We have a 2015 23D International Serenity and the "D" stood for dinette. There were also the Flying Cloud and International Signature trim lines for the 2015 23D.
They also made a 2015 23FB (for front bedroom), in the Flying Cloud, International Signature and International Serenity.
The stock 14" tires and wheels continued in 2015 thru 2016 and the 2017 models migrated to 15" tires and wheels as standard.
We upgraded our 23D to auto-adjust 10" drum brakes and 15" Michelin LTX (P) 235/75R15 XL tires mounted on 15" five lug SenDel T03-56545T wheels with Centramatic "200-221 standard part" wheel balancers and a Dill 1506-453 TPMS system.
I think Airstream changed the designator to fool people into thinking this was a new floor plan....
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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 w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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