|
2011 3665RE
15,545 lbs gross weight, according to Keystones 2011 specs. Less 2,045 lbs pin weight, equals 13,500 lbs in axle weight, divided by 4, equals 3,375 lbs per tire in theoretical terms. You need actual weights to determine the real load on each tire.
GY's ST235/80R16E Marathon inflation chart shows:
At 65 lbs cold inflation, the max load on each tire is 3,000 lbs, max speed 65 mph.
At 70 lbs cold inflation, the max load on each tire is 3,140 lbs, max speed 65 mph.
At 75 lbs cold inflation, the max load on each tire is 3,260 lbs, max speed 65 mph.
At 80 lbs cold inflation, the max load on each tire is 3,420 lbs, max speed 65 mph.
At 90 lbs cold inflation, the max load on each tire is still 3,420 lbs, but the max speed is raised to 75 mph according to a bulletin they once had, which I can no longer find online. It used to be there, but they have probably withdrawn it for CYA reasons, due to so many marathon failures.
Some folks like to calculate tire pressure with a load/inflation chart, however I elect to run maximum tire pressure on all of my trailers. It makes for a little bumpier ride, but I have never had a blow-out or belt failure.
|