somewhere I read a post stating that there was a difference in the rims for the airstreams(or other trailers for that matter) and a "regular wheel would fail". search the forum and verify.
some wheels center on the hubs and some on the lug bolts. there was even a picture in the post of a ugly rim failure. I know it will cost but better safe than sorry , order rim from airstream would be best bet.
"Forbidden Wheels Clubhouse Recon Team"
2004 30ft Slide Out with Hensley Arrow hitch. Pulled By 2010 Dodge 2500 Diesel 4x4 Megacab