Just went out & measured my rear tires, on the Kioti CK27.
Looks to be aprox 61", measured from the outside of the tire cleats. It has the 15-19.5 R4 ind tires.
From what I can gather, the L2501 Kubota is real popular. After having used this Kioti for about 12 years, IMO, 25hp is plenty of power to do everything I'll need to do with a tractor. Runs a 5' bush hog just fine, & runs the loader just fine. It'll actually run the 5' hog at a ground speed that is to ruff for me. So, I run it one gear lower, just to make for a smoother ride. I'd say this tractor has as much, if not more power than the 30hp gas Fords my Dad had. But, I haven't tried to run any hay balers, or heavy discs. For what I do, a 30hp tractor would be a waste of power & money.
https://www.kubotausa.com/docs/defau...eets/l2501.pdf
https://www.youtube.com/watch?v=Bj1yyAsvXmk