ItsyRV wrote:
Since millions of vehicles have extensions without issues, you may just want to head over to a truck store and buy a set of adequate valve extensions with decent supports and install it yourself.
But even more millions of inside duals are checked/aired every day,
without using extensions.
Most MH chassis are made by same companies that make trucks. I can't see where the profit is for them to buy special wheels, or even valve stems, to put on MHs. Spend the cost of extensions on gauge and air chuck, will last rest of your life.