change tires from 19 to 22

Not sure what trans you have, but changing tire size can really mess up the shift points. I do know someone who went up in diameter with the Allison 6 speed and his shifting was really messed up. Of course transmissions can be reprogrammed.

Goldencrazy wrote:
I notice that people change the tire diameter on cars frequently and in fact we increased the diameter of our tires by 1 inch on our Smart Car and some folks increased by 2 inches. That is all the wheel wells will tolerate. For me the tires were also wider. Made for better ride and stability. I understand that coaches with the 22 inch tires ride better. I seem to have plenty of wheel well room on my Vista 30T. Why shouldn't I consider increasing the diameter when time to change tires. I understand that width might be a problem if I increased because of distance between duals. Any thoughts?

Surely you know that you can't simply change the diameter of the tire without changing wheels as well, and that is going to be a really expensive change with very little payback.

As for the larger tires riding better, that is debatable. It may be true on a chassis designed for the larger and heavier wheel and tire, but adding them to your light and short chassis could just turn it from a "Bread Truck" ride to that of a "Log Wagon".

I have an older 16" wheel coach and I hear folks with the 19.5s and the 22.5s with the same complaints that I have.

Weigh your coach and set the right tire pressures.

On Michelin Tires website they have a chart on what tire that you can move up or down to.