Is it time? The brand... This T300 got 1,7xx hrs. out of the OEM Bridgestone tracks. Our equipment manager told me proudly that he found aftermarket replacements a lot cheaper. The replacements were Soliddeal.....they lasted for less than 300 hrs. They were replaced with these Prowlers that lasted for close to 800 hrs. Here is what we just put on... All of our CTL's are experiencing pretty much the same thing. I remember a Caterpillar advertising campaign where the tag line was, "The cheapest price isn't always the cheapest price".