Hello Woodlot,
Sometimes you might go to the Deere website and choose the model of tractor you're interested in and then click "Build Your Own"
There you'll find a bunch of info, sometimes there are tire brands with the tire sizes offered.
Don't forget to click on the photo icon, where you'll find more info.
also, the User Manual section has a bunch of info.
I think JD has everyone else whipped on their website.
Though the actual photos are few [they all have too few photos]. But I think they really would prefer that you get down to the dealer to kick the tires. /forums/images/graemlins/laugh.gif