From what I can see in Hunnicutts' Stuart book, photos of the Stuart and the all of the earlier prototypes and variations show the same, or similar spoked road wheels and flat pad track. I guess the Mato Sherman track would work if you wanted to spend a lot of time grinding off the chevron on each piece. On real Shermans the road wheels are a little larger than the real Stuart. How accurate do you want to be?
rex