The oem blades measured 31" on my 2019 Vista..I replaced them with readily obtainable 28" from Autozone..they sweep 11/2" lower and I really don't feel the need for anything longer...Direct replacement no tools needed...
My $5 wiper blade solution... For a 2004 Itasca Horizon 40AD
...Today I was in Walmart and picked up some replacement wipers so hopefully this information will the OP with is newer coach, but if not then may this reply will help a lot of people who has double-wiper arms... and are are both frustrated with the cost of Trico Wipers and the difficulties of finding their size... almost everywhere.
I don't know when Winnebago went to a different wiper design on their Class "A" RVs that uses a double-panogragh design? ...Does anyone know?
I'm guessing everything before 2010 might use this style, but that's just a guess.
If your wiper panograph uses the same wiper as my coach, you are in luck!
For years I searched here and there and every time I found a Trico Wiper Display they would be out of my wiper type. And when they had it it was something like $20-$25 EACH! ...What a rip-off!
My wiper is about center support is ~3/8" wide, maybe 7/16", and it has a screw and tiny... tiny nut holding it place. And all the replacement blades that I looked at, don't have the hole for the screw. Of course, if you found a narrow enough wiper mount, then you could drill that hole if you had too, but why do that if you can buy the right wiper for $5 each?
First let me say, the wiper needs to be able to move or float or drag across the window; and it must conforms to the curvature of the windshield. And while my RV calls for a 24" wiper blade, you can use a 26" if that's all you find.
However, from my experience, the 26" blade on my windshield does not work any better than the 24" blade.
Anyway, for $5ea. at Walmart, you can buy this band of wiper (see picture) that works like any wiper if you ask me. So, hopefully, this style will work for you too. And BTW, at $5 each I keep an extra set. (Take that Trico!)
TIP: Since you will be examining your wiper arms, you should also check behind the panograph and tighten any loose nets in the wiper mechanism... and apply some lube.