How much PSI of air do you guys put into your tires? Why?

 

32 front, 29 rear. Its on the sticker on the door jam.

 

Well the recommended psi is 32. It says that on your door sills. I dont think you should go over because when the temp of the tire rises, so does the psi. Up to you tho, but the recommeneded is 32.

 

Really? my dealer put the same PSI in the tires all the way around...i think 41 all the way around..i could be wrong it could be 31..but they put the air in not me HA! i will blame them HA!

 

My dealer routinely goes 30 all around - it's infuriating but it doesn't change handling and economy too much. If your dealer put 41 in, that number is neither anywhere near the max tire pressure, the manual pressure, or anything else. It's potentially dangerous and ridiculously bad maintenance. I'd never take it there again if they filled it to 41 on purpose.

 

I dunno..it's been fine since. I dont drive anywhere anyways HA!

 

yeah the tc tire psi is all messed up...i put mine on stock numbers and the tires look really really flat, and it feels flat too...id say 40 PSI is a good number....

 

my tire says recomended max pressure is 41psi... and they always say to fill at max for better performance and fuel economy so yah u must be full of sh#t

 

You are supposed to run them at the car manufacturers rating, which accounts for the weight of the car. Not the max PSI rating on the tire. Toyota reccomends (printed right on the door jam sticker) 29 rear and 31 front. They do not look or feel "flat" at that pressure and is the pressure you should run them at. 41 is the max pressure for the tire, not accounting for vehicle weight.

 

Ok moron - why don't you go into the tread and butter forum and start a little pole - manufacturer's recommended tire pressure or maximum listed pressure and tell me what people say you effin retard. Just because the tire can handle the pressure without exploding doesn't mean it's good for anything. Tires go on multiple cars. They have different suspension, weight, and handling characteristics. That's why you follow the information in the MANUAL and on the inside of the CAR DOOR. As for best gas mileage, higher pressure is probably better, but if you are so hot for gas mileage, which don't you get rid of your 17" low profile wheels and get some thin 15"ers? Get lots better mileage. Also, if you overinflate your tires, you'll wear them out in a hurry. New tires cost something on the order of $600 for 4 (yes I know you can get cheap ones, but that's what decent tires cost, all told). Oh... if you wanted great mileage, you obviously bought the wrong car to start with. I'm pretty sure it doesn't say Geo on the back anywhere.

 

Ok wait i think it was 31PSI now that i think about it. 41 was the max...that's right. The dealer put 31 all the way around. Sorry.

 

Yeah... 31 all around is more lazy than dangerous. I'm just always embarassed for them that at the DEALER they can't get things right. It doesn't seem to be uncommon though. Same way they often put in 10W30 instead of our recommended 5W30 unless you call them on it - they seem to just have procedures they can use for everything that comes in.

 

I would not deviate from what the manufacture reccomends for psi.
Look for this stuff. It's a damn sticky people. lol
https://www.scionlife.com/forums/viewtopic.php?t=35013

stock tire pressure front 220kPa(32psi) - rear 200kPa(29psi) - stock spare 420kPa(60psi)

 

look you guys what the manufacture puts down is a generic number that would account for the vehicle's weight and still be safe on all tires, they stay way on the safe side not looking for performance. Now alot of tires can go higher than what that number says NOW aslong as you inflate the tires while they ARE STILL on the car YES you can go to the max because there is no change in pressure, and yes i know in the manual it says STOCK tire pressure 42 the rule still applies.JEEEEZ guys just wow

 

from AAA: "An overinflated tire has been operated at higher pressure than recommended by the tire maker or the vehicle manufacturer. High pressure causes the tire to expand more, and wear will be greater in the center of the tread than toward the sides. The inside and outside edges wear less because they contact the road with less force than does the center of the tread. Overinflation shortens tire life and can make vehicle handling seem "light" or "skittish," particularly on wet roads."

your post makes no sense - the psi listed on the door jamb and manual is NOT a "generic" number, it's specific to the wheel and weight of the car. Oh yeah, but of course Toyota engineers are idiots, they only designed the f#cking car from the ground up, I'm sure they would know a lot less about tire safety on the tC than you do. JEEEEZ.

 

I'd go with what's on the door sill.

 

always go by anything listed on the TIRE's sidewall

moved to T&B

 

What? dgHotLava - you're a supermod - don't get this one wrong. The TIRE doesn't know what car you mounted it on. It just tells you "don't put more air than XXX in me or I might blow up". The CAR DOOR JAMB or MANUAL tells you what is RIGHT for your car. If you wanna go 1 or 2 pounds higher because it seems to handle better or something, that's debatable. Running it at max PSI in our car isn't. Maybe on a Geo Metro if you're doing some sort of high mileage experiment, but not on a tC.

 

you just contradicted your own statement

the tire does not know what car it under....

the tire manufature makes the determination through vigirous testing on how much air the tire can handle. how much weight they can support.
the speed rating, the tread wear rating, heat index........

are you gonna tell me if you get a set of super soft sticky tires (normal life of <15,000 miles) and throw them under a tC they should get >60,000 miles on them? just because that what the owners manual or sticker in the door jam says?

most commercial tires will only show a MAX psi. you should not run at this psi all the time. most of these commercial tires are designed for a wide range of 28-34 psi.
car manufatures know this and suggest psi for the weight of their product.

Now this is where you get in trouble. if you are telling someone who just bought a set of performance tires that need a higher operating pressure of 38-42psi to run by the door sticker suggestion of 32. their tire will be underinfalted and not perform up to it full potential or even cause harm to the tire or vehicle.

always go by what the tire manufature suggests.

my tires have a manufature suggestion of 40 psi. a max psi of 45.
are you gonna suggest i run at 32 like the door sticker says???

 

I put my Toyo's at the recommended pressure and my car felt like when i turned i was on the sidewalls....all kinds a squishy.....i have since raised them to 38 in the front and 34 in the back....they feel better but they felt awesome and super sticky when i left tire barn with 41