Got back from a trip to Frankfort, blew a trailer tire and bent a wheel on the way up on US-131. That old familiar distant rumbling sound started, and I took my foot off the gas and got ready for the inevitable. Then bang she went and the hazards went on. 15 minutes later I was back on the road with the spare changed and a shredded tire and bent wheel in reserve. Got a replacement tire and steel wheel, a Carlisle bias ply unfortunately. That was the only thing I could get in the time frame I needed it for the trip home. The guys at Tire Wholesalers Plus in Fremont are good. I have bought tires from them in the past and am satisfied with their service. I pushed my luck with the tires, as they were 6 years old with thousands of miles on them. I knew I was living on borrowed time. The piper demanded, and received, payment. 4 years is my general guideline for trailer tires, regardless of mileage. Trailer tires are susceptible to aging in my experience and are generally far lower quality than car/truck tires. I will probably get two more Goodyear Marathon radials, these are my favorite trailer tires over the years. I will keep the two remaining original 23 year old steel wheels and use the white replacement wheel with Carlisle bias ply as the spare.