The self sealing tubes only work well when the puncture is very tiny. The sealant works by solidifying in the puncture. A tube does not give much thickness to puncture in. We used the stuff in implement(really big lawn mower) tires and it worked great, but these tires are pretty thick and no tube. The sealer would stop a 1/4 inch drill or a twentytwo round and only lose a pound or two. There was a demo gadget in the retail area. It was a wheel barrow wheel on an axle with a nail on a lever set to puncture it. That thing had hundreds(thousands) of punctures in it and only lost a couple of pounds a week.