I was curious because of the limitation JHurt had when getting his R1W tires. He was limited to 20" on the front with simple reversible wheels. Yours appear to be 24" with multiple adjustment wheels?
I actually thought that was what I was going to get... When I ordered it the week before thanksgiving. I said I wanted Radial tired with cast rears and the width of the tractor to be around 77 inches ( To work with the implements I already have) And to make sure the front tires are in the same tracks as the rears. I puled up to the dealership on Friday and that is what was there lol And am tickled to death lol It may be because these are the Goodyear Low Side Wall (LSW) tires that require a larger rim.
I spoted this new you tube vid seams to have the same tires only set up for a different width.. and most of the tires on the lot in that vid have the same setup Kubota M76 4x4 Cab Tractor - YouTube