I made the switch to radials back in the 80's and I wouldn't run anything else on my line haul equipment. Part of our 15,000 PM is to check the dates on tires and take anything out of service that is 4 years old. Although Michelin claims that the carcass should be recappable fo7 years, its not worth the risk. In fact I sell carcasses rather than cap them. We do not carry no spares, and a blowout on our aluminum bulk trailers can be a very expensive ordeal. However, I grab every used nylon bias tire I can find to put on storage trailers because they don't blow out from age. This is why most container chassis trailers still use bias tires. And you can leave them parked in bad neighborhoods and no one steals them. I have been in the trucking business for 49 years, but I am clueless as to what putting them through a heat cycle every 30 days means.
