So I am looking at going to a different tire and want to see if anyone is running or tried to run the 27" Zillas on their touring. I know that they will fit fine on a standard, however the touring model has the rear passenger foot rest braces that can be problematic for rubbing issues. I've read some posts regarding the 850 touring guys trying 27" or 28" zillas but not sure how the 570 compares to the 850 T as far as wheel well clearance. I typically run 5 PSI on all four corners (little lower in rocks) and 5.5 psi in rear if wife is with me. Seems from what I have read the Zillas measure true to size measuring them at 7 psi unloaded (not mounted on machine). Guys measuring on machine seem to get anywhere from a 1/2 inch to an inch shorter depending on PSI when mounted. However I'm not sure how much the compression would help prevent rubbing at the footrest braces. I already have delta steel 4+3 rims on the machine. Thanks for any help.

 

I had 26x9 fronts and 26x11 rears Zillas on my last Yamaha 4x4 350 Bruin with plenty of room to spare , and they are a mid chassis not a full size chassis.

27" on a full size frame ATV should be no problem.

 

Its not really the frame size thats the issue. If I had a standard 570 sportsman I could probably fit 28s, but the touring models both 570 and 850 have a brace for the passenger footrest that goes back into the rear wheel well where it attaches to another piece that connects to the frame. I'm fairly sure that the answer to 27s is going to be no or you be the guinea pig, which I'll decline. But I thought I'd see if anyone had pulled it off with success. Here's a pick of the brace. This isn't my machine. You can kind of see in the one pic where the tab has been bent up. I think that guy was running 26" bearclaw HTRs.

 

I see what you mean on your third pic. Remember every inch larger on a tire only means 1/2" larger on one side of the tire.

 

Yeah, going to 27s I'll gain close to an inch since I run 25s right now. The Artrax Contrax tires actually run about 25" mounted on the machine with 5.5 PSI. I can see where they rubbed on the brace bar when I had them on my stock rims, so I'm gonna go with the answer being no on 27s without doing modification to make room. So I'll just go with 25s or 26s. Been looking at the Zillas in 26" and ITP Mayhem in either 25 or 26. Like the look of the STI Outbacks, but there just isn't a lot of reviews on them out there. I know they run narrow.