Biggest tires on stock wheels

[JohnMiner]

Hi everyone. I have a 2020 GMC Sierra AT4 with the 6.2. I am looking to put new tires on the stock 18" wheels and would like to know how big I can go without having to do any modifications. Any help would be really apreciated.
Thanks

 

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[LamboTexas]

I know this is for a 2021- but this is my research. You might check 4wheeldriveguide.com for more answers. I plan on going to Discount Tire and trying different sizes when I purchase

 

[LamboTexas]

Looking to Run 34" or 35" Tires on GMC AT4?

To run 34" or 35" Tires in a GMC AT4 you will require some minor trimming. In this guide we'll show you what's needed and what to look for in wheel offsets.

wheelsasap.com

 

[HTX6.2CarbonPro]

I want to say I tried to fit 305/60/R20s and my front driver tire hit the frame at full left turn so I went for 275/60/R20s.

 

[speedysierra]

I put some 275/65r20 Firestone Destination XT ok my stock 20s

 

[psw757]

I put some 275/65r20 Firestone Destination XT ok my stock 20sView attachment 1436View attachment 1437
View attachment 1438

Any rubbing at full lock?

 

[poopster]

I know this is for a 2021- but this is my research. You might check 4wheeldriveguide.com for more answers. I plan on going to Discount Tire and trying different sizes when I purchase View attachment 1419View attachment 1420

Great help!

 

[FISHYSMALLS]

I put some 275/65r20 Firestone Destination XT ok my stock 20s

Are you stock suspension? How close are the tires to the UCAs?
thank you

 

[poopster]

I know this is for a 2021- but this is my research. You might check 4wheeldriveguide.com for more answers. I plan on going to Discount Tire and trying different sizes when I purchase View attachment 1419View attachment 1420

I have been searching this forum for tire and wheel sizes and I'm really confused. I'm going to rely on the information above.

I have a 2022 AT4 with factory lift and Goodyear Territory 265/60R20. I'm going to have the stock wheels powder coated and then install larger tires. I thought about new 18" or 17" wheels because the tires show more sidewall then the 20" and I really like that look but money is tight. After the powder coating, I'm going to install Toyo Open Country AT III, 285/65R20, (34.6" tall and 11.5" wide). If I have to remove the mud flaps will do. Am I missing something?

Never mind. I ended up buying wheels and tires from Custom Offsets.

 

[poopster]

Has anyone installed Bilstein 5100 adjustable shocks on a 2022 AT4 w/ factory level? Just looking to get a bit more height in the front.

 

[Roket10r]

Hi everyone. I have a 2020 GMC Sierra AT4 with the 6.2. I am looking to put new tires on the stock 18" wheels and would like to know how big I can go without having to do any modifications. Any help would be really apreciated.
Thanks

I've been running the Nitto Ridgegrapplers in 295/70r18 for 3+ years without any issues.....no rubbing, no cutting or level kit. Same truck with the 6.2L .

 

[Skid51]

Is it true that its easier to fit 35’s on the Trail Boss than the AT4 because the wheel well shape is different and in fact a slightly wide opening at the bottom?

 

[FISHYSMALLS]

There are no issues putting 35’s on the AT4. It’s all about wheel choice and offset. I am running 20x9 +19 with 285/65’s on stock suspension without rub.

 

[Roket10r]

Is it true that its easier to fit 35’s on the Trail Boss than the AT4 because the wheel well shape is different and in fact a slightly wide opening at the bottom?

Not an issue at all...this was taken today loaded with concrete and blocks, parked on a slight incline. Nitto Ridgegrapplers 295/70r18 with No Rub or trimmed fender well .

 

[speedysierra]

I never had any rub before but just in case anyone would ever wonder this, I tried to put 1.5” spacer on like on the donslife YouTube channel thinking they would work. And they rub with my tires on stock rims. I’m trying 1.25” next week.