EndOfThis

Where does everyone like to keep their Tire Pressure at?

15 posts in this topic

The sticker inside my 2013 Spark says 40PSI, the stock tires themselves say 50PSI. I made the mistake of trusting the dealership to have given me the car at 40PSI. Not wanting to let any of the nitrogen out I hadn't checked my tire pressure until the warning light came on recently. All tires were around 30 PSI! The warning light was telling me that all of my tires were too low on pressure, sure beats having a slow leak mind you and perhaps now I know why I have been getting bunk milage. I bumped them all up to 40.

Where do you like to keep your tire pressure at??

Deputy Dawg likes this

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My car was delivered at 37psi. on an 95 degree day. I've seen as low as 29psi in 14 degree weather now. Rule of thumb is 1-1.5psi per 10 degree drop. Nitrogen should reduce that, but it still happens.

The inflation rating on the tire is max inflation, not suggested inflation. Use the car's suggested pressure.

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I keep them at 40 psi.

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I run ours low at 48psi due wifey driving. If it was mine car it'll probably mid 50s. I run my Yaris at 54psi on either the snow tires or the summer stuff. My old xB I used to have I ran 63psi.

My tercel I run at 42~ and my Malibu at 38 (crappy tires)

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I run mine at the max pressure printed on the side wall, 36,000 miles and the are wearing even across the face, by increasing pressure I gained about 4 mpg. We have found higher pressure also seems to increase tire life also, currently tires look like I have 60-65% of tread left.

Smikster likes this

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Does anyone have a recommendation on what pressure I should keep mine at, living in FL?

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Does anyone have a recommendation on what pressure I should keep mine at, living in FL?

40 psi is a good bet. Just make sure your tires are cool when you check the pressure. In other words, don't check them right after driving, let them sit for an hour or so.

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45 psi rear, 48 front

Smikster likes this

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I'm running 40 but mine are 17's.

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45 cold

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40 psi is a good bet. Just make sure your tires are cool when you check the pressure. In other words, don't check them right after driving, let them sit for an hour or so.

Thank you!! I checked a few hours after getting the car from the dealer and they were at 34-36, now they're all at 40!

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Because the stock tires contain such a low volume of air (7.2"wide at 55% of 7.2" gives us 4"high) the tires easily fluctuate in pressure due to temperature changes. I find myself constantly adjusting the pressure. I now run at 45psi 'cold' so a slight drop would bring them down to spec of 40psi. I also find better mileage at 45psi. Next set of tires will be 195/55R15 on the stock rims. 2" higher with a softer ride but the speedometer and odometer will read 5% lower-eg: 80mph actual will read as 76mph. 30mpg will read as 28.5mpg. Rpm's will also be lower by 5% at actual speed. Not a big deal.

•I would actually prefer to put 205/50R15's on the same rims, giving a better ride without the 5% trade off as explained above as the 205/50R15's are about the same height but not sure if the 205's will rub on turns...anyone know about the 195, 205 I'm talking about and whether that will work or anything I have overlooked?...I'm not too familiar with tire stuff.

Edited by Retired old Gearhead

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Idk the the site but there is a place out there that will give you compatible tire sizes for your stock tire. It might be tire masters website. I found a few years ago when I was shopping for tires for another car.

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I ran the stock tires at 40 lbs front 42 lbs rear for a compromise between fuel mileage and ride quality (tires were still harsh riding).

On my 185/60-14" wheels I run 34 lbs front and 36 lbs rear. They are not rock hard fuel efficient tires like the stock tires. Much smoother and better traction. On any all season radial that isn't a rock hard fuel efficient tire, the 2250 pound Spark feels and rides better at tire pressures well under 40 lbs.

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Thanks for the info.   We just bought a used 2015.  The tire pressure light came on while wife was driving home. I was behind her on I95. I set them all to 40 at gas station.   Then found this when I got home.   

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