Demanding replacement tires on a trailer before it’s purchased.

[CWtheMan]

The regulations do not say yes or no. Here is what they do say;

“The tires on each RV trailer at first retail sale must be the same size as the tire size on the labeling.”

So here is what the dealer can do without angering the manufacturer. They can change name brands with the same size and load capacity tires (labels not effected). They can upgrade to a manufacturer’s optional recommendation (labels must be changed).

That’s just about all that can happen without the dealer getting into trouble with the manufacturer. The manufacturer cannot show predigest by giving a trailer buyer any special considerations. In other words, they cannot give a buyer tire sizes that are not on an approved options listing for that model trailer.

Changing tire sizes before the trailer is sold and letting it roll off the lot without changing the placards is a very serious safety violation. A dealer’s manager is not going to knowingly let that happen. The monetary penalties that can be assessed by NHTSA can be very severe for such actions.

You can bump it up a load range because at the given inflation on the placards the increased load range tire would still provide the load capacity at the manufacturer’s recommended cold inflation pressure for that tire size.