AT4: Stock Height, Stock 18s, max tire size?

[Tjeli]

I have searched and read.  I have a pretty specific question.  What tire size will fit with NO rubbing and NO modification on a stock height AT4 on the stock 18s?  I am looking at Toyo MTs.

 

285/70?

285/75?

295/70?

 

Or just stick with 275/70?

 

Also, pics of stock height AT4s on OEM 18s with plus sized tires would be great.

 

-Eli

[topgear1224]

https://www.gm-trucks.com/forums/topic/240553-biggest-tire-upgrade-on-stock-rims-20%E2%80%99-sierra/

https://wheelsasap.com/gmc-at4-oversized-tire-trimming-guide/

"all on non-AT4 Sierras with a 2 inch front level (which is an AT4), you can fit that 295/60R20 without trimming as long as it's 33.94" v 11.77" or smaller."

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[ShortMag]

My stock AT4 with 18s has 285/70 Ridge Grapplers. You may be able to go a hair bigger but not much and you’ll pay a big price in tire weight

[pewterliftedz]

7 hours ago, ShortMag said:

My stock AT4 with 18s has 285/70 Ridge Grapplers. You may be able to go a hair bigger but not much and you’ll pay a big price in tire weight

 Do you have any pictures of that?  That’s the same tire size I’m looking to get when I drop down to 18s

Edited October 28, 2020 by pewterliftedz

[ShortMag]

3rd post down in this thread. Not my truck, but looks just like it. I got them based on this picture and have not regretted it

 

https://www.gm-trucks.com/forums/topic/223068-biggest-tires-on-at4-18-wheels-with-no-modification-or-wheel-change/#comments

[ShortMag]

295/70R18 Recon Grapplers fit on my 2019 stock AT4. Zero rubbing. I went with the non LT version of the tire which weights 7lbs/tires less than the 285/70R18 Ridge Grapplers that I got almost 72k miles out of