Ok, so I just put a set of brand new zillas (27×11 and 27×9) on my brand new outty 850XT. I got about 4 hours into my first ride in the mountains and had holes in the sidewalls of both fronts. These tires were great on my old rancher but new machine is a whole new playing field. I am a very aggresive rider. All that being said, I’m changing up tires, and wheels while I’m at it to keep the light weight zillas(with tubes) for local mud and I’m going to buy a set of 14’s and tougher tires for the mountains. I’m thinking of maybe going with 27×9 all the way around?? Or should I go 27×9 front and 27×11 rear? I’m inbetween the pitbull growlers and the grim reapers. So if anyone could give me there opinion on widths and chime in to maybe help my decision on tires as well, I like the growlers better but the reapers weigh way less.