Ok, here is my experience. I have a 2001 27' skyline layton and it weighs in at 8680# empty. I just weighed it the other day. I originally had 15" rims and tires. After a total of 6 blowouts over the years, I finally changed to 16" a few months ago. I run E rated tires and keep at 80#. Not sure how old your unit is, but please check the leaf springs for damage. Mine were original and 12 years old. The Callifornia freeways are horable and the rv takes a beating. Our last outing a few weeks ago, we had two rear broken leaf springs a few miles from home. The rear tires/axle moved forward and we were tire to tire and smoking. Also, one of the front leaf springs had the second leaf broke. I was lucky we didn't have 3 broken springs and a major problem.