Combines larger tires needed

I would recommend going to a wider rim. The rim used on the 23.1x26 is 20 inches wide, while the 28lx26 requires a 25 inch wide rim. You might be able to mount the 28lx26 on the 20 inch rim, but the tire will be very round across the tread foot print.

Since I want a larger footprint to elimate tracking, don't I want the tire to be more round at the footprintIJ Or should it be crowned for tractionIJ

where do you live i have 2, 28l x26 on the wheelsIJ

You want to be as wide as the tire manufacturer recommends, and in some cases wider. As far as I know, you don't have much risk of damaging the tire if the rim is a little wide, but too narrow of a rim is a common reason to have tire trouble.

I live south of Toledo, Ohio. What kind of shape are the tires inIJ

Thanks .... I understand your point.

i have a set of 67-34-30 tires that are 90% and will help a combine a bunch on wet soil. they are on gleaner rims but i am sure the center can be replaced with one of the proper hole spacing. it is a straight plate wheel call me at 217 825 3982 or email at above address James