Tire & Wheel questions

Looking to replace stock wheels and tires on 2009 Outlander max 800r. Believe tire I want is kenda bearclaw htr. I’m thinking the rim I want is itp ss 312. The question is what size rim 12 or 14? In 12 I can get a 26 or 27 tire. 14 is only a 26. I don’t want them to rub and don’t want to use spring spacers. Any help would be great.