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Old Aug 13, 2011 | 02:35 AM
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chicagokid's Avatar
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Default Tires PSI??

Why is are fronts at 33 and the rears at 30?? Can we have it at 32-33 on all 4 tires? And do we follow OEM specs on lowered springs such as TRD??
Old Aug 13, 2011 | 02:44 AM
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it is usually done so that the rear end has a little more grip than the front so the car is even less likely to over steer.
Old Aug 13, 2011 | 04:39 AM
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as far as i know, you follow the oem until you change wheel/tire size
Old Aug 13, 2011 | 11:55 AM
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Originally Posted by chicagokid
Why is are fronts at 33 and the rears at 30?? Can we have it at 32-33 on all 4 tires? And do we follow OEM specs on lowered springs such as TRD??


Because if you over inflate your tire(s), the center of the tread will ware out much sooner than the outside of your tread. Witch means that the center of your tire is the only section that is making contact with the pavement and therefore you will loose traction, handling and stopping distance. If you under inflate your tires the outside edges of your tread will ware out first, near the sidewalls of the tires. Same loss of traction as above. But also when the tire is under inflated, at freeway speeds, the tire overheats significantly and therefore run the risk of the tire ripping to shreds and looks like the tire exploded. The engine is in the front, you are sitting in the front seat and there is nothing in the back. If you load a bunch of $h!t in the back, then increase the tire pressure as in the front if you will be hauling it a long distance.
Old Aug 13, 2011 | 07:47 PM
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Ive had my tc for over 5 years now, been running the stock Yokohama S32A's. I used to keep them about 32 psi back when I lived in Florida, but since I moved out here to New Mexico, where Im over a mile above sea level, and have to deal with the desert heat, Ive gotten much better results keeping all 4 tires about 35 psi....better (more even) treadware, better gas mileage, a little better control around the mountain curves (I like to introduce a little oversteer since our car has a ton of understeer), so on and so forth. I haven't driven a 2nd gen tc yet, but I imagine the same principles apply: The proper inflation falls within a certain range, but sometimes you have to adapt it based on 1) If you are running all season or summer tires, 2) What type of driving you do, 3) The topography/climate/barometric pressure of your local environment, and 4) what kind of load you have on the car

Last edited by ColonelSanders85; Aug 13, 2011 at 07:48 PM. Reason: spelling
Old Aug 15, 2011 | 03:39 AM
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Originally Posted by 2tCornot2tC

Because if you over inflate your tire(s), the center of the tread will ware out much sooner than the outside of your tread. Witch means that the center of your tire is the only section that is making contact with the pavement and therefore you will loose traction, handling and stopping distance. If you under inflate your tires the outside edges of your tread will ware out first, near the sidewalls of the tires. Same loss of traction as above. But also when the tire is under inflated, at freeway speeds, the tire overheats significantly and therefore run the risk of the tire ripping to shreds and looks like the tire exploded. The engine is in the front, you are sitting in the front seat and there is nothing in the back. If you load a bunch of $h!t in the back, then increase the tire pressure as in the front if you will be hauling it a long distance.

This man here is a genius!

Also, my dad explained it to me JUST like that when i asked why the tire pressure is the way it is
Old Aug 15, 2011 | 06:16 PM
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Thanks guys for the all the info. Make sense to me now. Being in St. Louis I'll keep the OEM specs for tire pressure and I usally don't have any load at the back.
Old Aug 20, 2011 | 05:18 AM
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Sorry, I don't know much about cars, but I was wondering about this for a while: If the tire pressure on the back are different than the front, what happens to that idea of balancing and tire wear when the tires are rotated for the 5k services?
Old Sep 14, 2011 | 07:43 AM
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They just add/subtract the neccessary air out of the tires needed to match 33 up front and 30in the rear. Does anyone feel like ther losing psi by the week?
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