I recently got a 2015 Sierra SLT Z71 and am looking to upgrade my tires. I've seen posts of people running 275/65R20 (34.1x10.8) on just a 2-2.5" leveling kit (supposedly with no rub). The tires I would like to run are 295/60R20 (33.9x11.6), but I've read that I would need to have a 4" lift to fit these with no rub. Even though the 275/65R20 are a tad taller, is it the width factor that comes into play with fitting the 295/60R20 on a 2.5" level. Any insight or experience with these sizes and combinations would be appreciated.