i was having the same problem with mine, well started off that way. now one of them lasts about an hour and the other about a day. the bad one actually has a small hole starting where the corner of one of the paddles is starting to rip off. i called skat trak and they said it was because i was running less than 5psi so its my fault. nobody i know runs higher than 5psi where i ride, so whatever. a couple people have told me that i can smear some tire patch glue on the inside and that should help/fix it. i havent tried yet because nobody around here will dismount/mount these tires, so im gonna have to wait til i get back to the dunes so the bike shop there can do it. hope this helps.