I’ve been running Ones on Giant carbon rims for a while now. They went on and up incredibly easily and I only added some Stans for good measure. I’ve had one large puncture which, nonetheless, sealed itself enough to get me home at night in the Alps…. There was a lot of fluid sprayed about, though! I’m really impressed with the whole thing. The tyres roll fast, are comfortable and grip well. My mate borrowed the bike and was also impressed. I got my tyres from Germany where there tends to be stock. Having gone tubeless on the roadie, I can’t understand why it’s not a more widespread practice, as it is in the MTB world. I do carry a spare inner tube, just in case, but that’s only because I favour a belt and braces approach!