u/Coalrocketeer

I've been looking around for rear racks for the 850 v7 stone and all of the brands I've found have a limit of 6kg (13lb) or less. Is this the brands coverings they're ass or is there something keeping them from being able to put a decent rear rack on the V7? I wanted to put a large hardcase on the back for more storage when I had a passenger but at least with my current options, a decent box would go over the limit if I put anything in it. Anyone with real world knowledge either about the v7 or rear racks in general would be appreciated?