Tires: 3 different psi's!!!?

Question

Okay, I have a kia spectra. I decided to check the air. The tires on the left and right side are different. The tires on the left side of the vehicle says maximum psi 44. The tires on the right side of the car say max 35. The car's manual says 29 psi. Which Do I follow?? I heard that underinflating was more dangerous. The car isnt driven to often. My grandmother just drives it to the store.

Answer 1

Its amazing how everyone is just throwing out random PSIs....

It all depends upon air volume. If you've changed the tires since buying the car, the cars recomendation no longer applies since the internal volume of the tires you've installed may have changed.

ALWAYS GO BY WHAT THE TIRE SAYS!!!

The tire manufacturers have rated their tires to accomodate specific weight loads based upon the PSI they've listed on the side of the tires.

Neither is truely dangerous, over or under filling unless done so to a ridiculous degree, but both will significantly reduce the treadwear lifetime of your tires by unevenly distributing the load across the tire surface. With a slight overpressure, you might get an increase in gas mileage and, conversly, a slight underpressure will reduce mileage due to the increase/decrease in rolling resistance.

You want more air pressure (more air) in your front tires than the rears because they support the weight of the motor and (in front wheel drive cars) the transaxle whereas the rear supports only whats in the trunk and the rear suspension.

I have low profile (40 series) tires on my Maxima so the pressures are a bit higher than average tires but, for example... My front tires are at 40 PSI (hot) while the rears are at 34 PSI (hot).

PS- Be consistant when you measure the pressure. There will be a significant pressure differential between when the tires are cold and once they've been warmed up... as much as 3-5 pounds.

Answer 2

On the side of the tires is an inflation number. Fill when the tires are cold. The specs by the cars manufacturer doesn't apply to all tires. Go with the spec on the tire.

Answer 3

Please inflate your tires to what the Kia owner's manual says because the sidewall of any tire is simply the maximum psi the tire can be inflated to.

Answer 4

Go by what it says on the tire,not the manual.Those are not the original tires that came on the car new.

Answer 5

40 to be safe

Answer 6

i had the same question. You follow what the car says

Answer 7

call a kia dealership and ask.

Answer 8

its goes by tire ... if the tire is rated at 35 keep around 30 in it ... if its rated at 44 keep around 40 in it .. they wont be underinflated to u get below 25 or so ... u cant balance the tires pressure if they are rated differently u will need to go by the max on the tire .. if it pulls to one side then let alittle out of the tires on the side opposite the direction it pulls .. maybe a couple of pounds less ... inflating to the max is not recommended and especially if the tires are not new u can cause a belt to become seperated or break in the tire with too much pressure and that will make a bulge in the tire and itl be ruined  .. running down to about 20 or 25 psi wont hurt anything really but mileage will suffer ..

Answer 9

Put 32 psi in the tires that say 35 psi max and put 41 in the tires that say 44 max.

Answer 10

why do you have different tires?? Are they all the same size? check the side of the tire to make sure they're all the same. As long as you're using the recommended tire size, I would go with what the manual says. Read your own question, you said the tires said 44 and 35 MAX, not recommended. You shouldn't under-inflate, but you shouldn't over do it either.

Answer 11

30 psi all round

Answer 12

34 to 36 PSI is a good pressure to use.

Answer 13

I'd buy a set of 4 tires, all identical, and follow what the side wall indicates.