Got a '13 w factory 19s. Dealer set pressure sky high to like 42 psi. Door jam calls for 33 (for 19s). But it just feels slushy. Where do you guys keep your tire pressure ?

 

34 psi on the front
33 on the rear

19 inch stock RSA's ... though that's changing real soon

 

34/35 all around. With 33 I was noticing outer wear sooner so upped it a little. It's also about your driving conditions so factor that in too.

Stock 18's with RSA's and door jamb also states 33psi all around.

 

Thanks brosefs. What's wrong w stock tires

 

Nothing wrong with the stock RSA's at all really. They're a decent long life tire and a tire that fits all conditions equally well. Naturally most prefer to purchase tires that are more catered to their driving habits/conditions.

 

I agree completely. I still run the RS-As that came on my '09 that was built in Sept of 2008, and they still have between 5/32s and 4/32s of tread left with over 40K miles on the odo.

AND

I rotate every 15K, which means these tires have been rotated only twice.

AND

These tires have never been re-balanced since the car was built, yet the tread has worn very evenly, and the tires run smoothly at speeds I won't post here.

I carry 37 psi in front and 35 psi in rear because I make lots of sharp turns (checking out homes on hundreds of neighborhood streets), which wears the outer edges of the tread too fast at the normal 33 psi.

But I can't imagine many situations where the ideal psi would be over 40 (maybe a car loaded with hundreds of bricks?). I think the original poster (neub) has a dealer that does not know tires.

 

The grease monkeys at the dealer also prepped my car with a tire pressure of 40 psi. I ride 34 all around because the tires lose about a psi a month so it averages 33psi.

 

Great point - tires actually do gradually lose pressure (although slightly less so for those running with nitrogen). I also tend to fill to one psi higher than I plan on running so as to average the chosen psi over an extended period.

As most here know, we should measure psi before driving the tires very far, as a tire that has been driven until the tires are hot will read a higher psi than is actually in the tire.

Also, this time of year, when the temperature drops, a tire that measures 33 psi at 90 degrees could measure around 30 psi at 30 degrees. That is because heat expands air, and cold contracts it. We need to check our psi after we have that first big temperature drop.

If our tires are wearing faster on the outer edges (shoulders), we are not carrying a high enough psi for our driving conditions. If they are wearing faster in the center portion of the tread, we need to lower our psi slightly. I carefully check the tread depth in each groove across the face of each of my tires every three months, and record the readings.

Over an extended period, this enables me to know where the tires are wearing most. This enables me to adjust the psi, which enables me to extend the useful life of the tires.

 

The tires on cars sitting around are always kept at a higher pressure to avoid flat spots. It seems all the cars get delivered at this high pressure

 

Well. Seems like the door jamb is spot on. After a day of driving to/from work - 33psi cold gets in you in that 35-37psi warm.

 

I would think that part of prepping the car for delivery would require among other things to adjust the tire pressure to the correct value.