I had older Carlisle radial trailer tires, they seemed fine and I had no complaints. About 10 years ago some manufacturer had a bad run of trailer tires with a high failure rate, but I do not recall the brand. I have some 12+ year old bias trailer tires on my Yamaha Waverunner trailer, and they are in great shape. I think they are Maxxis brand. I would think they would have started to crack or get ozone damage many years ago, but they are still kicking. I should probably at least get a mounted spare just in case.