The SenDel wheels used by Airstream have a "zero" offset. That is why I ordered the same wheels and tires as Airstream uses to preclude clearance issues on our new trailer.
I lack the knowledge to comment on the more "mature" Airstreams still being enjoyed.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels