Welcome to the forum! The turf tires are mounted on 14" rims, the ag tires are mounted on a 15" rim. The turf tires are 8.5" wide and the Ag tires are 6.7" wide. What all of that means is that you will need new rims for the Ag tires of the size you listed. I'd explore what Ag tires are available to mount on your 14" rims. Keep in mind that your tractor is a 4 wheel drive and the outside diameter of the front tires has to match the diameter of the tires you have so the 4WD will not be out of phase.