ChevyChad

Thank you so much for the info. I am still waiting for mine to go into production (2018) but I want to put 37's as soon as I get it. I have 37" Nitto Trail Grapplers currently on my jeep and doing 35's on the Raptor would be like downgrading. Even 37's look small to me nowadays. Hopefully by the time I get it there is more info out there regarding this issue.

I have done some minor trimming, but they still rub from about 20° to 23° as measured on the offroad screen on the dash. They do not rub at full lock though- at least not on level ground. To trim out all that would be required to not rub at all, I would need to cut into the fender flares which I do not want to do.

Did you had to do any Mods besides the collar in order to fit 37" tires? Any trimming done? Any rubbing?