Hey there Speedy,
As the review says, "Schwalbe stripped this tire down, leaving only the absolute essentials intact. Limited gripping ability and a lack of puncture protection limit these tires to race days". That said it is not a rated ust or tubeless ready, but if its a race day tire, well, all bets are off. I will be picking up a set of these to go mobbin' in moab. Should be an exceptional tire on the slick rock (big volume and minimal tread). I'll probably run them tubeless for the heck of it. I'll post when I return, but I will be packing spare tubes for sure.