I have been riding on 29er Geax AKA's TNT on ZTR Flow rims for about a month now. I am about 100 kg and run about 2bar back and front without any problems at all. It is a real bugger to fit the tyre on the rim (so I'm told by my LBS), but once fitted you don't get one drop of sealant leaking and the pressure stays pretty even. I don't know how the AKA's will handle wet terrain but they have been good in dry conditions (they look a lot like the Kenda Small Block Eight - great in the dry by not too good in the mud) Hope that helps.