('19+) 2019 Sport - Correct Tire Pressure? - Subaru Forester Owners Forum
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post #1 of 26 (permalink) Old 06-15-2019, 12:31 PM Thread Starter
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2019 Sport - Correct Tire Pressure?

Hi,

I was wondering if anyone knows what the proper tire pressure should be on the Forester Sport 2019? The placard on the door jam says 35psi Front and 33psi Rear, but when I just checked them after getting the car from the dealership about 3 weeks ago, I see they are at 39psi +???? Is the door jam wrong or did the dealership overinflated my tires??

Falken ZIEX ZE001 A/S 225/55 R18 98H M+S

Thanks for any advice anyone can offer. :)

Blake

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post #2 of 26 (permalink) Old 06-15-2019, 12:59 PM
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Were they measured cold? Always measure and inflate while cold. i.e., not driven on.

If so, the dealership subjectively overinflated your tires.

I tend to run 2-3 psi above what it says on the door.

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post #3 of 26 (permalink) Old 06-15-2019, 01:05 PM
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It's a well known issue, Drake. Dealers almost always overfill the tires. One time after an oil change, mine were almost 15-lbs higher than they should have been!

You're safe using the placard. Some like to put in a little more than that, which is fine, too.

Mike

Edit: Just read Sneefy's note. I forgot to mention ambient outside temperature and whether the tires were "cold."
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post #4 of 26 (permalink) Old 06-15-2019, 01:25 PM
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It is my understanding that the cars are shipped with high air pressure (in case they start to go flat on journey). Part of dealer prep is supposed to be dropping pressure to recommended levels. That being said, my tires were at 39-41 when I picked it up at dealer. The salesman blamed the prep guy, etc.
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post #5 of 26 (permalink) Old 06-15-2019, 02:54 PM
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Mine were at 48 psi when I received vehicle. I was told they overinflated them at the factory for shipping. Dealer prep guys often miss resetting them.
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post #6 of 26 (permalink) Old 06-16-2019, 07:04 AM Thread Starter
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Thank you all for the advice and info. I will adjust them to the recommended PSI listed on the door placard this morning before I take it out for a drive.

Thanks again!
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post #7 of 26 (permalink) Old 06-16-2019, 07:16 AM
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Carmaker's recommendations are a little on the low side in order to give you a softer ride. Carmakes also get the tiremakes to make tires just a little softer than the ones you can buy for replacement. These tires will ride a little softer buy they also wear a little faster. If you replace the original tires with the same brand/size you will notice a little harder ride.
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post #8 of 26 (permalink) Old 06-16-2019, 07:41 AM
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Originally Posted by titleman View Post
Carmaker's recommendations are a little on the low side in order to give you a softer ride. Carmakes also get the tiremakes to make tires just a little softer than the ones you can buy for replacement. These tires will ride a little softer buy they also wear a little faster. If you replace the original tires with the same brand/size you will notice a little harder ride.
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post #9 of 26 (permalink) Old 06-16-2019, 08:55 AM
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That may have been the case before the Ford Explorer/Firestone debacle a few years back, but I don’t think manufacturers recommend low inflation pressures below whet the tire manufacturer recommends anymore... far too much legal liability nowadays to do that.

On trick shippers use to help secure vehicles for shipping is to reduce tire pressure, secure the vehicle to the shipping “station”, then re-add tire pressure to ensure the vehicle has no “play” on the platform. Dealers are instructed to verify the proper tire pressure during pre-sales preparation, but that step gets overlooked by lots of dealerships.

I’ve picked up new vehicles with as much as 8-12 lbs pressure over the stated recommended pressure in the manual/door placard. It happens quite frequently.

Another thing that often gets missed during the pre-delivery process is the rubber plug/grommet installation underneath the vehicle where the tie-down points are located, especially in areas where there’s little snow/road salt application.
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post #10 of 26 (permalink) Old 06-16-2019, 08:59 AM
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OEM tires are made to the car manufacturer's specifications and not to those of the tire company.

The same-name, same-size aftermarket tire is often of superior construction to the same-name, same-size OEM tire.

Remember the Ford Explorer/Firestone debacle, where Ford recommended tire pressures lower than Firestone's recommendation in order to compensate for a ride problem. The result: overheating due to low pressure, followed by tire failure.

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post #11 of 26 (permalink) Old 06-16-2019, 12:46 PM
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Dealer service departments and tire shops are notorious for over-inflating tires to the maximum psi on the sidewall. Guess they figure that most people seldom check their tire pressure and over-inflation postpones under-inflation for some time.

2018 2.5i Ltd FB25 CVT; 2010 2.5X Ltd EJ253 4AT

Last edited by ForesterBill; 06-16-2019 at 12:52 PM.
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post #12 of 26 (permalink) Old 06-16-2019, 03:09 PM
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Dealer service departments and tire shops are notorious for over-inflating tires to the maximum psi on the sidewall. Guess they figure that most people seldom check their tire pressure and over-inflation postpones under-inflation for some time.
I buy my tires at Costco, which includes free rotation, balancing, and nitrogen inflation for the life of the tire. We get it done as scheduled while we shop, no appointment necessary. Cheap Top Tier gas there, too.

They inflate according to the door-jamb label, and put their own sticker on the windshield with the miles-to-next-service and tire pressure written on it.

They also want you to stop by after 50 miles to have the lug nuts re-torqued. And buy a roast chicken while you're there, I guess.
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post #13 of 26 (permalink) Old 06-16-2019, 03:29 PM
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Glad to hear that Costco does it right. BTW, those roasted chickens are a loss leader to the tune of $34M per year!
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2018 2.5i Ltd FB25 CVT; 2010 2.5X Ltd EJ253 4AT
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post #14 of 26 (permalink) Old 06-19-2019, 12:42 PM
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Noticed our '19s tires were also "high" when checked on info screen, so check with gauge, it was showing same, but it handles well and rides good still. I'll likely leave them alone, they'll wear anyway.

The tire's sidewall spec is usually, that PSI required of that tire to carry the weight it's rated for. Less, and the tire will safely carry less weight. The PSI listed on the door is enough to carry the vehicle and manufacturer's recommended load maximums.Tire construction also plays into it. A lightweight tire with thin sidewalls designed to run elevated speeds … like pursuit tires on police cars, will use / need higher PSI to meet the load requirements. A tire with stiffer sidewalls will need less PSI and will run hotter due to internal ply friction at the higher speeds.

A few extra PSI over top of door sticker specs is where I like mine, I like crisper handling. Ride isn't hurt too much, tread wears maybe more in center, but I like the feel.

I'm getting used to this Sport still, but as an example, I run Goodyear RS-As on my wife's Mustang and our Mercury GM and on two T-birds, they show 44 on sidewalls, I keep them at 40 anyway. They wear great, and feel great, and I do watch wear patterns.

During my career as a state LEO, I always ran the tires at the PSI on the sidewall, always. Served me well.
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Originally Posted by rdclark View Post
… And buy (?) a roast chicken while you're there, I guess.
On a vacation trip in the Merc a few years back, I stopped to get an oil change at Newton, Ks. at an oil change place. Came out and drove away, and turned back, they let my tires down to 32 psi and the car was squirrely …. had them put back to 42 psi. Guy thought I was a loon, but I was the one driving it. .

I don't mind eating at a Costco, I like the sampling & I'll check with my T-wrench anyway.

...and do have a Safe Trip!

Last edited by CrystalPistol; 06-19-2019 at 12:55 PM.
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post #15 of 26 (permalink) Old 06-19-2019, 07:36 PM
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Akeblay, like you, I noticed Freehold Subaru in NJ overinflated my tires at 45 psi (cold tire pressure) though the door jam says 35psi Front and 33psi Rear. I will not be going to Subaru Freehold for any vehicle work.
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