What's the date code on them? It's in one of the ovals near the rim. 4 digits - the week and the year. I had exactly the same thing on our previous 5er. The tow master tires, 15 Ds, blew apart every 4 years, just like clockwork even if they were used much or not, stored jacked up or not and covered or not. The axle weights and 6 lug hubs allowed me to use 16" LT. I got 16" 6 lug wheels from etrailer,$196, and Dunlop LT Es from discount, $604. $800 on the button and no more problems! I will go to LTs on this 5er when the STs are about 3 years old, if they make it that long. I store it jacked up so I spin the tires before every trip to make sure there's no humps or bumps. I hope I can catch a bad one in time. The first owner blew out a Carlisle and he put the same thing back on. I'm more impressed with these carlisles than I was with any of the tow masters which always had humps in the sidewalls, from the get-go. Craig
