1025R lists 26 x 12 x 12, A 4110 lists 12 x 16.5
It appears rear tire sizes can not remain the same for conformity. One would think less sizes for a dealer to carry, less confusion for owners, and probably rim off set differences. Both tractors are in the same class. On top of a multitude of style changes can't they limit many details to engine / transmission choices ? Probably a low bid manufacturer specification they offer.