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Biggest tires on stock RST? What if leveled?

JimTX
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JimTX Enthusiast

JimTX

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Hey folks,

 

Just wondering what the biggest tire is I can fit on the factory 20s without rubbing or any issues.

 

I plan on changing the shocks to 5100s when they become available and will raise the front a little also. Will that help with clearance much? I just want more sidewall for a better ride and a tougher tire.

 

Currently have the 275/60R20 tire size. Thanks.

 

 

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Bluerado23
Bluerado23

285/65/20 with only 2 inch level from ready lift About a 34.5 inch tall tire and 11.5 inches wide Very light rub on plastic mud flap when reverse at full lock, not enough for me to trim.

Jay Teez
Jay Teez

2019 RST Z71 2 inch Southern Truck Level  Stock 20 inch Wheels 285 60 20 Nitto Ridge Grapplers No Rub!!! ?

madconcept
madconcept

What I’m reading is with a 2” level the widest you can go without rubbing would be a 285 but with a 60 aspect ratio.  This is for 20” wheels of course. If you want to go to a 65 ratio you need to

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Bluerado23 Enthusiast

Bluerado23

Posted
Posted

741994584f0f80189e049a10a2e45923.jpg
285/65/20 with only 2 inch level from ready lift

About a 34.5 inch tall tire and 11.5 inches wide
Very light rub on plastic mud flap when reverse at full lock, not enough for me to trim.

  • Like 4
Snuff Enthusiast

Snuff

Posted
Posted

I put KO2’s 275r60 20’s on mine the first day. I know that is the stock size but look more aggressive and in my opinion the 33” tire looks good. 

 

I looked at the 275r65 which is 1” taller and .54 more sidewall but Discount Tire steered me away from them.

 

Mine have a D rating which is plenty for a 1/2 ton truck.

JimTX Enthusiast

JimTX

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I put KO2’s 275r60 20’s on mine the first day. I know that is the stock size but look more aggressive and in my opinion the 33” tire looks good. 
 
I looked at the 275r65 which is 1” taller and .54 more sidewall but Discount Tire steered me away from them.
 
Mine have a D rating which is plenty for a 1/2 ton truck.


Mind if I ask why they steered you away from them?


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JimTX Enthusiast

JimTX

Posted
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741994584f0f80189e049a10a2e45923.jpg
285/65/20 with only 2 inch level from ready lift

About a 34.5 inch tall tire and 11.5 inches wide
Very light rub on plastic mud flap when reverse at full lock, not enough for me to trim.


Good looking truck...are those KO2s? 285/65 is what I was after so that’s good news. Torn between the KO2 and Nitto Terra grapplers G2.


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Snuff Enthusiast

Snuff

Posted
Posted

They were afraid they would rub and would not offer their 30 return policy. I like the bigger tire but at 67 years old every 1” gets tougher!

Bluerado23 Enthusiast

Bluerado23

Posted
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Good looking truck...are those KO2s? 285/65 is what I was after so that’s good news. Torn between the KO2 and Nitto Terra grapplers G2.


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its changed from then now lol

Yes KO2, I would do KO2
That particular nitro isn’t the best in wet conditions. I’ve had them all
My go to tires are KO2 or Toyo RT
MattGMC2014 Enthusiast

MattGMC2014

Posted
Posted
On 8/14/2019 at 11:30 AM, JimTX said:

 

Hey folks,

 

Just wondering what the biggest tire is I can fit on the factory 20s without rubbing or any issues.

 

I plan on changing the shocks to 5100s when they become available and will raise the front a little also. Will that help with clearance much? I just want more sidewall for a better ride and a tougher tire.

 

Currently have the 275/60R20 tire size. Thanks.

 

 

Sent from my iPhone using Tapatalk

 

So do your 275/60r20s rub currently without any modifications?  That is the size I am trying to put on mine.  I do not want to lift or level currently.  I am under the impression that is the biggest size I could go without rub.

MattGMC2014 Enthusiast

MattGMC2014

Posted
Posted
1 hour ago, Bluerado23 said:

These come stock with 275/60/20 ....
So there is no rubbing with the tires that these trucks come with from the factory

Gotcha.  Wasn't sure if that would be the same for a 2014 Sierra 1500 4x2.  Had 275/55r20 when I bought it.

  • 1 month later...
RST-001 Enthusiast

RST-001

Posted
Posted

Enthusiast,

 

Truck looks nice with the KO2's.  I just bought a RST and will be installing the 2 inch level kit from ReadyLift this weekend.  Tires are next but like many others was not sure exactly which ones I want to purchase.  Is there any way you can post a few more photos of your truck that has the 285/65r20 KO2's, including a side view?  I was thinking about purchasing the 285/60r20 tires but from the one photo you posted I might go with the 285/65r20's.

 

Thanks in advance?

Don

  • 4 months later...
Jay Teez Enthusiast

Jay Teez

Posted
Posted

That truck looks good with that tire set up ??. 285 65 20. I got a 19RST with a 2 inch southern truck level kit and went to discount today. They are getting some 285 60 20(33.46 inch tires) Nitto Ridge Grapplers in on Monday which I am going to test fit to see if I like it. I’m not wanting any rubbing. I’ll post pics if I end up getting them. 

  • Like 1
econometrics Senior Enthusiast

econometrics

Posted
Posted
1 hour ago, Jay Teez said:

That truck looks good with that tire set up ??. 285 65 20. I got a 19RST with a 2 inch southern truck level kit and went to discount today. They are getting some 285 60 20(33.46 inch tires) Nitto Ridge Grapplers in on Monday which I am going to test fit to see if I like it. I’m not wanting any rubbing. I’ll post pics if I end up getting them. 

You should be fine. 

  • Like 1
Jay Teez Enthusiast

Jay Teez

Posted
Posted

2019 RST Z71 2 inch Southern Truck Level 

Stock 20 inch Wheels

285 60 20 Nitto Ridge Grapplers

No Rub!!! ?

4A58DBED-376F-488C-A42A-7086CA0EB21D.jpeg

  • Like 3

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