Ways to find your correct Tire Pressure

Ive found that using this method is a good way to find out what PSI you should have in your tires. Given that the placard on the side is no longer valid if you throw on some larger tires.

CHECKING TIRE FOOTPRINT WITH A CHALK LINE



Park on level ground and aim front tires straight ahead. Draw a line completely across the tread.
Pull ahead 2-3 tire revolutions or until the chalk starts wearing off.
If the chalk mark is worn off equally across the width of the tread, the inflation pressure is correct.



If the chalk mark is worn off more in the center than at the edges, as shown here, the tire is over inflated.





If the chalk mark is worn off more at the edges than in the center, as shown here, the tire is under inflated. Keep making tiny adjustments in the tire pressure until the chalk wears off evenly and all the way across the tread. Once you've found the right street pressure, add 10% to all four tires. Then, measure the tires and add pressure to balance them.

Now, this varies depending on how stiff the sidewall of the tire is, but it can get you close.

 

Also, find a quality gauge, and only use it. Different gauges can vary 5 psi or more from one to another!

 

Ive posted it on another site, but never thought to post it up here, until you and I talked