Just confirmed with Trailex (building trailers since the 1960s / experience).
They state the recommended pressure on the (sticker or manual) that is related to the trailer weight and expected load. Since Trailex trailers are light weight with light loads... Higher pressure will cause the tire to bounce. This is damaging to the trailer and the load.
Pretty generic, but this is a guide on their site for Tire care.
https://www.trailex.com/Instructional%20Sheets/Tire%20Safety%20Information.pdfQuote:
Maximum permissible inflation pressure
The maximum cold inflation pressure to which a tire may be inflated.
Quote:
Recommended inflation pressure
This is the inflation pressure provided by the vehicle manufacturer on the Tire Information label and on the
Certification / VIN tag.
I also have been trailering boats since the mid 70's and never have inflated trailer tires to the
Maximum tire pressure.
Logically "Maximum" is just that. Maximum load on the tire requires maximum pressure. Maximum load is maximum capacity of the two tires combined. Actual load is far less typically. Especially with a light weight aluminum trailer and a light weight water craft.
I again defer to Trailex.