I went on the Michelin commercial tire site to see how many tires are made.
If you have a 4spd manual, a 6-71, 8V-71 or 6V-92TA, you don't really have enough power to take advantage of drive tires. . .
I said that the lower horsepower buses won't be able to take advantage of a drive tire - not that they can't handle a drive tire. With the lower horsepower, it is just plainly hard to spin the tires - unless you're in really slippery clay type mud.