Originally Posted by
jadocs
Of course the primary benefit is being able to retain enough air in the tire where the bead stays seated enabling you to work with the sealant very quickly.
This is my primary interest; on my old wheels, Reynolds Assaults, the beads stayed locked with any of the tires I'd tried, come hell or high water. With the new wheels and tires, hookless Zipps 303S/Schwalbe Pro One Addix, the beads sometimes pop off and back in to the center of the rim bed at very low/no pressure. This makes it a little more messy and wasteful (seating the beads with sealant in the tire and the inevitable bit of blow-out before snapping in to place).