Originally Posted by
oaxaca
I can't tell if you're joking or not. But I feel like you still don't understand that psi is directly related to surface area. Its rated for only 33 psi because its a 2.25 inch tire, probably made for 40-45mm rim. It has absolutely nothing to do with how stiff the sidewall is...
True, if the sidewall could support all the weight, there would be no need to air up the tire. But those moped tires appear TOUGH. I'm a bit surprised the pressure ratings are so similar to much thinner bike tires. Of course, it is the casing that holds the pressure. Rubber isn't particularly strucural.
So, PSI is really rated to the contact patch.
40 psi.
x 5 square inches
----------------------
support 200 lbs (on 1 tire)
100 psi
x 2 square inches
----------------------
support 200 lbs (on 1 tire).