As opposed to old all D17s I or my family have ever owned have had 16.9x28 with one having 18.4x28. That would include about 12 D17 tractors in the family.
13x28 is the same as 14.9x28. Just updated to reflect a different measuring point on the tire.
Nebraska test shows 16.9x28 so all tractors sold in Nebraska must have 16.9x28 as standard equipment and anything else was optional.
16.9x28 also looks like a better fit for a D17.