Maximum Tire pressure (a police perspective)

I have driven large RWD cars most of my life, although not quite as heavy as a cop Crown Vic. I would never put more than 40 PSI in the tyres.

Reply to
116e32s
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as long as they are stock size tires I'll only put what the it says on the car, NOT what it says on the tire.

Reply to
m6onz5a

^ +1

Reply to
thekmanrocks

^ +1,000,000!!

Reply to
thekmanrocks

So on my SUV with 10-ply rear tires, I should ignore the 75PSI the manufacturer specifies? Why?

Reply to
Brian Gordon

An SUV with 10 ply tires is not a car.

Reply to
Bill Vanek

Brian Gordon:

75psi - tire placard or door post?
Reply to
thekmanrocks

Door post and Owners' Manual

Reply to
Brian Gordon

My Uncle Ralph claimed that you could never put too much air into a tire, that you just hook up the pump, and you pump and pump until no more air will go in and then it's correct.

He died of old age a decade ago, surprisingly. I was expecting him to die in some horrible highway accident involving exploded tires...

--scott

Reply to
Scott Dorsey

snipped-for-privacy@gmail.com wrote in news: snipped-for-privacy@googlegroups.com:

there are many reasons to ignore the door sticker for tire pressures, but going over 40 lbs without a weight reason is probably not wise, dollar wise. KB

Reply to
Kevin Bottorff

Thanks for re-posting my article. That was back from 2005. I have recently updated it to answer many of the questions and comments that article generated.

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Reply to
dave5150

I was surprised that the high pressure didn't cause problems but looking at other reports it does seem that some vehicles and tires do ok at pretty high tire pressures. While googling around I found this

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which was a pretty interesting report on actual tire contact area versus tire pressure. Results are nothing like expected.

Reply to
Ashton Crusher

Don't guess, measure. It doesn't take a lot of effort to chalk up your tires and drive around a bit.

Also notice that lateral stiffness will increase as you add air pressure, and that may actually make more of a change in handling on some tires with larger sidewalls than the change in contact area.

--scott

Reply to
Scott Dorsey

This is such fun, I just have to post. Who knew tire pressure was such a pa ssionate topic?

I drive a police interceptor (Crown Vic) and also have Ford's installer's d ocuments.

Although the tires may have either 35 or 44 psi on them, and although the c ivilian owner's manual and door sticker suggests 35 psi cold pressure, the police install documents suggest 41 psi as the correct cold psi for pursuit cars.

Every written article I have seen on optimal pressure for pursuit cars indi cates 41 psi. This is also consistent with the tire manufacturer's indicati ons for pressures at high speeds for V-rated tires.... the pressure goes up past the normal maximum rating of 35 as the top speed increases.

It seems most of these cars are run at 41 to 44 psi, with some agencies opt ing for 35, but few.

Tire wear and performance are better with these cars at higher psi.

Reply to
spieltenor

So the general consensus on this thread is that higher pressure is better.

Over on rec.audio.pro, louder albums are better.

I operate nothing at max - always in the upper third of operating range. Sucks to be correct in a MAXED out world!

Reply to
thekmanrocks

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