Biggest tires on AT4 18" wheels with NO modification or wheel change

kenac · November 24, 2020

27 minutes ago, 2020AT4 said:

I like it! Same color as mine too, only difference is I got the 6-1/2' box. I don't want to put the 1" leveler on mine...my brother did that with his old All Terrain & I thought it made it tougher to see the nose of the truck. I have a hard enough time seeing the front end the way it is with the shorter hood style (I had to put a 1-3/4" lift kit under the seats so I could see front end better). I don't really do much off-road driving (not counting gravel roads), the little I do isn't like extreme rock climbing or anything (construction sites and farm land). But we do get a pretty good amount of snow here though, so I don't know if that makes a difference or not with snow build up. How were you able to figure out which ones you could use without having them rub?

I barely notice the 1" level from the drivers seat. I think I notice the height of the tires far more. I did a 2.5" on my '17 SLT I had and certainly did notice the front end height difference on that.

Then again, I'm tall. My head hits the ceiling if I raise the seat too far so its different for everyone.

If you're in the snow def don't get these tires. We don't get any where I live but the reviews on them for snow are bad. But I think most M/T style tires are that way. Fwiw the original tire I wanted was Cooper AT3 XLT's - not nearly so aggressive as these but I do love this look.

For sizing I did a lot, and I mean a LOT of reading and looking at pics of other trucks. Realized height wasn't the issue so much as width with stock wheels. I would have gone with 35x11.50 if there was more styles available in them but most are 12.50's which will rub. Wheel spacers were an absolute "no" on my list of mods and I dont like really wide tires or a bunch of poke anyway so these are perfect for my taste.

I'm really particular on the look of tires so I would find one I liked and see if it was available in a 285/65R20 and then swapped to 295/60R20 when I kept running into backorder issues. I wasn't concerned with the price but more popular sizes cost less as well, but I'm not sure where those 2 fall on that list.

I highly recommend tiresize.com to get the exact size of the tire you have in mind, they can vary pretty wildly on actual size even though they're listed the same.

2020AT4 · November 24, 2020

16 minutes ago, kenac said:

I barely notice the 1" level from the drivers seat. I think I notice the height of the tires far more. I did a 2.5" on my '17 SLT I had and certainly did notice the front end height difference on that.

Then again, I'm tall. My head hits the ceiling if I raise the seat too far so its different for everyone.

If you're in the snow def don't get these tires. We don't get any where I live but the reviews on them for snow are bad. But I think most M/T style tires are that way. Fwiw the original tire I wanted was Cooper AT3 XLT's - not nearly so aggressive as these but I do love this look.

For sizing I did a lot, and I mean a LOT of reading and looking at pics of other trucks. Realized height wasn't the issue so much as width with stock wheels. I would have gone with 35x11.50 if there was more styles available in them but most are 12.50's which will rub. Wheel spacers were an absolute "no" on my list of mods and I dont like really wide tires or a bunch of poke anyway so these are perfect for my taste.

I'm really particular on the look of tires so I would find one I liked and see if it was available in a 285/65R20 and then swapped to 295/60R20 when I kept running into backorder issues. I wasn't concerned with the price but more popular sizes cost less as well, but I'm not sure where those 2 fall on that list.

I highly recommend tiresize.com to get the exact size of the tire you have in mind, they can vary pretty wildly on actual size even though they're listed the same.

The whole truck being higher wouldn't bother me, just having the front end up higher is what would bug me; I'm only 5'8".

Yeah, height doesn't look like isn't much of an issue, but there's definitely not much room front to back, and don't really wanna rip my mud flaps off haha. I'm not a fan of wheel spacers or wide tires either. I don't like the look of them.

Thanks for the tip on tiresize.com and as I was google image searching I came across this haha

Jgoins1014 · December 19, 2020

I have a 2021 Sierra 1500 AT4 Duramax I have the stock 265/65/18 I am about to order 285/65/18 is this going to be big enough to fill the gap? I am going to get Bridgestone Dueller Revo at3

Luke Olzawski · January 27, 2021

I put 285/75 18’s on my truck like you guys said and they rub not bad tho so I guess I’ll just deal with it. Look great tho!

Banksy2020 · January 28, 2021

On 4/27/2019 at 8:22 PM, Northeast4050 said:

285 75 18...35" nitto ridge grapplers fit the stock setup. Zero trimming zero rubbing

How is this setup holding up? Noticed any increased rubbing? Also, are the 2: blocks still on the back of your truck?

LoneWolfQuade14 · February 15, 2021

On 5/23/2019 at 12:07 AM, joshuapchase said:

Thanks for the information... I found a set and swapped them out! Look great and after selling my takeoffs only cost $200... winning!

What tires are on there? They do look great! Where'd you do the buying and selling?

BrentM79 · February 27, 2021

On 5/9/2019 at 6:45 PM, Aldiaz1551 said:

Put some 295/70r18. No rubbing no trimming and looks good.

Did you do any type of leveling kit on this? You pretty happy with the ride and much road noise?

rmac4 · May 18, 2021

Following -- I just added 6112s on the highest setting and gained 1" up front. I realize its a bit outside the original intent of the thread, but this is a great starting point for looking at tire sizes that will fit.

z28tranz · June 9, 2021

New to forum, but wanted to see if anyone has used these bumper spacers to help with clearance of bigger tires up front?

https://www.wickedtrucks.com/2019-2020-gmc-1500-sierra-3-4"--bumper-spacer-kit-/p2236

gabe21 · June 11, 2021

i have 275 70 18 on mine nitto grappler on mine no rub

tommyxc · June 11, 2021

i have falken 275/70/18 . rub alittle .icon wheel 0 offset

Cudamike440 · June 16, 2021

I just put on the Nitto ridge grappler 285 75 18 on my 2020 at4. Very slight rubbing that I believe will go away after a few weeks of driving.Pic with tires

derichio02 · July 2, 2021

On 6/11/2021 at 11:37 AM, tommyxc said:

i have falken 275/70/18 . rub alittle .icon wheel 0 offset

Is this a 18x9 +0? I'm looking at purchasing one of the following Method setups:

18x9 +0 with 285/70/18 (Good choice if I ever want to lift in the future)

or 18x9 +18 with 285/70/18 (Good choice for close to stock fitment)

I really dont want any rubbing or trimming since I travel quite a bit. How bad and where is the rub?

Edited July 2, 2021 by derichio02

tommyxc · July 3, 2021

yes the front passenger tire rubs when i turn into my driveway,i did some trimming but it still rubs. 18x9 0 offset.ican live with it

tommyxc · July 3, 2021

5 hours ago, derichio02 said:

Is this a 18x9 +0? I'm looking at purchasing one of the following Method setups:

18x9 +0 with 285/70/18 (Good choice if I ever want to lift in the future)

or 18x9 +18 with 285/70/18 (Good choice for close to stock fitment)

I really dont want any rubbing or trimming since I travel quite a bit. How bad and where is the rub?