[JRTJH]

paoutlaw ,

With the exception of a very few travel trailers, (none produced by Keystone) all RV tires are used in "tandem" not in a "dual" configuration.

The referenced chart you posted does have the "single tire application" weight ratings which are appropriate for trailers with a single axle or with a two or three tandem axle setup. The "dual load" referenced in the chart is for tires used in an application such as the dual rear axle on a 1 ton truck or on some farm/logging trailers which have a "dual wheel axle". It does not apply to the tandem axle design commonly found on travel trailers.

I have no doubt that some owners have replaced their tires with ones that don't meet the axle ratings/GVW ratings for their trailer, but I haven't seen any RV (from a manufacturer) that has been equipped with tires that don't meet (or exceed) the axle rating required for the GVW of the trailer. If you have some examples, please post them.

You are correct that the rating for "dual tire use" is lower than for "single tire use". That is true with any tire manufacturer's specification, not just Towmax. However, it doesn't apply to travel trailers with tandem axles.