just had a puncture repaired on the front of the 100 GS. Found someone who could do a tubeless repair only to find I had a tubed tyre fitted with NO inner tube and a tubeless valve. Returned home and checked the rear and that's marked as tubed, so let's see what's in there tomorrow. Tyre guy reckons this is v dangerous. I can't believe it works. I've done about 1000 miles on these tyres.......