Tires and clutch combo

hello, I purchased a used 2012 rzr 800 a while ago and I notice that my tires look a little bigger than others. The fronts are 26x9x14 and rears are 26x11x14. I have 2"spacers and a lift. the front tires scrubbed the inner walls so I cut them out.
I read that going bigger and adding a after market filter and exhaust requires recalibration of the clutch.
I have a after market fiter and big gun slip on with mid pipe. I also have a big gun EFI controller on it. My question is, what clutch should I get to recalibrate all of this? on ebay I don’t see 26" tire clutch upgrade. I only see 27" and up. I wanted to stick with a kit close to the $177 dollar ones. any suggestions