my low psi for tires light came on today. i had 26/27 psi on all 4 tires..
the max psi for the tires are 51.
i set mines to 45psi. will this affect performance?

i kno the lower you put it the more it sticks to ground. better ride quality.

but also the higher you put the psi more mpg and longer life for tires.

 

YES
lower that PRESSURE NOWWWW

THe tire will NOT last longer when raising tire pressure that high. your gonna get wear at the mid of the tread. not to mention their gonna increase a good 2-4psi just from daily driving. they were only at 26-27psi because they were cold. Try setting them to 30psi while the tires are cold. that would be best.

Recommended tire pressure is between 30-33psi. Max pressure is 51psi. meaning, if you exceed that you have a good chance of blowing out the tire.

thats probably true. but tire life will be lowered. You give alittle to gain alittle back its kind of a rule in life. handling performance may increase, but your tires are more likely to spin with higher pressure.

 

Meh... I just leave it @ recommended psi. I thought that's what you're supposed to do.

 

You should run 32-34 psi in those tires.

 

Actually they proved on Mythbusters that raising the tire pressure above factory spec does nothing at all to improve MPGs...go back to factory spec.

 

Agreed, for daily driving, leave your tire pressure at the factory spec for the best all around performance (acceleration, braking, gas mileage and safety)

 

Factory spec. is best because of tire wear. Too much psi ruins the center of the tread where as too little will wear the edges off prematurely.

 

I can't remember who, but they indicated that at 33 psi cold the center tread was getting eaten alive !

Rather than run that risk, and the misery ( $'s ) of buying new tires so early in the game, I run mine at 30 PSI cold.

The delaership pumped them back up when they did the free oil change, so back down they went.

I get reminder notes from OnStar , but I ignore them.

So far, at 5300 miles, they still look pretty good, and they did fine in the heavy azz rain I hit last Saturday on the way to Delta Downs in LA.

Good Luck w/ your set , and set presure !


Britt

 

33psi all cornors cold. Get it filled w/ nitrogen if you can, there is little to no performance gain, or mpg gain...but nitrogen has larger molecules which seep out of the rubber at a slower rate then random air (plus the added moisture your adding). Running normal air, the industry standard is 1psi loose per month. With nitrogen its much longer then that..plus on those random cold days in FL you will not see your TPMWS come on due to changes in the outside air temperature.

 

I always wondered what reason they were giving for using N2 in tires. Sounds like almost bunk.

Oxygen molecules have an atomic number of 12, Nitrogen is just up the chart at 14 being inert.

20.8% of air is O2, 78% N2 & all the other stuff makes up the difference.

Now really, how much difference is that going to make? Please explain this to me, I'm not being a wizeass, I just don't get it.

Anyway, to the OP, yes it was reported by a member that 33 psi was wearing out the center of the tread on the stock tires. metroplex maybe? not sure, sorry. I run 30 psi cold but with all highway miles and on different tires, I see 35 or so psi on the road. Mine are wearing even for around 14k miles now. BFG S/S g-force A/S.

 

30psi cold. 32-33 when warmed up.

 

Regular air is normally nearly 80% nitrogen so if oxygen and the other gasses that make up air leak out more easly than over time the concentration of nitrogen in the tires should become higher and higher. That is not the case though. Nitrogen in tires in nothing but snake oil.

 

I have never heard of anyone filling their stock tires that full. That's a little too close to the burst level for me...

I keep mine at 33 psi (stock recommended cold pressure) and haven't had any wear issues so far.

 

i run mine at 39. i got this number from about 2 hours of adjusting. along with water and watching the tread pattern.

 

1. Open your driver's side door
2. Read the label on the iniside of the door which lists recommended pressure
3. Set your pressures to that when the tires are cold and the car has been standing idle for a period of time

 

I work for Bridgestone North America as a Technical Rep for our commercial division (BBTS). I'm the rep in FL, and there is benefit, its not performance/mpg but the reduction of moisture in the tire (dry air going in) and reduced rate of of PSI loss through the rubber. Your figures are going off ideal conditions..and unless your in AZ your not going to see that from regular air, unless the shop is running an expensive dryer setup (doubtful) on the compressor (your friendly 7-11 free (or .25) air compressor is doing that right?)

Its not something I would pay for...but several places do it for free. Otherwise check your pressures monthly (which most people do not do, even once in the life of the tire)

 

i run mine at 36 for a bit firmer ride. Ill take the treadwear differenece of 3 lbs any day

 

That's me. My center tread is the ONLY part that is touching the road at 33 psi. If I drop it to 30 psi, the rears are still sitting way high. I think I need to drop the rears to 26 psi or add more weight.

The SS/TC I saw in the lot had lots of cupping on the corners of his rear tires... he must have been drifting that thing.

 

I noticed this myself... I've been running mine 30-31psi cold. I run my winters a little bit higher pressure so they aren't too low in the mornings. Then again, not like it would matter... I don't run TPMS sensors in the winter so my light is constantly on

 

^x2

^QFT

 

I have a theory about the tires - I noticed my stock Conti's are rated as Extra Load (XL) tires. I wonder if Standard Load (SL) tires are "softer" so the tires have better contact with the road at 33 psi.

I can't imagine 33 psi with the stock Conti's is yielding adequate traction and proper treadwear.

 

Just a theory here, but our Continentals are probably XL rated because of the cars they've previously been mounted to... 996-Gen Porsche 911s, AMG Mercedes models, etc.

 

Yeah, it'd be like putting Load Range E tires on a Camaro! Overkill!

 

I always thought ghat the purpose of putting nitrogen in tires was that it doesn't expand/contract as much with temperature changes as air does.

 

yeah, it has less temperature fluctuations, and the pressure is consistent. It also keep the the rubber from oxidizing and keeps your tires lasting longer. Thats the real theory behind nitrogen filled tires. does it work? I cant comment for I dont use nitrogen.