Thread: Tire Pressure

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Hi All,
New to the forum and would like some feedback on tire pressure. I posted several pics of the car (32 chevy). Basically a light car with 70's suspension, nothing fancy. Don't race or do burnouts (I'm old). Front - 165R15 steel belted radials. Rear - N50-15 Kelly Springfields. Started with 28 lbs all around, very harsh. Lowered it to 25 which is quite a bit better. What would you run?

Thanks,
Pete

hmm. try like 24, see how it sits, if it's on the sidewall at all, can't stay. tires like that are desidned to ride @ 30-32 PSI.

From my jeep experience you want the tire contact patch to be in full contact across the tread. I run 32x11.5's on my jeep, and anything above 27# they are crowned, and will wear out the middle of the tire, not to mention riding very rough. The tire shop always pumps them up to between 45&50, because they are "truck tires". One trick is to chalk a line across the tread, drive ~100', and see where it is rubbed off. Deflate & repeat until you get an even erasing action, and you have found your ideal balance point for your vehicle weight and the stiffness of that tire. Just my $0.02 - it's worked for me on big bulky tires on a light jeep.

"One trick is to chalk a line across the tread, drive ~100', and see where it is rubbed off. Deflate & repeat until you get an even erasing action, any you have found your ideal balance point for your vehicle weight and the stiffness of that tire. Just my $0.02 - it's worked for me on big bulky tires on a light jeep."

Excellent advice RSPears. I have done the same thing on a few rods that I worked on in the past!