Posted by donjr on July 03, 2014 at 17:38:54 from (71.246.90.235):
In Reply to: Tire Dangers posted by UP Oliver on July 03, 2014 at 11:58:39:
Try looking at it this way. 20# doesn't seem like a lot of pressure, right? How about 15# in a rear tractor tire?
OK, that tire is something over 3' bead to bead in radius, and about 5' in diameter, making it's length somewhere around 15' or so cut and stretched out. If it's a 13" wide tire, the radius of the tire from bead to bead will be about 40", give or take. Just use 30" for something to figure with. That 30" times the 180" (15' diameter) gives you about 5400 square inches. Multiply that times the 15# psi and it gives you over 80,000# of force inside that tire. A weak spot will only have 15psi behind it, but the failure will have plenty of force to make that whole 80,000# turn to zero very quickly. The trick is to not be in front of it.....
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