Leveled AT4 with zone 1.75" whats the max tire size?

Chevysousa · August 22, 2020

hey guys, i got a 2019 gmc sierra AT4 with stock 275/60R20, the zone website says max 295/60R20 On stock wheels, others say i can run a 33/12.50R20. will that rub on a stock rim? im looking at some firestone MT'S. thanks! id rather do the 33/12.50R20 setup.

cltsig · August 22, 2020

43 minutes ago, Chevysousa said:

“AT4 with stock 275/60R20, the zone website says max 295/60R20 On stock wheels, “

So stock wheels no level you can run 295/60/20s?

rikhek · August 25, 2020

I just put Toyo Open Country AT3 285/75/18 (i.e., 34.8" x 11.3") on my 2019 AT4 with OEM 18" wheels and the Rough Country 2" leveling kit and they just barely fit with no rubbing on anything lock-to-lock. Offroading with articulation and I think I'll be rubbing the front of the front liner a tad but not bad enough to need trimming or wearing a hole through them.

What I really like is how they decreased the angle of the UCA to what looks like a MUCH more acceptable angle. I realize you're asking about a 1.75" leveling kit but mine is close to what you're asking.

I went with the Toyo 35" AT3's as they're only 11.3" wide. I think a 12.5" tire would have had issues with the UCA ball joint. I would have been close but the Toyo's offer plenty of ball joint clearance.

Matthew Parker · October 3, 2020

On 8/25/2020 at 3:20 PM, rikhek said:

I just put Toyo Open Country AT3 285/75/18 (i.e., 34.8" x 11.3") on my 2019 AT4 with OEM 18" wheels and the Rough Country 2" leveling kit and they just barely fit with no rubbing on anything lock-to-lock. Offroading with articulation and I think I'll be rubbing the front of the front liner a tad but not bad enough to need trimming or wearing a hole through them.

What I really like is how they decreased the angle of the UCA to what looks like a MUCH more acceptable angle. I realize you're asking about a 1.75" leveling kit but mine is close to what you're asking.

I went with the Toyo 35" AT3's as they're only 11.3" wide. I think a 12.5" tire would have had issues with the UCA ball joint. I would have been close but the Toyo's offer plenty of ball joint clearance.

Pics?