I have been looking for my Tyrod II as well. They came with 9/3.50 x 4 tires.But the 10/3.50 x 4" fit great as well and give you more clearance. Also, the 10/3.50 x 4" is a common dolly tire. If they are the same tire I have read that the Carlise 410 - 4 works great, don't get harbor freight, as tempting as their cheap cost is, they wear out in literally hours. This is the tires I am looking at: