Biggest tires on AT4 20" stock wheels with NO modification

[todd308]

Anyone do 275/65/20 Toyo AT3's stock and did they rub?  Trying to decide between the 275/65 and 275/60's, but unfortunately Toyo doesn't make an LT version in 275/60.  I've seen a couple pics stock with the 275/65's but they looked really tight up front.   No looking to go wider, just taller. 

 

Edited March 5, 2021 by todd308

[JB-2500HD]

Just ordered BFGoodrich All Terrain T/A KO2s for my 2020 Sierra 2500HD. Size is 285/65R20 (only 1/2" larger than the stock 275/65R20). I'll let you know how they look/fit, but shouldn't be an issue at all with rubbing and what not.

 

[destrada127]

What bumper is that?

Sorry for super late response. Addictive dessert design stealth series

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[droneofarc]

I have a new 2021 GMC Sierra 1500 AT4, 4WD, Crew Cab Short Box. It has the factory 2" lift.   I have the stock 18" tires and rims that come with the truck. 

I am looking to go 20" rim but need to figure out what is the biggest tire in a 20" that I can put on without rubbing or doing any trimming.   I am just looking for the aesthetic of biggest tire and that it comes out of the wheel well just a little.

 

I have been researching it and seen so many different sizes such as

LT285/60R20 

305/55R20

LT275/60R20

 

The rims I am looking at putting on are

Fuel Zephyr.    20x9 +18mm offset

XD842 Snare. 20x9 + 20mm offset

 

Any input is greatly appreciated.   Picture of the truck I just got.

[MKC93]

On 5/14/2019 at 6:04 PM, destrada127 said:

I had accelera m/t 01 35/12.50 on stock 20s and just mounted 37s today so if you're interested in them I'll sell them to you. And you can see that I fit them with no problem. I did do a 1.5" motofab leveling kit to fix the rake (which is also for sale) but it was not added until a month later

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Hi sir I know this post is old by now... Do you think I could fit 22" wheels with the same size tires? I have a level kit I plan to install as well.

[gabe21]

hi has anyone tried 33/12.5/20 with no leveling kit on their at4 i have the dark metallic sky at4. 

 

[Squam1]

I have the same question - 33x12.5r20s and no rubbing (have the same color truck... great choice!) 

 

Edited June 12, 2021 by Squam1

[derichio02]

My truck came with 18x9 275/65/20 Duratracs. I want to swap to 20’s so I just ordered Method 20x9 +18 with 285/60/20 with high hopes not to rub on stock suspension. The offset should push the wheel out by 10mm or so, so I’m not worried about the UCA but rubbing is a concern. 
 

Not trying to derail an old thread but has anyone tried this setup?

 

I chose +18 for the 5.7” backspacing as I plan to get a bds lift eventually. 

[derichio02]

On 4/7/2021 at 6:33 AM, droneofarc said:

I have a new 2021 GMC Sierra 1500 AT4, 4WD, Crew Cab Short Box. It has the factory 2" lift.   I have the stock 18" tires and rims that come with the truck. 

I am looking to go 20" rim but need to figure out what is the biggest tire in a 20" that I can put on without rubbing or doing any trimming.   I am just looking for the aesthetic of biggest tire and that it comes out of the wheel well just a little.

 

I have been researching it and seen so many different sizes such as

LT285/60R20 

305/55R20

LT275/60R20

 

The rims I am looking at putting on are

Fuel Zephyr.    20x9 +18mm offset

XD842 Snare. 20x9 + 20mm offset

 

Any input is greatly appreciated.   Picture of the truck I just got.

Its been a while but what did you end up going with? Any rubbing or trimming? Asking because I’m in the same boat with ordering now 20x9 +18 and want to go with 285/60/20 ridge grapplers

[BowtieBill]

20 minutes ago, derichio02 said:

My truck came with 18x9 275/65/20 Duratracs. I want to swap to 20’s so I just ordered Method 20x9 +18 with 285/60/20 with high hopes not to rub on stock suspension. The offset should push the wheel out by 10mm or so, so I’m not worried about the UCA but rubbing is a concern. 
 

Not trying to derail an old thread but has anyone tried this setup?

 

I chose +18 for the 5.7” backspacing as I plan to get a bds lift eventually. 

Mine is a Silverado, not a Trail Boss, but with a 2" level front/1" block rear.  I just installed 20x9 +19mm Fuel Sledge with 285/60/20 Toyo A/T III's, no rub. They stick out a little past flush, about 5/8". 

Hope this helps.

Good luck

[derichio02]

4 hours ago, BowtieBill said:

Mine is a Silverado, not a Trail Boss, but with a 2" level front/1" block rear.  I just installed 20x9 +19mm Fuel Sledge with 285/60/20 Toyo A/T III's, no rub. They stick out a little past flush, about 5/8". 

Hope this helps.

Good luck

How much clearance do you have? I’m not yet lifted or leveled. Hoping this setup works in the AT4

[derichio02]

14 hours ago, BowtieBill said:

Mine is a Silverado, not a Trail Boss, but with a 2" level front/1" block rear.  I just installed 20x9 +19mm Fuel Sledge with 285/60/20 Toyo A/T III's, no rub. They stick out a little past flush, about 5/8". 

Hope this helps.

Good luck

 

Also was this the Readylift SST Kit?

[BowtieBill]

3 hours ago, derichio02 said:

 

Also was this the Readylift SST Kit?

No. I used Bilstein 6112's in front, 1" Block in rear with Bilstein 5160's.

When I get a chance I will see if I can get a measurement for you. It is close, but not too bad. I really debated to go with the 285/60's, or try the 305/55's. I did not want to do any trimming if necessary, but I would consider removing the bracket behind the mud flaps. But turns out I do not have to do either.

[derichio02]

2 hours ago, BowtieBill said:

No. I used Bilstein 6112's in front, 1" Block in rear with Bilstein 5160's.

When I get a chance I will see if I can get a measurement for you. It is close, but not too bad. I really debated to go with the 285/60's, or try the 305/55's. I did not want to do any trimming if necessary, but I would consider removing the bracket behind the mud flaps. But turns out I do not have to do either.

Thanks for the details. Was the level necessary for the tires to not rub or do you think it would fit stock suspension?

[BowtieBill]

38 minutes ago, derichio02 said:

Thanks for the details. Was the level necessary for the tires to not rub or do you think it would fit stock suspension?

I didn't do the Level just to fit the tires, I did the level because I like the look. I would of done the Level if I was sticking with the stock size tires. Plus, the Bilsteins feel so much better, night and day difference over the factory Z71 Rancho shocks.

As it sits now, I think the front height is close to what a stock Trail Boss/AT4 would be. I am not sure if my set-up would of fit if I left it stock height. 

 

Edited July 4, 2021 by BowtieBill
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