Folks...most tire failures are a result of owner neglect. One poster on this thread talked about his automatic system...nice but many times they're unreliable. I've bought and tested those units and don't recommend them.Nothing is better than a eyes on thump of each tire. And by neglect I mean every time you make any kind of stop you should be thumping your tires, not kicking but thumping with a more reliable instrument. To my customers and clients I suggested using a 1" id by 2' piece of steel or galvanized pipe. Wood clubs work but not as well as pipe.