Well, yesterday I had to bring the 8N down the road to my Mom's house to do some work.[about a mile] Stopped in to the gas station on the way to fill up, and to check the air in the tires. Well they were REAL low. The front's had about 12psi, and the rear's were under 10. How much should I be running? The front tires are old 16" truck tires,with a max PSI of 45. They are REAL dryrotted, so I only brought them up to 25. The rears I brought up to 15PSI, and I did not see a max PSI listed on the tire. What should I be running?