Will a 13.6x28 tractor tire fit on a 11.x28 tractor wheel?

Simply put... YES. In fact, that's what's exactly on my Ford 871 tractor!

BTW, a 13.6-28 tire would actually be happiest on a 12" wide rim, but will work on a 10", 11", 12", 13", 14", 15" wide rim.

When changing rim widths, what will change is the overall height profile of your tire.

It's best to stick with whatever is on the other side. In other Words, keep your rear tires AND rims matching sizes if at all possible.

Kudos! ~AJ