A-Class had these prototype enduro/marathon wheelset on display at Press Camp. They’re called the VED2, will weigh in around 1650g and have a 28mm rim width (outer width, probably about 24mm inside). Look for them in September, targeted at epic Trail riders in the U.S. and the marathon crown in the Euro part of the world.
The wheels will only come as Centerlock hubs, but any 6-bolt adapters will work.