I was looking for a picture of it, but I guess I don't have it anymore...
I have a lawn tractor that I used to haul in Cara (my old Caravan, if you don't remember) that has 14" Keystone Klassic wheels on the back, with 245/65R14 tires on them.
That tractor is an AGWAY model, and it came with 5 lug hubs on it. I had to drill the hubs' existing holes (they were threaded) and put wheel studs in them. I still have to get around to making the bracket for the calipers and then finding a good set of rear rotors that will fit behind those wheels. I have full intentions of that particular tractor having the ability (after modifications) to hit nearly 100MPH. It's a drag-rig, so why not?
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"