tire pressure gauges can easily be off that much or more and the TPWS won't display a warning unless the pressure is several psi (4 or 7psi IIRC) below the set point. Spec for 19" tires on the Rav4 is 35ps, I run 37psi.

Quickdtoo said:
Advantage of running a bit psi over spec is they'll never run underinflated which is the worst condition,

This is what brought out the red flag. I can't find the original posting. was it edited? If not then i apologize.

My rav4 notified me at 3 psi upon start up. when the tires are cold and have less air pressure.

As another poster said. Do you run heavier oil just incase yours thins out? this was a good analogy.

As far as low pressure. With good tires you do not normally feel a tire is too low until it is 12-15 lbs below max stated. Off roaders and myself running in the dirt / sand - lower the pressure to 1/2. and refill before getting back on the road. Tire manufacturers have designed their tires to perform at their best at the stated pressure.
I also have run high on tire pressure in my previous Prius Prime, and Plug in tring to get better mileage, but i did notice the stopping distance increased, and traction reduced slightly.

No disrespect. Just caution to those who may be impressionable.

 

[beesonmichael]

@kingrayman819 I agree and I've always adjusted the inflation pressures both up and down to suit the vehicle and what's being carried at that moment. I'll increase pressures by a few PSI when I know I'm going to be doing high speed, loaded road trips, and will decrease pressures by a pound or so during the winters when the fluid in the shocks become more viscous and the tires themselves are less pliable.

The notion about eating a larger lunch to forego dinner doesn't apply. A better example would be that both you and I may wear the same size and model shoe, but you weigh 200 pounds and I weigh 300 pounds. So I'm going to use a stiffer sole insert to better support my heavier body weight. Or that we both weigh 200 pounds but you're going to run a marathon in your shoes and I only walk in mines, so you need a special insert as well.

The tire pressure for normal use, normal weight is best at standard tire pressure. With the 19” wheels and standard tire pressure there is no side wall bulge. The ride is firm (tires) suspension is soft for a AWD. Adding air can make the tires louder and poppy like a over inflated basket ball.
Yes, loading it up, towing etc. it is common to inflate to max pressure (more common in trucks and under wheeled vehicles) My stock Prius Prime had small wheels and weak tires. I commonly inflated to max not because of load, but because the tires had crappy soft sidewalls that were wearing from normal driving, and allowed the vehicle to sway more than it should. When those tires finally wore out or should I say blue out I replace them with some heavier 80,000 mile tires with stiffer sidewalls. Around these tires at the standard pressure because they were firmer and held the road without sway.

I guess it all depends on what you drive, how you drive, and what tires are on it.

 

[beesonmichael]

I have had good luck with American tire here. They have done patches and replacements for free on tires i did not purchase from them. If you have one around you... give it a try. I do always give them a shot when i look for new tires.