Ed, I'll probably be doing it the quick and dirty way- - - - -making 3/4" thick adapter plates on my lathe and bolting them onto the hubs, then attaching the 24.5s to the plates. The tractor might see a maximum of 15 MPH on a long downhill run with a tailwind!
LOL!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!