Owners Pictures of 35" Tires on Stock AT4 or Trail Boss

TXguy · July 25, 2020

9 hours ago, WheelsASAP.com said:

Just noticed I mention 22 meant to have said 20, my bad. Same advise applies though as the width and the offset are the contributing factor. I'd stick to a -12 thru -18 offset on a 10 width and that's also where you would find most wheel brands target. Check out the below link of a truck I just posted, it's running 20x10 -18 on 35s, It looks Amazing!

Thanks for the information. That looks great!

geoff1966 · July 25, 2020

thanx!

I've since changed the tires to bfg mt3s same size,35x50.12r20s.

TXguy · July 25, 2020

10 hours ago, geoff1966 said:

thanx!

I've since changed the tires to bfg mt3s same size,35x50.12r20s.

How do you like MT3s vs the ridge grappers?

geoff1966 · July 25, 2020

the bfg km3s are a m/t

tire that is also very comfortable on the highway.The grapplers not so much.They get to hot when on the highway and psi jumps.

Awesome in the Bush but not a pavement tire.

BetaX · July 27, 2020

On 7/23/2020 at 9:02 PM, Jp sierra said:

Just wondering what the CV’s look like with 4inchs of lift.

Just took this photo. AT4 w/ 2" SST. Angles aren't bad at all. No worse than my 2011 F150 with a 2.5" which i ran for 150k+ miles that way with no issues.

I believe i read that on the new GM's they have a narrower diff so longer Cv's and better angles.

I do have minor rubbing with the tires at the moment (AT4 w/ 2" SST, 285/75/18 Ridge Grapplers on Stock 18's).

Very minimal and only when the suspension is minimally articulated going over a bump with the tires turned.

Doubt i'll even mess with it.

The one thing i need to check again is the UCA's.

It looks like i may have a minor rub mark. I need to clean them off and then go play around at different steering angles and inclines and check to see if it grazes or not.

Edited July 27, 2020 by BetaX

Jp sierra · July 27, 2020

1 hour ago, BetaX said:

Just took this photo. AT4 w/ 2" SST. Angles aren't bad at all. No worse than my 2011 F150 with a 2.5" which i ran for 150k+ miles that way with no issues.

I believe i read that on the new GM's they have a narrower diff so longer Cv's and better angles.

I do have minor rubbing with the tires at the moment (AT4 w/ 2" SST, 285/75/18 Ridge Grapplers on Stock 18's).

Very minimal and only when the suspension is minimally articulated going over a bump with the tires turned.

Doubt i'll even mess with it.

The one thing i need to check again is the UCA's.

It looks like i may have a minor rub mark. I need to clean them off and then go play around at different steering angles and inclines and check to see if it grazes or not.

Thank you so much , I alway here how the angles can be compromised, but TB/AT4’s come with a actual factory lift not a level so they must have took that into consideration with different longer cv’s...those angles look fine I’ve had worse in the past . Thanks again . And I’m only going up 1.5

BetaX · July 28, 2020

18 hours ago, Jp sierra said:

Thank you so much , I alway here how the angles can be compromised, but TB/AT4’s come with a actual factory lift not a level so they must have took that into consideration with different longer cv’s...those angles look fine I’ve had worse in the past . Thanks again . And I’m only going up 1.5

The AT4/TB should have no better CV angles than a non AT4/TB.

The GM AT4/TB kit is a glorified leveling kit at the end of the day they're putting on these trucks so adding additional lift is fairly significant without doing a diff drop and correcting geometry.

I would plan on something with new uppers no matter what you choose.

The factory "lift" does not include new UCA's so i would assume these are shared across the platform.

Here is a 2.5" on a non AT4/TB truck that had a failure recently. It was a crack instead of a ball joint so could be unrelated, but too many UCA issues to not replace when adding any additional height IMO.

https://www.facebook.com/groups/AllNewSilveradoSierra/search/?query=upper control arm&epa=SEARCH_BOX

Edited July 28, 2020 by BetaX

Jp sierra · July 28, 2020

7 hours ago, BetaX said:

The AT4/TB should have no better CV angles than a non AT4/TB.

The GM AT4/TB kit is a glorified leveling kit at the end of the day they're putting on these trucks so adding additional lift is fairly significant without doing a diff drop and correcting geometry.

I would plan on something with new uppers no matter what you choose.

The factory "lift" does not include new UCA's so i would assume these are shared across the platform.

Here is a 2.5" on a non AT4/TB truck that had a failure recently. It was a crack instead of a ball joint so could be unrelated, but too many UCA issues to not replace when adding any additional height IMO.

https://www.facebook.com/groups/AllNewSilveradoSierra/search/?query=upper control arm&epa=SEARCH_BOX

2.5 is a bit too much... but I see what your saying

superhighsierra · July 28, 2020

9 hours ago, BetaX said:

The AT4/TB should have no better CV angles than a non AT4/TB.

The GM AT4/TB kit is a glorified leveling kit at the end of the day they're putting on these trucks so adding additional lift is fairly significant without doing a diff drop and correcting geometry.

I would plan on something with new uppers no matter what you choose.

The factory "lift" does not include new UCA's so i would assume these are shared across the platform.

Here is a 2.5" on a non AT4/TB truck that had a failure recently. It was a crack instead of a ball joint so could be unrelated, but too many UCA issues to not replace when adding any additional height IMO.

https://www.facebook.com/groups/AllNewSilveradoSierra/search/?query=upper control arm&epa=SEARCH_BOX

#Facts

That is why you are better off not buying an AT4 or a Trailboss. Period. It's a $hitty spacer lift at the end of the day with some garbage shocks/springs/struts.

The only way to lift these trucks right is to put on a true stage 3 aftermarket suspension kit with new UCA's, shocks, springs and struts or coilovers. If you have the cash you should also be replacing the LCA's as well. And these trucks shouldn't be lifted more than 2-3" before the geometry goes to $hit. And the 6" kits like BDS, Zone, etc. are inherently garbage as well as while they account for changes in the geometry, they create weak points all over the suspension hence why you can't off-road them seriously.

And a public service announcement for those who still don't get it: ROUGH COUNTRY is absolute dog $hit. Would you build a house on a half ass slab/foundation to save a couple bucks? No, because that would compromise the integrity of the rest of the home. It's crazy to me that people put these bull$h!t parts on their 40-70k trucks, just to save a couple hundred bucks...

OilfieldTrash78 · July 28, 2020

Alright, so, what is the biggest Ridge Grappler anyone has been able to run with no running or modifications on a completely stock 2020 AT4 with the OEM 20” wheels? I have read the whole thread, and it seems to be all over the map...

Sent from my iPhone using Tapatalk

J2Jones · July 29, 2020

33 minutes ago, OilfieldTrash78 said:

Alright, so, what is the biggest Ridge Grappler anyone has been able to run with no running or modifications on a completely stock 2020 AT4 with the OEM 20” wheels? I have read the whole thread, and it seems to be all over the map...

Sent from my iPhone using Tapatalk

I have a 2019 AT4 with stock 20” wheels and am ruining NRG 35x11.5 with the only change zip-tying the drivers side wheel liner forward, closer to the bumper bracket to eliminate a very slight rub that only occurred at full right lock in reverse. No rub after that.

denverk16 · August 3, 2020

To the guys that have installed the 2” rough country level kit on your AT4, are you happy so far with the kit? Any issues? I am pissed off because I had the zone 1.75” kit installed which said 295/60/20 would fit on stock wheels. That turned out to not be true. We did some significant trimming on my truck and I turned into a gas station with a slight hill and it rubbed extremely bad. I am planning to swap the kit out with the 2” from RC in hopes the little extra clearance will help with the rubbing.

Edited August 3, 2020 by denverk16

asalinasz39 · August 8, 2020

Have been running motofab level for a year now on stock duratrac. Just installed 295/70 cooper evolution MT and they clear very well. They are 61.5 lbs which are pretty light compared to others in the same specs weighing on 70+....they measure 34.25”x12”....I could install a 1/4” or 3/8” wheel spacer but I think I will leave it like those for now. No rubbing on UCA so far all good.

Sent from my iPhone using Tapatalk

Jp sierra · August 9, 2020

20 hours ago, asalinasz39 said:

Have been running motofab level for a year now on stock duratrac. Just installed 295/70 cooper evolution MT and they clear very well. They are 61.5 lbs which are pretty light compared to others in the same specs weighing on 70+....they measure 34.25”x12”....I could install a 1/4” or 3/8” wheel spacer but I think I will leave it like those for now. No rubbing on UCA so far all good.

Sent from my iPhone using Tapatalk

What size level is that .. your ball joint angles look fine ..

Jp sierra · August 9, 2020

On 8/8/2020 at 7:14 PM, Jp sierra said:

What size level is that .. your ball joint angles look fine ..

I actually went totally against my better judgment and the judgment of some members of this forum and had a 1.5 RC level added to my 2020 trailboss... it’s only been a couple

of weeks and no issues feels stock... but we will see...don’t get me wrong the angles are not bad ... the ready lift 1-75 sounds great and most likely is due to the upper control arms, but higher lift and doesn’t address the cv axles ... so 1.5 is ok ... almost wish it was. 1.25 inch

Edited August 10, 2020 by Jp sierra