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3rd & 4th Generation (1992–1996 & 1997–2001) Toyota Camry Discussion for years: 1992-1996 & 1997-2001 Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

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Old 03-30-2008, 08:58 AM   #1 (permalink)
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Tire Pressure

The tire pressure on the 96 Camry says 29 psi and loaded 32 psi.
I assume thats with a 35 psi max factory tire and I assume most car tires have around 35 psi max.

I have BFG Traction TA with a max 44 psi.
When a tire has a higher max pressure of 35 psi do you still set the psi to factory setting?

My Traction TA's always wear out on the out side part of the tread. Its even on both sides of the tire and on both left and right side of car. The tread in the center always had plenty of tread when the sides wore out.
Do I want to increase the tire pressure on this tire to get more center wear? Will going over 29/32 psi cause loss of control.
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Old 03-30-2008, 09:33 AM   #2 (permalink)
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What is your Psi at now? If i where you I would raise it about 3-5 Psi to get rid of the outside tread wear but don't go over your tires max pressure rating. Tires are expensive and you don't want them shredding on you prematurely.
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Old 03-30-2008, 10:18 AM   #3 (permalink)
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They are at 34 to 36 psi.
I will try 40 psi.
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Old 03-30-2008, 10:26 AM   #4 (permalink)
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Quote:
Originally Posted by landtoy80 View Post
My Traction TA's always wear out on the out side part of the tread. Its even on both sides of the tire and on both left and right side of car. The tread in the center always had plenty of tread when the sides wore out.
Do I want to increase the tire pressure on this tire to get more center wear? Will going over 29/32 psi cause loss of control.
I'd go up a bit with pressure then.

I've heard of people taking some chalk and drawing a line on their tires (but I've never done this myself). Drive around the parking lot a bit in figure-8s and then check the "wear" on the chalk line. If it is under inflated, it wears on the side first, over inflated wears on the inside. You are aiming for the best tire patch possible for the best tire wear and breaking/traction. As long as you stay under the recommended 44 psi you should be fine.

The "hyper-miler" Prius people regularly run over the max pressure recommended on the sidewalls. They do this to get the least rolling resistance for better fuel economy.
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Old 03-30-2008, 11:16 AM   #5 (permalink)
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I aired them up to 44 psi and will adjust from there.
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Old 03-30-2008, 12:52 PM   #6 (permalink)
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Originally Posted by Cannabis Camry View Post
What is your Psi at now? If i where you I would raise it about 3-5 Psi to get rid of the outside tread wear but don't go over your tires max pressure rating. Tires are expensive and you don't want them shredding on you prematurely.

i agree. i bump my up from 36 to 40 psi.
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Old 03-30-2008, 04:43 PM   #7 (permalink)
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What tire size do you have? I would suggest bumping it to around 38. 40psi and ur ride will be shit. Don't pump up the tires to the max psi suggested.

Also, are you taking corners a little too fast? Just a suggestion to throw out there, if you are taking corners too fast, it will wear the outside first.
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Old 03-31-2008, 09:42 AM   #8 (permalink)
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Higher pressures help with gas mileage and wet weather traction, but decrease dry cornering because the tire "footprint" on the road gets smaller. PSI means pounds per square inch and that includes square inches of surface area per pound of car weight on each tire.
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Old 03-31-2008, 11:36 AM   #9 (permalink)
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if my tire psis are 35 i always pump them like 36-39 psi extra since the road are very hazard around my places.

Once quick question: In the front, I have a tire for 35 psi (Left)& 44 psi (Right), in the rear I have 35 (Right) and 44 psi (Left) is that the right way to have the tire layout like that?
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Old 03-31-2008, 12:35 PM   #10 (permalink)
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Originally Posted by tooyoungtoodie View Post
Once quick question: In the front, I have a tire for 35 psi (Left)& 44 psi (Right), in the rear I have 35 (Right) and 44 psi (Left) is that the right way to have the tire layout like that?
No. If your tires don't have a directional tread I would match up the similar tires. The 44PSI tires in the front and the 35s in the back. Or vice versa. Not that different tire pressure ratings will drastically change ride and handling but the lack of symmetry would get on my nerves. lol.
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Old 03-31-2008, 02:17 PM   #11 (permalink)
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Originally Posted by nikita View Post
Higher pressures help with gas mileage and wet weather traction, but decrease dry cornering because the tire "footprint" on the road gets smaller. PSI means pounds per square inch and that includes square inches of surface area per pound of car weight on each tire.
Generally from my experience, a higher tire pressure to a certain extent actually raises grip and cornering ability. That is to a certain extent, generally, stay away from the last few PSI from the max rating of the tire.

The situation you are talking about is when you REALLY over inflate a tire...


And to respond to tooyoungtoodie, try to match sets of tires left and right, so have the same tire on the rear left and right, and try to match the tires on the front left and right. Try to put the set of tires with better grip characteristics(generally the tires with the most tread) at the drive wheels.
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Old 03-31-2008, 03:20 PM   #12 (permalink)
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thanks would help me alot!
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Old 04-01-2008, 09:53 AM   #13 (permalink)
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Originally Posted by EvoFire View Post
Generally from my experience, a higher tire pressure to a certain extent actually raises grip and cornering ability. ...
What you experience is a feeling of more connection to the road and better turn-in due to a stiffer tire sidewall, similar to going to a lower profile, like 60 series instead of 70. The ultimate cornering grip (dry) is still somewhat dependent upon surface area, which is reduced in direct proportion to pressure.
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Old 04-01-2008, 05:46 PM   #14 (permalink)
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Originally Posted by nikita View Post
What you experience is a feeling of more connection to the road and better turn-in due to a stiffer tire sidewall, similar to going to a lower profile, like 60 series instead of 70. The ultimate cornering grip (dry) is still somewhat dependent upon surface area, which is reduced in direct proportion to pressure.
Though I don't have actual hard information to argue with you, I do believe that the tires are suppose to hold their shape up to the rated max tire pressure. True about the side wall though and its not just a stiffer sidewall, however when you have lower pressure, the tires will roll on to the side wall which would truly reduce grip available.

The air pressure vs grip is my experience from autocrossing and it is what has worked for me. Autocrossing allowed me to put my car at 10/10ths and try out the different settings with minimal consequences.
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