Hi Steve, Thanks for the reply. It was originally a toss up between the 280 and 250 series. The problem is that my Dynasty came with the 75 size and has a diameter of 40.3" the 280 comes in that size the 250 is 80 series is 41.6" Diameter. I think I will need a reset of the odometer/speedometer, a trip to some Dealer which I never look forward to.
Since my 2001 is 36' long and relatively lightweight I can still run lower pressure in the 280 series and have plenty of reserve which should transfer to a better ride. It all depends upon which I can get at a better price and newer build date.
I have been told that I can install the 80 series with no problem the next year Monaco went with that size.
Sad thing for us is we were all set to buy these in Iowa last March but we had some problems with the Norcold recall and had to return earlier then planned, the price has gone up I have heard around 10%

Robert