I recently installed the Motoz Tractionator GPS tires on my 2023 PanAm to achieve better off road performance. They work great on raod. At the factory 36/42 psi pressure the bike felt too loose on gravel roads with lots of loose rock and gravel. So I lowered both tires by 4psi (to cold 32/38 psi). The bike is much smoother and the front tire tracks through loose gravel with much more stability. A dramatic improvement and the bike still tracks well on the road. But the TPMS occasionally flags my tire pressures, which is annoying but can be ignored. I wish I could reset it in the system menu.
Interestingly the tire sidewall lists the load rating (783lbs) at 35psi, but does not say that is the actual MAX pressure to run. So lower pressure than H-D specifies is OK with the tire manufacturer. The listed sidewall pressure is considered the minimum pressure to run at the defined max load. 783 lbs should not exceed the PanAm weight on the rear wheel (300lbs?) plus rider and luggage (175lbs?), unless you and your passenger are substantially endowed.
I am going to continue testing with even lower pressures for gravel and dirt, but in terrain that does not have medium and large embedded rock in the road (to reduce rim shots).
Does anyone one else have any specific experience or thoughts?

 

I run 28 in the front and ~25 in the rear when off-road. Just ran this at the Biltwell 100 desert race.

By comparison, when riding my Honda XR650R offroad I'm around 20PSI depending on conditions.

I rode the Pan about 600 off-road miles through Baja. Sand, rocks, potholes, deep ruts and whoops. I found that with the pressure too low it felt like I was going to bend a rim and/or god forbid roll the tire off the bead.

Felt like sacrificing a bit of grip on account of the bikes size and weight was a good balance.

 

My dealer hinted at this when i complained about the cupping in my front tire at 5k miles. He said OEM psi is for a 50/50 mix of off road and on. Since i was mainly on road he told me to add 4-5psi. Not sure how valid that is but it stopped it from cupping worse.