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

bryceadams22 · July 22, 2020

2” RC level with 35x12.50x20 and 1/4 wheel spacer. No rub with considerable trimming. Got it back today and love it.

RadoPhan · July 22, 2020

RadoPhan, as requested. Note my truck is an AT4 with the Rough Country 2" leveling kit. The other guy in the linked thread below is also running a leveling kit WITH the RL upper arms. It should be apples-to apples comparison between our trucks. FWIW, just physically eyeballing/looking at the OEM vs RL upper arms side -by-side show the OEM arms offer more clearance. FWIW, I read this same info on a number of different forums.

Thanks!!! According to the measurements I would be 0.31” away from the UCA and I think I’m about 1/2” now but that’s eyeballing it. With 6mm spacers it might work.

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bryceadams22 · July 22, 2020

14 hours ago, bryceadams22 said:

2” RC level with 35x12.50x20 and 1/4 wheel spacer. No rub with considerable trimming. Got it back today and love it.

The truck is sitting on a decline, the front is actually just a hair higher than the back

Supercup · July 23, 2020

On 7/21/2020 at 3:15 PM, RadoPhan said:

Can you point me in the right direction on these measurements?

Here’s my clearance now on 295/70R18 on stock TB rims with stock lift. It’s pretty tight. About 1/4” - 1/2” but hard to tell from pics.

Here is my 2019 AT4 with RL SST 2" level kit and RL UCA - photos of clearance - with 275/65/18 Goodyear Duratrac's - about 5/8" clearance remains. I would say you lose at least a 1/4" and more likely closer to a 1/2" of clearance with RL UCA vs stock - but you get better geometry angles - that is the trade off. I could fit 285/65 - but 295/65 would be really close.

Edited July 23, 2020 by Supercup

RadoPhan · July 23, 2020

Here is my 2019 AT4 with RL SST 2" level kit and RL UCA - photos of clearance - with 275/65/18 Goodyear Duratrac's - about 5/8" clearance remains. I would say you lose at least a 1/4" and more likely closer to a 1/2" of clearance with RL UCA vs stock - but you get better geometry angles - that is the trade off. I could fit 285/65 - but 295/65 would be really close.

Thanks for sharing! I must’ve done the math wrong. Looks like I’ll rub even with 1/4” spacers. Unless you have different backspacing on your rims. Do you know the specs?

5/8” (0.625) - tire difference 0.6 (11.6-11.0) - wheel offset difference 0.314961 (26mm-18mm) = -0.289961

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Supercup · July 23, 2020

2 hours ago, RadoPhan said:

Thanks for sharing! I must’ve done the math wrong. Looks like I’ll rub even with 1/4” spacers. Unless you have different backspacing on your rims. Do you know the specs?

5/8” (0.625) - tire difference 0.6 (11.6-11.0) - wheel offset difference 0.314961 (26mm-18mm) = -0.289961

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Your math is correct - spacing measure in the photo is with Method NV 18" x 9" which are 18mm offset - the stock wheels are 26mm offset - so the Method wheels are giving me 6mm or 0.312" of added clearance (moving the wheel center away from the UCA). Backspacing is 5.75"

Stock Wheel spec

275/65R18 113Q

8.5Jx18 ET26

6x139.7

Method Link: https://www.methodracewheels.com/products/nv-black?variant=349582491 - Part number MR 305 890605 18 - drop down menu of choices

Link wheel offset: https://www.lesschwab.com/article/what-is-wheel-offset.html

Edited July 23, 2020 by Supercup

RadoPhan · July 23, 2020

That spacing measure in the photo is with Method NV 18" x 9" which are 18mm offset - If I recall correctly the stock wheels are 26mm offset - so the Method wheels are giving me 6mm or 0.312" of added clearance (moving the wheel center away from the UCA). Backspacing is 5.75"

Stock Wheel spec

275/65R18 113Q 8.5Jx18 ET26 6x139.7

Method Link: https://www.methodracewheels.com/products/nv-black?variant=349582491 - Part number MR 305 890605 18 - drop down menu of choices

Link wheel offset: https://www.lesschwab.com/article/what-is-wheel-offset.html

Hopefully someone can answer this question but wouldn’t the backspacing be more relevant to the tires getting close to the UCA regardless of offset? Only asking because the difference from these two rims is 8mm in offset but the backspacing difference is only .02” (OEM 5.77” vs Methods 5.75”). My understanding of this is the backspacing is the distance from the mounting surface to the inner lip so logically that would make sense but I could be wrong.

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Supercup · July 23, 2020

10 minutes ago, RadoPhan said:

Hopefully someone can answer this question but wouldn’t the backspacing be more relevant to the tires getting close to the UCA regardless of offset? Only asking because the difference from these two rims is 8mm in offset but the backspacing difference is only .02” (OEM 5.77” vs Methods 5.75”). My understanding of this is the backspacing is the distance from the mounting surface to the inner lip so logically that would make sense but I could be wrong.

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You make a good point - - was not aware of stock back spacing - but that being said if stock back spacing is 5.77" - then it should be a 38MM offset (8.5" wheels - -5.77" - 4.5" center = 1.52" or 38MM of offset)? Also the methods are 1/2" wider than stock in this discussion (9" vs 8.5") - so the section width of the tire measured of 11" is on an 8" wheel - and on a 9" wheel you will pick up 0.2" to 0.4" of section width - so you have to take that into account as well.

End of the day only way to know for sure is to try them!

Edited July 23, 2020 by Supercup

RadoPhan · July 23, 2020

You make a good point - - was not aware of stock back spacing - but that being said if stock back spacing is 5.77" - then it should be a 38MM offset (8.5" wheels - -5.77" - 4.5" center = 1.52" or 38MM of offset)? Also the methods are 1/2" wider than stock in this discussion (9" vs 8.5") - so the section width of the tire measured of 11" is on an 8" wheel - and on a 9" wheel you will pick up 0.2" to 0.4" of section width - so you have to take that into account as well.

End of the day only way to know for sure is to try them!

Lol yeah that’s what I’m fearing is I put everything together and then try to put the tire on and nothing fits. I’ll for sure get a 6mm bora spacer to keep handy during install just in case.

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Supercup · July 23, 2020

Good luck!

Jp sierra · July 23, 2020

On 7/21/2020 at 8:34 PM, sfakeith said:

Yes, probably depends on the tire but 35x12.50r18 Patriot M/Ts fit on mine with only the 1.5 RC level.

Nice .. I just picked up my 2020 TB and have scheduled a RC 1.5 level kit to be installed next week... can you send a picture of the upper control arm ball joints ... any issues with the RC LEVEL?

BetaX · July 23, 2020

4 hours ago, Jp sierra said:

Nice .. I just picked up my 2020 TB and have scheduled a RC 1.5 level kit to be installed next week... can you send a picture of the upper control arm ball joints ... any issues with the RC LEVEL?

Get new upper control arms whatever kit you buy since you'll be at 3.5" with your TB. Not worth the risk to end up with a broken upper on these trucks.

Edited July 23, 2020 by BetaX

Dersch · July 23, 2020

For anyone considering a level or lift i highly recommend the Readylift SST kit. It comes with new upper control arms. Everything i researched this is the kit people recommend cause it comes with new upper control arms

I fit 35x12.5 on 20x10 +0 offset with very minimal mud flap trimming.

With the tow mirrors it makes the truck look so much bigger almost like a 2500.

Jp sierra · July 23, 2020

47 minutes ago, BetaX said:

Get new upper control arms whatever kit you buy since you'll be at 3.5" with your TB. Not worth the risk to end up with a broken upper on these trucks.

Did you get the RC upper control arms? How did they work out?

MAK2013 · July 23, 2020

5 minutes ago, Jp sierra said:

Did you get the RC upper control arms? How did they work out?

He got the Readylift UCAs with the SST kit. I’ve heard of people using RC arms, but I strongly recommend against them. I’ve seen some scary stuff with people using Rough Country in my shops. We actually refuse to sell/install their lift kits. Their other parts are ok but their suspension equipment tends to be subpar for very little savings

Edited July 23, 2020 by Alex Kemple
SP