Caliper

In my quest for winter traction, I found a pair of Vee Snowshoe 2XL tires for my fat bike. My rims are Mulefut 80's set up tubeless with Sun brand rim tape. Anyways, while inflating the front tire to seat the bead, one side blew off the rim... Not sure of the exact pressure, but my pump was under 20psi and it tends to read higher than reality. Now, the side that blew off definitely has a broken bead and won't stay on the rim. I really think that it broke when it blew off - both beads needed some tire lever assistance to get on the rim but now the side with the broken bead can be easily slipped on.

I've got the other tire on the same rim and holding air but stopped at under 10psi. I'm nervous to put more in now and if I push the sidewall back I can see that the bead isn't seated at all yet. I'm worried being new to fat bikes that I'm doing something wrong any may break this one also... I only used a pair of Park Tool levers and a floor pump to install the first tire. No air compressor or other funny business. It was tight going on but not insane. Is my rim too narrow? There is some bulge, but 5" tires on a 80mm rim don't look crazy to my eyes. Should I just suck it up and add pressure until this one seats?

qclabrat

did you try with a tube first? I'd be surprised the bead broke so easily, but the tires were used so it's possible
Rim should be fine, even if not optimal for tReplyhe 2xls

rumrunn6

wire beads break. not a fat tire but ...