TKC

If you go out to nearly any site and read about tires, you'll know that the number on the side of the tire is the max. That I agree with. But running the tire at the max pressure allows the entire tread to stay in contact with the road and decrease fuel consumption. You suggested that the guy run a tire recommended for 50 psi max to run it at 30 psi (which is about 40% below it's max!) Shall I talk about the firestones and SUV rollovers for minute, or had that been hyped enough on the news?

Underinflation will cause the coefficient of friction and rolling resistance to be increased dramatically and cause the tire to over heat and possibly fail. Not to mention the decrease in fuel mileage based on the car having to "push" the tire down the road. When a tire is run too far less than max, you cause the sidewall to roll too much in corners causing a dangerous condition with the cornering and handling of a vehicle.

A car should be run at it's max tire pressure, or just slightly (3-4 lbs) under based on "feel" as Bob is saying, but running a tire recommended for 50psi at 30psi is begging for trouble, and I continue to say that anyone that recommends this is giving bogus advice.

BTW, this is a "cold" tire pressure, not a heat of the day tire pressure. If you measure your tires in the morning and then after the car sits in the sun, you'll see an increase in tire pressure.

If you would like to debate me more on this, please send me an e-mail at thomas.christopher@hurlburt.af.mil

tom

posted by 151.166.15...

• Tire pressure PSI, Yoni, Mon, 7 Jul 2003 15:25:31
  • Maximum allowable vs. what's reasonable., Ari , Tue, 8 Jul 2003 07:47:46
    • Tire pressure and speed rating, Bob Davis, Tue, 8 Jul 2003 15:51:31
  • Use the numbers given by the manual, 46 psi is too...., TKC, Mon, 7 Jul 2003 16:39:25
    • Not true, T. Christopher, Tue, 8 Jul 2003 12:50:51
      • Please post your source. If you don't know...., TKC, Tue, 8 Jul 2003 17:41:48
        • Clarification, T. Christopher, Wed, 9 Jul 2003 09:04:14 <-- Viewing This Message
          • No point arguing as you are dead set on your...., TKC, Wed, 9 Jul 2003 10:24:45
            • Change my mind please, T. Christopher, Wed, 9 Jul 2003 11:46:33
              • Are you confusing maxmium allowable pressure..., TKC, Wed, 9 Jul 2003 12:29:15
                • Nope, T. Christopher, Wed, 9 Jul 2003 14:19:31
                  • Let me ask again, please point us to a single source..., TKC, Thu, 10 Jul 2003 05:45:33
                  • I'll hate myself in the morning, but >, Bill Davies, Wed, 9 Jul 2003 14:54:17
                    • I'm not ready to wave the white flag, T. Christopher, Thu, 10 Jul 2003 06:43:08
                      • We're both right...sort of, T. Christopher, Fri, 11 Jul 2003 09:07:00

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