2020 Ram 1500 Using Stock 20" Rims, what is the biggest tire I can go?

[nightrunner76]

Hello, first time posting. If this has been asked please post the link, learning to navigate this forum and may have passed it.

The stock tires that came with the truck look a bit small (275/55 R20). Looking to upgrade to the Nitto Terra grappler G2's for a more aggressive look with hybrid capabilities. Had the original Terra grapplers on my 3rd Gen and loved them.

I really like the stock 20" matte rims so would prefer to keep them. What would be the biggest size I could go without adding a leveling or lift to the truck? Any advice would be greatly appreciated. Thank you!

 

[jl13]

I would say 33's if no off road group
34's if you have the off road group

 

[joshsouth12]

33s and maaaaayyyyybe 34s but I highly doubt it. Was looking at this myself recently and think 275/60r20 was biggest without rubbing UCA, but ended up doing level and 285/65r20 instead

 

[Birdman_2000]

From reading a ton of post in this forum I am going to say the 275/60/R20's. I have the ORP and plan to go for 275/65/R20's. You might be able to do 65's if you zip tie back the inner fenders on the front. Least that is what i have gleaned from reading on here.

 

[Keh]

I have a 2019 Ram 1500 Limited with the ORP. My issue is that with the limited edition i have different clearance heights- Off road/Normal/Aero/Entry Exit.
I am wanting 275/65/r20s but have a feeling they will rub at full turn in Aero mode and probably more in Entry Exit mode. Can anyone with the same truck confirm?

 

[TankSinatra]

 

[Mathyou91]

I just installed 35in/12.5in Ridge Grapplers on my 2022 Ram Lonestars 20in wheels. No modifications have been made whatsoever. Very slight rub when at full turn. Have yet to rub them while driving around yet. They fit fine now but I will be installing a 3.5in lift next week

 

[RonF]

@Mathyou91,​

Love the look of your truck and the 35's on your truck. And really want to do this to my truck when it arrives.

Possible to do me a favor and measure the distance between the upper A-arm and the tire ? Or take a picture ?
Interested in the distance before you do your lift.

 

[theblet]

Without leveling 275/60r20

You could go 33x12.5r20 with a 2 inch level

I went with the first option.

 

[Mathyou91]

Its a tight fit. But it fits

 

[theblet]

Its a tight fit. But it fits
View attachment 130139 View attachment 130141

What width are your 35’s?

 

[Mathyou91]

What width are your 35’s?

12.5"

 

[Mathyou91]

 

[theblet]

12.5"

I’d prob run wheel spacers with 12.5” to be safe

 

[Mathyou91]

I’d prob run wheel spacers with 12.5” to be safe

I'm going to try and get spacers installed with my lift this week. Probably a smart move.

 

[joshsouth12]

I'm going to try and get spacers installed with my lift this week. Probably a smart move.

For sure - one decent pothole or hard turn at highway speeds and that sidewall is going to get a bit too friendly with that UCA

Also - depending on lift you install, my level replaced UCAs and I actually have a bit more room between now, so you may not need spacers afterward.

 

[theblet]

For sure - one decent pothole or hard turn at highway speeds and that sidewall is going to get a bit too friendly with that UCA

Also - depending on lift you install, my level replaced UCAs and I actually have a bit more room between now, so you may not need spacers afterward.

Good point. Either way, it’s not worth the chance of a blowout imo

 

[nightrunner76]

I just installed 35in/12.5in Ridge Grapplers on my 2022 Ram Lonestars 20in wheels. No modifications have been made whatsoever. Very slight rub when at full turn. Have yet to rub them while driving around yet. They fit fine now but I will be installing a 3.5in lift next week View attachment 130077 View attachment 130078

This looks fantastic! I would do similar but try to stick with leveling struts in the front and maybe a hair smaller tires. Same rims as mine too!!

 

[nightrunner76]

All really great info. For those who are unsure, hit the shop yesterday and was told the following in terms of leveling:

Each RAM truck from the factory can have a slightly different rake depending on many factors such as options or even the way it was built. That's why they have to measure each truck to select a specific leveling kit. Currently my truck has a 2.5" rake difference between the front and back (Front is 2.5" lower.) If I did a common 2" leveling kit, I would still be off a hair (.5"). If I go up to 2.5", the front could sit a bit higher with a full tank of gas, loaded bed or guests in the vehicle. They recommended the 2" kit with upper CA's for about $700. they said they would like to measure the turn radius and wheel well to suggest a good size before ordering tires for the stock rims. I know guys that do this professionally or only work on trucks could probably rattle it off from experience but I respect their process.

Plan on holding on this for a bit as I am doing intake, exhaust and a cover. Will report back when I am ready with more info to share!

 

[AKRam21]

For whatever it is worth, it looks like Walmart.com has the same tire at a reduced price of $279 each. May not last long.....here's the link:

Robot or human?

Also, maybe someone can help me understand, but it appears that Pirelli makes 2 different versions of this tire size. One is the "eco focus" that seems to reference Rivian. That version of the tire is considerably more expensive than the LT version. Image below is from the tirerack.com website.