Originally Posted by Francesca Knowles
... in dual-axle applications tires' load carrying limits are downrated...
Note: "Dual axle" means double pairs on a single axle.
Correct - but it's "dual wheel", not "dual axle". A pickup truck with dual rear wheels is usually identified as "DRW" in manufacturers spec sheets, and is informally called a "dually".
When specifications include a load index (not a load range), tires
intended for dual applications have both the load index for single use and the load index for dual use shown, separated by a slash. For example, 112/110 would mean 112 in single use, and 110 in dual use.
Of course, I've never seen a moulded fiberglass travel trailer with duals.