Lots of other reviews mention the valve is in the wrong place. That is absolutely right. I broke the bead, put the tire in and as soon as I started inflating the valve retracted into the tire. I tried to hold the stem with pliers and my nozzle caught a bit on the valve threads. Nothing worked. I took it to 3 tire shops, they didn't feel like they could help. I would have sent them back but they were partially inflated, buried in the tires and had marks from the previous tire sealant. I solved the problem by buying new wheel and tire combos from Revain and it worked like a charm. After 45 minutes I was ready to go. Look for Arnold 490-325-0012