My 2011 Rancher has 24x8-12 up front and 24x10-11 rear. Why the different
wheel size front and rear? I was looking at ITP Baja tires but no 11 inch wheel
sizes available. This lead me to the question. Can I run 4 wheels all the same size as long as over all tire size is the same on all four?

 

Typical Honda for ya. You can go to a 12" wheel all around if you prefer with no problems. I've never understood some of the things they do. A buddy of mine had 11" wheels all around and he was having a heck of a time finding tires he liked. Switched to some 12" wheels with no problems. You can get oem 12" wheels if you don't want the flashy wheels like from ITP.

 

I have the same problem, 12" rims in the front and odd ball 10" rims on the rear it makes tire shopping much more limited for sure.

I though it was strange that the 420 Rancher has small 24" tires even the the smaller motored 350 and 400 Foremans came with 25" tires in there day.