before you have to buy a new one. i had a flat, got it plugged and she was good to go again but the tyre guy said you can only plug a tyre once then if you get a flat again you have to buy a whole new tyre... which scares me, this $280 bridgestone is one month old. knowing my luck i might get another screw in the tyre again. what are everyone's thoughts on this? only once or more than once?