Stock 2014 550 Grizz Mudlites

Plan on getting xtr mud lite tires for my 550. Thought I was going to get 26" but now am contemplating going 27".
Looks like I’ll have the clearance but not sure.
Plan on using the stock 12" steel rims.
Anybody have thoughts on issues I will have going with the 27"tires. Bike is totally stock, no lift.
Thanks
Scotty