I might have seen this question posed in one of the other boards, but wanted to put it here in case there was something different about ebikes.
I just transfered over my smooth slick tires from one of my other bikes to this converted MTB ebike. the highest PSI is 65 lbs. Is it safe to go over that?
I seem to remember (from another thread) that it was the legal department of the tire company that wanted you to keep it at the lowest possible high-end PSI. They wanted to avoid you blowing up the tire, killing yourself, then suing the company. The designers/engineers are always pushing for a high psi for smoother ride and so that you won't exert yourself too much during the ride.
I know that there are some 80-90 psi tires, and I'm saving up for those.