[scottydl]

How do you guys calculate the correct psi to run in your tires? Obviously our cars don't have a handy sticker in the driver's doorjamb to give that guidance.

I just got new tires on my '69 Executive, and according to the sidewall it mentions 35psi for max load 2028 lbs. However I weighed the car and the front axle is 2640# (so average 1320# each tire) and rear axle is 2140# (average 1070# each wheel). The rear is barely half of the tire rating, but obviously cutting the psi in half would be way too low.

The shop had aired the tires up to 37-38 which felt pretty harsh, and deflating them to 32-33 made a significant difference and feels pretty smooth. But if I can/should lower the psi even more based on the car's actual weight, I've got no problem with that.