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Tire Pressure 65 HR15 Tubeless 15 x 4 1/2

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AUSMHLY

AUSMHLY

Yoda
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Hello,

What are you running for air pressure in your tires front to rear?

Handbooks for bias tires says, front 20lb, rear 25lb. Maximum performed speeds increase all pressure s by 5lbs.

I have 15 x 4 1/2 tubeless 60 spoke wheels, Verdestein 65 HR15 86H radial tires.

1964 BJ8, daily driver, not track. I have 30 psi front and rear.

Thoughts? Thank you in advance.
 
Last edited:
The best pressure for me is 30lbs all around. PJ
 
If the tire wear is constant across the width of the tire, your pressure is correct. If there is more wear at the edges than at the center, increase the pressure. If there is more wear in the center, decrease the pressure.

You can also use a infrared temperature gauge and measure the tread temperature at the center and edges of the tire after driving a few miles. The temperature should be uniform across the tread.

Alternatively, put a chalk mark across the tread and roll the car a few turns of the wheels and see how the chalk has worn.
 
I go with 30 PSI all around in all of my olde cars, except for the Morgan that has bias-ply tires; it gets 20 PSI all around.

I don't drive any of them THAT hard and so variations to prevent or facilitate oversteer or understeer are moot.

RT
 
I run 30/30 in 180-15 Michelin XAS's.
 
Roger, I have the same wheel and tire combination on my BT7 and have settled on 30 lbs front and back. Higher than that may improve MPG but it also makes the ride more bumpy.
 
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