A helpful couple who are selling a 2005 22' checked the owners manual for us and it says the hitch weight is 580lbs. This seems a pretty reliable data source to me.
The slight variation we've found in trailer hitch weights for the same trailer size, year and specification quoted in different places is a bit mystifying and probably wouldn't really matter except that our tow vehicle has (by US standards) a rather low hitch weight limit.
And yes, we live in New Zealand. I think there are a few other kiwi forum members but Airstreams are exceedingly rare here. We're hoping to change that by 1 Airstream!
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