Biggest tire upgrade on stock rims? 20’ sierra

[Tod Pierce]

Hi guys, I have a 2017 GMC Sierra Elevation with stock Wrangler SR-A size 275/55r20 (measuring 31.0" x 10.09" based on spec).

I am in the market for new tires.  Considering Falken Wildpeak AT3W size 285/60r20 (measuring 33.5" x 11.2" based on spec) also considering Toyo Open Country AT3 (measuring 33.5" x 11.5" based on spec)

I am wondering if these will fit without level, lift or trim.  Lots of great info on these forums but seems like everyone at least levels to fit a larger tire without any rubbing.  Appreciate any feedback.

[Justin Holland]

I run the 275/65R20 trailrunners on my 2020 2WD SLE. I have a 2 inch leveling kit also. 

 

No trimming or rubbing at all. 

[smid87]

Bigger (Taller) Tires are about Ground Clearance or (Wider) more traction. In the snow you want a tall skinny tire to get through the snow to the pavement as quickly as possible. For Mud you want a wider tire to ride on top as long as you can. 

 

A lift kit is to prevent "getting stuck up to the body" and to add taller tires to add more ground clearance, But who it take that gorgeous Black beauty in the Mud on purpose?... That's what a Tacoma is for. I am for the levelling kit (Just got my 2020 GMC 1500 Black Elevation with X31 and Duramax) so I can use my truck for it's intended purpose Towing and Hauling. If I want to go Mudding I'll buy a side by side or older rig.... I am also thinking about the 4" lift kit to put on a little bigger tire as I do hunt and sometimes go off road, but not mudding. 

 

That being said I could just buy a side by side as they will handle a Deer and me easily... No worries about trashing the black beauty... GMC got this one right... Love the 24+ MPG and I emphasize the Plus.... 

[alvarezz09]

On 8/11/2020 at 8:15 PM, BlackElevation said:

295/60/20 Ridge Grappler with a 2inch level no rub. I removed the metal bracket from behind the front fender which many have done on here. Removing the metal bracket allows you to pull the fender back about a inch. Super easy and only took me about 30 minutes. Zero cutting 

do you have a side view picture i am trying to see the leveling how it looks Thank you!

[dfanzz01]

Would a 305/45/22 tire fit on a 21 stock suspension elevation without any trimmimg? Id like to avoid any cutting. 

[X31D10T2Dozer]

On 7/1/2020 at 6:44 AM, jbr1888 said:

He said he had a 2 inch level. Also, even at the stock ride height, the wheel well width, front to back, is the real limiting factor. Even stock, I think there's about 5 inches from the top of the tire to the fender. 

 

On 7/1/2020 at 6:03 AM, topgear1224 said:

He mentioned stock. I don't see you fitting anything larger than the OEM 275/60R20 without a lift or trimming.

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[X31D10T2Dozer]

got my 2020 gmc elevation x31 , ordered a 6inch rough country lift, i wanted to run my factory wheels but i want it to go on a 35x12.50 Cooper SST Pro ‘ has anyone tried this rig ? Would it fit ? Im concern bout the UCA rubbing the tire 

[Hotnhere]

On 8/11/2020 at 5:15 PM, BlackElevation said:

295/60/20 Ridge Grappler with a 2inch level no rub. I removed the metal bracket from behind the front fender which many have done on here. Removing the metal bracket allows you to pull the fender back about a inch. Super easy and only took me about 30 minutes. Zero cutting 

nice! I was thinking about doing the 2 inch leveling on a 2015 gmc Denali, don’t like how it sits at angle with front end lower than rear.  Do you guys think this would improve? stance with stock wheels and tires.

[Jojos]

On 6/30/2020 at 3:47 PM, jbr1888 said:

I have spent soooooo much time researching this exact issue over the last month. Go look at @2019sierra on Instagram. You'll see leveled trucks running all kinds of tires. It'll give you some ideas. 

 

All of this assumes you're running OEM wheels with a 28mm offset, like your Elevation wheels. 

 

The biggest thing you have keep in mind though is the P metric tire sizes mean absolutely nothing to tire companies. So, you have to look at the specific physical measurement of each tire. For example, 295/60R20 equates to 33.9" x 11.66," BUT a Nitto Trail Grappler 295/60R20 is 34.45" x 12.13" while a Nitto Ridge Grappler in 295/60R20 is 33.94" v 11.77." That specific tire definitely fits without trimming, based on my research. The Trail Grappler requires light trimming to plastic behind the front valence and requires cutting about half of the front mud flap off and removing the steel mud flap bracket. Here is the holy grail guide for this procedure: https://wheelsasap.com/gmc-at4-oversized-tire-trimming-guide/

 

Based on my research and actually reaching out to some guys online that are running 35x12.50, 35x11.50, and the 34.45" x 12.13" Trail Grappler, all on non-AT4 Sierras with a 2 inch front level, you can fit that 295/60R20 without trimming as long as it's 33.94" v 11.77" or smaller. With that said, I believe narrower tires such 285 or 11.5 are much less likely to rub. With the 295 and wider, some folks have said you'll need a 1/4 inch spacer for the front wheels to clear the upper control arm. I've ordered a set just in case. I'm trying to decide between the 285/65R20 and 35x11.5 Ridge Grapplers for my 2 inch leveled 2019 SLT X31.

 

Finally, as if each different tire model of a same P metric size (295/60R20, for example) wasn't a different size in real life, the physical sizes listed by the manufacturer or tire store websites is for the unloaded tire. This means that once the tire is mounted on your truck and is supporting your truck's weight, the tire's dimensions will be different, usually smaller in height and wider in width from sidewall to sidewall. For example, my factory Bridgestone Revo 3's are 275/60R20, they should be 33" x 10.8". On my truck and filled with 38lbs of air, they measure 32" x 12.75." So, they're nearly 2 inches wider than their spec. 

 

Hope this helps. 

Thanks for the good info! I'm looking for tires on my 21 elevation 4x4 on stock rims. Just wondering what you decided on for tires? I'm thinking of either a 285/65/20 or 295/60/20 in a Toyota open country AT3.

[Josh021]

On 6/30/2020 at 6:45 PM, topgear1224 said:

Here is my stock X31 elevation no spacers etc look how close it is to the wheel front at full lock. 41° according to the display.

I don't know that I would buy 4 new tires for 1/4 inch of lift. But to each their own.

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I'm running 275/65r20 on my 2020 sierra elevation with factory level with 2 inch readylift sst. Waiting on my 35s