riddle me this Batman

[yurtle]

Originally Posted by shrpshtr

yurtle, you're getting different radius measurements from top to center, bottom to center (especially), and from left to right because the tire is under pressure from the weight of the cart. if you take the measurement with the wheel off the cart it should come out right or you have something warped or deformed.

No. I get that, but in "real world" rolling conditions, I'll bet you get a different number from the method I suggested. I'm too lazy to try it, but I'll bet it makes "some" difference. I'm considering the fact that the tire bulges somewhat from outside, to center, to inside. I'll bet rolling circumference is at least a cm or two different than other methods.

My ExRay lets me input the tire circumference in cm, so you can get pretty accurate.

[JohnnieB]

Originally Posted by azTony

I have Sahara Classic 22x11x12 tires and it says 32 PSI for setting the bead only and 5 PSI normal duty. That seems awfully low. How do I find out what I can run without ruining the tires?

Here's a couple threads on air pressure in that type tire.
http://www.buggiesgonewild.com/elect...-tire-psi.html
http://www.buggiesgonewild.com/lifte...-pressure.html

[JohnnieB]

Originally Posted by yurtle

...............
My ExRay lets me input the tire circumference in cm, so you can get pretty accurate.

Tire revelations per distance traveled is the most accurate, but inflation pressure weight loading will alter the number slightly.

Optimal inflation pressure gives you the flattest side-to-side footprint for the weight being carried.

One centimeter in circumference is roughly 1/8" in tire diameter, or about 1% on the speedometer.

[azTony]

Thanks JonnieB!