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A year back I bought some tubeless ready nobbys pacestar. they went on OK (Shimano mt65) and inflated but they took weeks to seal properly and still seep tiny amount of sealant from the side walls.
recently I bought the nobby tubeless pacestar double defense. they went on great, inflated first time and have not lost any pressure or lost any sealant through the side walls. very impressed!
I have some NN tubeless, and whilst they stay up fine, were a pain in the ass to inflate. My new ghetto tubeless inflator has helped 🙂
NN TR Pacestar on ZTR Flow EX. Went up just fine with a track pump. Seeped for a couple of days then seemed to be fine. A couple of times I've taken the bike out of the shed to find the rear is very soft. Not totally flat, just very soft. Not sure whether this is a fault or just a sign that I got a puncture and the sealant did its job. But I just pump it back up and go ride and they haven't let me down yet.