Tire Pressures + Spare Tire?

[3kushn]

Sorry I'm green to 4Runer and this site's search engine.

I've had my 4R for 3 days now, pushing buttons, and just figuring things out.

So I landed on Tire Pressure and all 4 on pavement are @ 35psi but the spare (great I know this) is at 50psi.

My first reaction was Holy Crap I have a dounut spare, so investigated and it looks like I have a real tire. Apology again, I've been too busy even to take a look.

My question I guess is, if I have a real tire, why is it inflated to 50psi?

I suppose there's the other question. Is 35psi a good pressure for my running tires?
It wasn't for my F150.

 

[pDubs]

You definitely have a full size spare and it shouldn’t be 50 psi.

I am assuming we are talking about the OEM highway tires? If so, air them up to whatever it says on the driver door jamb (should be 32psi I believe).

 

[ElectroBoy]

I only drop and check my spare at oil change time when I rotate the tires. So to allow for leakage over time and temperature I inflate it to the maximum listed on the tire. Usually 42-44 PSI.

 

[fkheath]

Sorry I'm green to 4Runer and this site's search engine.

I've had my 4R for 3 days now, pushing buttons, and just figuring things out.

So I landed on Tire Pressure and all 4 on pavement are @ 35psi but the spare (great I know this) is at 50psi.

My first reaction was Holy Crap I have a dounut spare, so investigated and it looks like I have a real tire. Apology again, I've been too busy even to take a look.

My question I guess is, if I have a real tire, why is it inflated to 50psi?

I suppose there's the other question. Is 35psi a good pressure for my running tires?
It wasn't for my F150.

All 4Runners for the USA and Canada are built in Japan. The factory purposely overfills the tires in case of loss during the long sea voyage. The tire pressure is reduced to normal at the port of entry. My guess is, since the spare has to be lowered to adjust the pressure, they don't bother to lower the spare pressure. You want to keep the spare above normal anyway, in case you forget to check it (I have yet to have the dealer check the spare pressure when I'm in for service), and you need to use it.

You should always use the tire pressure recommended on the driver door jam sticker, despite what some dealers say. My philosophy is the factory engineers who designed the car know better than some kid fresh out of tech school.

 

[LandCruiser]

All 4Runners for the USA and Canada are built in Japan. The factory purposely overfills the tires in case of loss during the long sea voyage. The tire pressure is reduced to normal at the port of entry. My guess is, since the spare has to be lowered to adjust the pressure, they don't bother to lower the spare pressure. You want to keep the spare above normal anyway, in case you forget to check it (I have yet to have the dealer check the spare pressure when I'm in for service), and you need to use it.

You should always use the tire pressure recommended on the driver door jam sticker, despite what some dealers say. My philosophy is the factory engineers who designed the car know better than some kid fresh out of tech school.

Yeah, the drivers at the Benicia port say it's a PITA when 20-30 cars have low pressures.

 

[flyrv9]

You should lower your spare as a learning experience. It's rather involved and not something you want to do for the first time on a cold rainy night. 50 psi is a little high - for normal running pressures I'd check the manual if you are running OEMs. If you have replaced your tires (like lots of folks do) then I'd go with what range they come with. Lots of other good info in the manual too.

 

[3kushn]

You should lower your spare as a learning experience. It's rather involved and not something you want to do for the first time on a cold rainy night. 50 psi is a little high - for normal running pressures I'd check the manual if you are running OEMs. If you have replaced your tires (like lots of folks do) then I'd go with what range they come with. Lots of other good info in the manual too.

Good point about doing a trial run tire drop.

Yes these are OEM Yokohama's. 3.5days on the road. Maybe not all Trims have Tire Pressure Monitors, IDK, mine does.

With my F150 I got bad tread wear with pressures off the door. Wore like it was under inflated. Sooo I added 5psi. It helped. A Silverado before that was the same way.

The above is why I asked. I suppose I have the answer. 32psi.

Thanks

 

[BobsTrail]

Have a look at my old post about the spare

Spare Tire Access 2013 TE

 

[LandCruiser]

Have a look at my old post about the spare

Spare Tire Access 2013 TE

FWIW I've always run mine with the valve side down, too.

The chance for random damage is far lower than not having it aired up because it's a PITA to access when mounted the other way.

 

[CajunMikeR]

I put mine valve stem side up. I'm not concerned with trying to air up a spare while it's mounted, if it's low or flat after being installed then there's obviously an issue with the tire or stem.

But then, I've also got onboard air compressor and a tire plugging/patching kit, spare Schrader valves, spare caps, etc.

Sent from my SM-G986U using Tapatalk