I have a 2015 Sierra 1500 All Terrain with 2" level (stock 1.5" rear blocks). I put 295/60r20 on stock wheels. They had a very slight rub on front inner wheel liner at full lock, but it was fixed easily by a zip tie. I originally put 275/60 on there cuz the tire shop didn't thing the 295/60 would fit. They were wrong! The 295/60 looks 100% better. I have Toyo Open Country AT 2. The 295/60 is the Xtreme version so it is noisier/heavier than the 275/60 due to the wider Xtreme tread pattern...but it looks way better! I also added a 1/4" RCountry spacer to the wheels to get a little more width for astetics.