Maybe I got lucky, but I mounted some well used Serfas Sheriff tires on a new set of tubeless rims and they seated and sealed very painlessly. The bead locks in very solidly and takes some effort to unseat even at 0psi on the tire. Honestly, they hold pressure better than the tubeless ready tires on another bike. Pressure is fairly low being that they are 52mm tires, but I'm happy. Of course, YMMV.