The dealer is wrong. No surprise. The door jamb label is correct. Keep in mind that the pressure is to be measured when the tires are cold. Tire pressure increases when the vehicle is driven as the tires heat up.

 

I got my 450h+ delivered by the dealer at 37 psi. I'd noticed the rated 33 psi as well. It probably is leading to a harsher ride, especially when going over road imperfections, without adding to driving dynamics. The dealer had tried to sell me nitrogen in the tires as well, which I managed to refuse during the purchasing.

 

I run 36 psi in my 21” 350h tires and love the ride. Guess it is all what you are used too. The increased pressure made the vehicle feel more performance oriented rather than bouncy😆

‘The 21” wheels are also eye candy to me!

 

My dealer consistently fill my tires to 36-38 psi even when it was delivered. I come home the next morning and let a little air out.

I think these 21" tires ride a little softer like that. and I like it.

 

I'd be willing to bet if you drove on the 19's then the 21's and had no idea what you'd be asked after the drive, most, if not all wouldn't notice a difference.

I have the 21's. I look down upon those cheapskates with the puny 19's ;-)

What I've learned reading this site..........

Some are way more sensitive than others.

Some have to find something wrong no matter what.

Some expect Lexus to be sporty, have power, luxurious, and get great gas mileage all at an affordable price.

 

I think you're right that many would not notice. Someone going from the Gen 4s 20" to the Gen 5 21s would not notice since the sidewall height is the same between the two tires.

 

Frugal…definitely as most who bought Lexus are but living in a mountain state have better snow traction with 19” tires.

 

How do you figure? Both wheel sizes use the same width tire.

 

19" tires have more sidewall and so are more flexible. This gives better snow traction.

 

OK, thanks for that.

 

On ice & snow it’s about tire contact patch…less contact means higher pressure per sq inch which is what you want in winter. In summer its the opposite.

 

The pressure per square inch is dictated by the tire pressure, but a taller sidewall gives a more uniform pressure over the entire contact patch, which is important when traction is less than ideal.

 

The contact patch area is simply the weight on that tire divided by the tire pressure. I don't buy that pressure uniformity argument. To each their own though because the difference, if even there, would be negligible.

 

Whatever the reason, it is well-known that a taller sidewall gives better snow traction.

 

That makes sense. Pickups that do snow plowing have tall side walls. They are also not overly wide since a very wide tire would pile the snow in front of the tire especially in deep snow.