#3 Post - Delayed welcome from me too!
I see by your profile it is a Fleetwood product, but not the year so I could not look it up. What size ties do you have on that F450? (225/70 19.5?)
Tires are subject that will usually spark various forms of feedback!
I always feel that since those little patches on the bottom of the tire that make contact with the ground, are the only thing making that rig go forward, turn and stop - get the best quality tire that you can. Cut back on budget for wine and beer (They have box wines, do they have box beer
!), or other items, but pony up for good tires.
Now, what are good tires? That is where the opinions start to jump in... Here are some thoughts.
-Tires come rated as Tier 1 (the best), Tier 2 (Solid and safe, and usually a bit less expensive and Tier 3 (Well, you can kind of put that one together. (And I suppose, now a sub Tier 3, with many tires coming in from China, that are just unknown.) (Note: Many good quality tires come in from China, so not slamming all of the China tires manufactures!)
>Here are some tires you might want to research, in no particular order:
-Continental HSR & HSR1
-BF Goodrich ST230 (Can be purchased thru the FMCA Tire Program, and save some good money.)
-Michelin XZE and XRV
These are all Tier 1 and Tier 2. I did not include Hankook, as I could not remember the specific model of the tire, but many are very happy with their performance, the same with Cooper tires. Both are in the Tier 2 category.
Mentioned the FMCA tire program, savings pays for a year of membership, and they can be used to purchase Michelin and BF Goodrich (Made by Michelin.) with some substantial savings. Also, some Costco's will install 19.5 tires, and all will order you in a set, but then you need to find an installer. TCI is a national chain, and that can e good while traveling to have a place to go in get help if needed.
No matter what and where you buy the tires, be sure to specify that you will not accept DOT (Tire Born On Date, when the tires were made.) of greater then 6 months old. I recommend balancing all the tires, including the duals, though some feel the duals do not need it. And, get your four corner weight, and consult the tire manufacturers PSI charts for your applications PSI setting. (I add +5PS to that, as a safety cushion.)
Last two inputs. Do not let a tire dealer talk you into a Load Range that is not up to the job for your truck. The placard in your truck, should show the tire size, and Load Range, I think. Finally, if you check in the owner group or possibly the chassis group forums for you RV, you might ask if anyone has 'plus sized' their tires safely. You may not want to, but, plus sizes could possibly provide a different tire model that you could be interested in. And, usually plus sizes puts a little more meat under your chassis for while on the road. Not all chassis can do this safely, so do this after good research. And, it is OK to get a higher Load Range, but never a lower rating. (No real reason to, unless you feel your weights are on the high side. But, an option.)
More will provide options for you too.
Good luck, and have fun, and be safe!