[EricH]

Originally Posted by chinckley

Does anyone know the PSI of the trackballs?
I see in update 4 that they weigh about 7.3 pounds, but
one of our mentors wanted to know the PSI.

Carolyn Hinckley

PSI doesn't matter. Check Q&A and they'll tell you the same thing. It's the size that matters. I suppose if you really want to know the PSI, you could inflate one to the right size using a pump with a gauge on it and check that.