I was sick and tired of getting flats on my tail dolly and having to fix this past summer. (Also not interested in solid tires due to the hard ride.) I found this and thought others might be interested. It is one heck of a deal for 20 bucks. Includes tire, tube, hub and axle. Works in a pinch so you can just swap and go fly - enabling you to fix the flat on your regular wheel at later time after you land. Just thought I would share and I'am not affiliated with this company.

http://www.monsterscooterparts.com/r...-assembly.html

Darren "U2"