To date, this tire has been hard to find. Other places claim to have the TNT version, but actually don't. This one is the legitimate TNT version. On Stan's Alpha rim, it mounted up super easy - needed only a floor pump. Tire holds pressure for nearly a week before needing top off. So far only used in gravel-grinder type races, so have only run pressure down to 40psi. I trust that this tire could go quite a bit lower w/o burping.