The most overlooked tool for changing a tire on an Airstream is a torque wrench. It's critical because it's the only way you can be sure the lug nuts are correctly tightened. Without proper tightening the wheel can come off while towing, with catastrophic results!
Our choice is TEKTON, a premium brand with a solid reputation. You can always find a cheaper wrench, but when you're by the side of the road changing a tire you'll want an accurate and well-built wrench you can count on. This wrench is all steel and pre-calibrated so it's ready to use.
This is a 1/2" drive wrench that measures from 10 ft-lbs to 150 ft-lbs, which covers all of the wheels normally found on an Airstream travel trailer. It comes in a molded red case that protects it when not in use. (That's important, to preserve the calibration of the tool.)
NOTE: We include this tool in our Tire Changing Kit so if you plan to order that complete kit you don't need to buy this wrench separately. We offer it here for people who already have the other tools needed to change a tire.