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This question is running in two different threads.
Nowhere in the governing regulations or tire industry standards will you find reference to brand names. All RV trailer tires are fitted to the trailer certified GAWRs by designated size and load capacity. Currently the load capacity being fitted to new trailers is 10% above GAWR. In other words, a trailer with 7000# vehicle certified axles will have tires that provide 3850# of load capacity, each.
In the past, Keystone has been known to offer optional tire sizes by brand name. The most popular one was the GY G614, having an LT in its designated size. At the time those options were offered, GY was the only tire manufacturer building that designated size. However, when optional tire sizes are used, the change MUST be done prior to first sale. Vehicle certification requires tires fitted to the vehicle to be the same designated size as those depicted on the federal certification label at the time of first sale.
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