Matt I have 27 in all the way around on mine. No problems at all. 27x10x12
Tailrotor I put the same set up on mine in November. I noticed the other day the lug nuts are all rusting. Are you having that problem?
I have a set of 27" Essex surefoots on itp black delta steel wheels in a kit from KG motorsports. I re-used my original nuts and bolts because they were higher quality. They fit fine on my 2014 RTV-x1120d. Thought it was a weird setup having two lug studs and two lug nuts per hub though. Those 27" Essex tires are heavy (39lbs apiece) and will decrease your speed substantially. I am going to sell mine and get the 25" ones(23-26lbs)...they're just harder to find because they sell out and there is ONE distributor in the nation that handles them. Apparently they make these out of materials sourced directly from the core of the earth.
The ones on mine are rusting as well, poor quality chrome.
I understand basically what tire sizes mean but would anyone be able make it simple, one of the places where I get lost is a 12x8 rim with a 12x10 rim? What are the parameters like can a 12x12 or 12x11 tire fit a 12x8 rim? Sorry if these are stupid questions but I did a google search and it's still not clear as mud to me. Thanks in advance