Originally Posted by
dsaul
The valve just won't allow enough volume to enter the tire, quickly enough to seat the tire.
That’s not true. I’ve got five tubeless wheelsets and over the years fitting many 650b, 700c, road and gravel tires— maybe over a dozen pairs— I’ve never had to remove a valve core to get tires seated.
I’ve used valve stems from American Classic, Easton, Muc-Off, Winspace, and Supacaz, but I can’t imagine valve brand makes a difference, so if anyone is experiencing trouble around this issue, it’s probably due to their inflation equipment.