It should be done by the dealer before delivery but check it! Too many of us have had over inflated tires.

 

yep it should be done when they come of the truck its call a PDI( pre delivery inspection)
they all so go over everything to make sure its working before being sold

 

Personally I like the feel of the road so I keep them at 40psi. Good info though.

 

Is there a difference in tire pressure with the different tire sizes?

 

This is same for all manufactural to prevent “flatspot” on tires because vehicle may be parked and stationed for long period of time. I have my tire set at 35psi and it seems to be perfect for me. With 35psi, ride is noticbly more composed and elimiated frontend vibration which was felt during test drive with 45psi. I test drove as soon as it came off the truck so dealer didn’t have time to fully “prep”. 33psi is manufature recommendation but 35 is sort of optimal setting for gas mileage and safety for most tires. For Soul owners with 18 inch rims, we probably have to inflate more or/and pay extra attention to prevent accidentally bending the rims. 18 inch rims for our Soul may be over done but it sure looks good and it fills the wheelwell nicely.

 

A great*exchange of information.

 

what's going on, why are you resurrecting all these old posts with comments that don't mean much - please explain and what is your location so we can understand it. :think:think

 

Conwel, It's called post # bumping and it's frowned upon on just about every forum.
On the one forum where I've been a moderator, that kind of action can get the poster banned and all their post deleted.

Nonsense posts add nothing to the Informational Value of the forum and they take up valuable forum storage space.
Hopefully one of our great moderators will deal with it. Eh?

 

The bumper is from Belarus.

Use the like button dude or get bumped right on outa here

 

Upon delivery, mine were at 43 PSI and the ride felt a bit bumpy.
So I did the same thing, took them down to 36 PSI (the door panel says 33, but I always do 3-4 higher since they are not cold and have been driven to the gas station).

Is there a good rule of thumb on what PSI to use, vs. what's on the door label? I don't want them to be under or over-inflated.

 

I used to abide by the door panel PSI recommendations for years. Now, I run max PSI in all my vehicles. One question I've never heard answered is how to define "cold PSI:
"Is 'cold' PSI the door panel rec when night-time temperatures are at their lowest"??? I would argue, yes.

Greg

 

Greg, The 'cold' PSI is the measurement taken when the tires are cold. Tires that have been sitting in the shade are 'cold'. Tires that have been running on the road for a while are 'hot' and typically the measured PSI is a couple of PSI higher.

Typically, I measure the tire air pressure in the garage at home, determine how many pounds I should add, and then re-measure the PSI when I get to the gas station. Then I top up the air based on the new measure if the tires have heated up.

If I get confused, I add even more air and then re-adjust once the vehicle has sat in the garage or the shade for a while.

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Question of personal preference perhaps, but I prefer to run the tires a pound or two above the 33 PSI specified by Kia. 35 lb. pressure should not be over-inflated enough to cause uneven tire wear.

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Yes, this is a resurrected thread and Dajedebcpolwe is guilty of poor netiquette. tsk, tsk. Nevertheless, the content has to be of interest to many recent Kia Soul owners.

 

I adjusted my tires to 38 PSI. That's halfway between the "cold" 33 PSI on the door panel, and the 43 PSI from the dealer lot.

I hope that isn't too high. I figured if the tires have been driven to the gas station where the air pump is located, they are at least a bit hot. So round up 5 to 38 PSI? Better a bit over than too low?

 

On my 2020 Soul I have green valve stem caps which means nitrogen fill. I noticed my tires were at 33 PSI so I called the dealer to see if they could pump them to 38 with nitrogen - they said they don't have nitrogen... Not happy... Costco has nitrogen but only fill tires they installed.

 

Nitrogen-filled is definitely a gimmick as N is already in the air (sure, at slightly different concentrations, but it's there).

Greg

Greg

 

Nitrogen is just Snake oil. Just use air.

 

Fun fact- the 2020 Soul EX has the same size tires as a Tesla Model 3. I was showing my buddy my car tires, and we compared them. Same tire. 235/45r18. His is Michelin. Ours is Hankook. Still a high performance tire. He said his Michelin’s are tuned for mileage.

 

My sister-in-Law’s husband’s father was an independent tire engineer who did consulting for Michelin and Goodyear. He told me that manufacturers set the tire pressure for most comfortable ride. For best tire wear and gas milag, he recommended increasing the tire pressure by NO MORE THAN 2 to 3 pounds. Also, check tire pressure when car has not been driven for at least 4 hours.
The ride will be slightly harsher but not objectionable and you’ll get better gas mileage. I would regularly ger 44 Mpg in the summer on the interstate with 4 adults a full trunk and the A/C running in my 2011 Forte doing this.

 

Your sister-in-law's husband's father...??? Wait...Isn't that your brother's father... or... Your father???

On a sunny day and parked on black tarmac, "resting" tire PSI will be quite a bit higher than night-time "resting" PSI, so it's always been a mild conundrum for me. I figure as long as cold psi is at or above the door placard "minimum", it's good to drive. It's simply the visibly-air-deprived tires being driven that surprises me daily.

Greg

 

Your sister-in-law's husband's father...??? Wait...Isn't that your brother's father... or... Your father???

On a sunny day and parked on black tarmac, "resting" tire PSI will be quite a bit higher than night-time "resting" PSI, so it's always been a mild conundrum for me. I figure as long as cold psi is at or above the door placard "minimum", it's good to drive. It's simply the visibly-air-deprived tires being driven that surprises me daily.

Greg

It’s better, if possible, when vehicle is parked on Tarmac to test Tire Pressure in the morning.

 

36 psi cold for me.

 

before i traded it in for my 2020 Soul EX, I kept the tires on my 2011 Forte at 36 psi, 4 lbs. over the recommended pressure. Every time I took it to the dealer for service, they commented on how well the tires were wearing. I had 40,000 miles on them and less than 1/2 the tread was gone. But they were Michelin Defenders— Great tires in rain and ice, not too bad in the snow either.

 

The whole nitrogen thing is just like many other must haves, just an extra profit gimmick.