I am getting a number of PM asking that question. I don't mind but constantly covering the same questions over and over is just not efficient use of my time.
Sorry but I don't know all the different Airstream models and tire options.
Lets start with getting the basic info needed to make an informed suggestion.
Please tell me the size shown on your placard
Be sure you give me the complete size and not something like "225-15". This includes the P or ST or LT before the numbers.
What is the Load Range? (This replaces the old "Ply Rating")
What are the axle ratings on the placard. Not some sticker on the axle.
GAWR= xxxx lbs
What is the recommended tire inflation on the placard?
Next about you and the RV
Do you drive faster than 60 mph? Faster than 65?, 70? 75? 103?
What does your RV actually weigh. This means the number on the weigh slip not what your friend has on his RV.
Even better you need to follow the instructions on the worksheet HERE
if you can't get individual weights from RVSEF
Do you have a TPMS for your RV? If not why not?
Finally, please do not ask what the "Best Tire Is" I have covered this question and the quality questions in my blog. You can read all the posts related to those issues there if you are really interested.