I've just contacted these guys http://www.alpinaraggi.it/ about getting a tubless conversion kit for the rear on my KTM Adventure 990. Not sure if anyone else has tried them. If not,I don't mind being a lab rat and keeping you posted on progress. I should metion that I've also bought a Tubliss core to convert my front. First real test will be the Elefantentreffen riding on Contis TKC 80s.
Alright mate theres some blurb about tubeless knobblies in the TBM mag,its a type of rim clamp.You say your doing the Elephant Rally,done the last two its a right laugh,let me know which way your heading out may see you on the road.
Still in the Middle East with the Navy until early December so getting hold of any decent mags or doing any proper planning is out of the question for another couple of weeks. As a matter of fact just sorting anything out is a complete nightmare. Fortunately I have a very understanding (and very pregnant) wife that sorts out all my logistics...