I bought a used Aluma MCT trailer and have a question on the air pressure in the tires. The seller brought it to me a couple months ago and I never thought to ask him what the tire pressure should be. He lives over 150miles away and I've misplaced his phone number. I checked the tires today and they have about 15 psi which I think would be too low of pressure. Can anyone enlighten me as to what the pressure should be? The tires are 4.80-12 load range B, USA Trail by Carlisle.
2011 Merlot and Black TG and 2006 Aluma MCT trailer.