What Tire PSI are you running?

[mkassab]

I suspect multiple answers are scattered through several post, but I wanted to get a consolidated opinion of what Tire PSI are you running. I also suspect many are using tire size 245/45-18. Please state your tire size and psi. I did a search on "psi" and came up with nothing?

I've heard 25psi, but have no idea if that's correct

Thanks Mark

[Dgc333]

1 psi for every 100 lbs of weight. I run 23 psi in my 33 Speedstar.

[Bronco Mike]

Use a paint pen and put a line across the tread on all four tires the drive it a short distance. Paint worn out in middle of tread = too much pressure, paint worn off at outside edge of tread = not enough pressure. I did this on my roadster and ended with 18 psi rear and 19 front with the tires warmed up.

[Bart Carter]

Correct PSI will be different for different rim width and tire construction.

[DanQ]

Ditto to Bronco Mike's reply. Paint stick or chalk lines across the tread, then see how evenly they wear off. This is also how I determined the correct pressure on Jeeps with huge oversize tires. I also had a '23 T-Bucket with 21" wide rear Mickey Thompsons and with so little rear axle weight, I was down below 10 psi on my rear tires. My 33 hot rod tires are kept at about 25 psi.

[edwardb]

245/45ZR18's on mine on all four corners. I ran 24 PSI front, 24 PSI rear, cold. Seemed about right. But as others have posted, ways to find out more precisely.