The black round ones areprobably the BEST answer. I've had issues with michiblows, others inthe past "firebombs" as they were called for a bit. I have yet to have a literal blow out with Cooper or Toyo.Or Firestone for that matter. I've only had one set in buying tires for 30 some odd years. Good Years have been a******shoot. MOst seem to last 40-60K miles. My BEST mileage tires have been Toyo M55's on the rear of my dually with over 70K miles. I was told I would get 80+ out of the GY Unisteel tires. got 50K! A few have even worn out as little as 25K, and blow up!
When one is running as many as 5 trailers, 3 trucks in a business. One uses and goes thru a lot of tires. Michilen has not been a best buy for me. Nor has GY overall. Cooper, toyo have been the better bang for buck buys.
Marty