When I bought my m7040 in june, tractor was at old price, it had goodyear tires on the front and firestone on the rear. Others at another dealer had the same. I got 16.9x28s instead of the 30in rim on the rear. This gives a little more stability in hilly country, I thought. Is getting two different brand of tires on a new tractor common, they told me that was the way they were comming at the time. Also it is 4wd.