Post your T1 wheel/tire setup

LTeddy · August 30, 2020

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LTeddy · August 30, 2020

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osumason · August 31, 2020

On 8/27/2020 at 1:29 PM, Smrtasp said:

What width of a 20 inch wheel and what brand/model? Your offset will depend a lot upon that. Im running a 20x9 Fuel Rage with a +1 offset running a 295/60/20 which is a 34x11.5 tire. Running a 20x10 will be different. A 20x9 with a +12 offset seems a bit pushed inside (positive pushes the wheel closer inward) but the backspacing may play a factor here with the wheel design. A 285/55/20 should fit a stock GM 20 inch wheel so what you are asking for should work in theory.

I will be going with either the Venomrex 601

Wheel Specs
Size: 20X9.0
Offset: 0 (Chevy/GMC/Dodge)
Backspacing: 5.0" (Chevy/GMC/Dodge)

Or the Black Rhino Shrapnel

20x9.5

Offset 12

Smrtasp · August 31, 2020

1 hour ago, osumason said:

I will be going with either the Venomrex 601

Wheel Specs
Size: 20X9.0
Offset: 0 (Chevy/GMC/Dodge)
Backspacing: 5.0" (Chevy/GMC/Dodge)

Or the Black Rhino Shrapnel

20x9.5

Offset 12

A 285/60 should fit just fine with either wheel size. A 285/60 is about a 33.5 x 11 and a 285/55 is 32.3 x 11. I would personally run the 285/60 as its only .5 inch taller than stock whereas the 285/55 is nearly an inch shorter. That 285/60 under load will probably sit at about 33 inches on the truck. The 285/55 under load will be less than 32 inches and look small on the truck/wheel plus will cause the speed to be off more.

osumason · August 31, 2020

44 minutes ago, Smrtasp said:

A 285/60 should fit just fine with either wheel size. A 285/60 is about a 33.5 x 11 and a 285/55 is 32.3 x 11. I would personally run the 285/60 as its only .5 inch taller than stock whereas the 285/55 is nearly an inch shorter. That 285/60 under load will probably sit at about 33 inches on the truck. The 285/55 under load will be less than 32 inches and look small on the truck/wheel plus will cause the speed to be off more.

Thank you, very helpful.

Northwestern · September 1, 2020

I posted pictures on an earlier date but I got new tires. 2019 RST, 2 inch level, with Black Rhino Apache 18x9 and Cooper AT3 XLT 285/65-18.

Edited September 1, 2020 by Northwestern
Photo

Woody4444 · September 2, 2020

285/55/R20 Nitto Ridge Grapplers

20x10 Fuel Rebels

stock trailboss suspension

Removed mudflaps. No rub

Grey3liter4x4 · September 2, 2020

Got tired of waiting for my lift. Did some driveway fantasizing, emphasis on sizing..

295/60/20 Vision Spyder 20x9 zero offset. Funny there's no rubbing or trimming needed?

Buschman · September 3, 2020

Just went through the whole thread and I think I know what will fit. Just want to throw the question out to the experts on here. I have a 2020 Trail Boss with mud flaps removed and Lund fender flares, they add about 3/4" to the fenders. The stock 18's now sit back about 1 1/2" from the outside of the flares. I want to run a 295/60/20 (34"x11.5") tire, I have the MotoFab 1" level but don't want to put it on unless I have to. What offset on a 20x10 will fit without rubbing? I'm thinking a 0 offset should push the outside out 1.5", am I right?

davidr83 · September 3, 2020

Check this out, it's a neat little tool that will help you out and let's you play with different offsets. It doesn't let you input wheel widths but does let you change tire sizes and compare 2 different combos and shows how they are different

https://tiresize.com/wheel-offset-calculator/

UltraLuke · September 5, 2020

285/65 20 on stock rims no rub has about a 1/2 inch of clearance on inner wheel well

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Is this stock height? Sorry if I missed a previous post.

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Smrtasp · September 5, 2020

On 8/24/2020 at 10:27 AM, Smrtasp said:

Went back and double checked the wheel and tire weights comparing the OEM 22s vs my new setup. Its actually a 19lb difference (Stock is 85lbs total and current setup is 104lbs) so quite a difference. If I change out to a 305/55/20 Nitto that will drop this to 89lbs so only a 4lb increase over stock but a 15lb difference with my current setup. I must have mixed up one of the tires when I was originally researching all of this as I was looking at a ton of different combinations. I also measured the current amount of space between the current 295/60 tire (runs at 33.9 x 11.77 width per Nitto) and my UCA and its right about 1.75 inches on each side and that was measuring off of the raised tread blocks. The 305/55 runs at 33.2 x 12.44 wide on a 9.5 inch wheel which I think will settle more into a 12.25 on a 9 inch wheel plus they are a bit shorter. Should be plenty of room and I have already done a bit of mud flap trimming to better accommodate the 34 inch tires on there now. Needless to say I went ahead and ordered the 305/55/20 Nittos today with the shop I use agreeing to buy my originals back at a decent price as they only have about 1,500 miles on them. I wont have time to get this done until the end of the week at the earliest but will report back once its done.

Had the 305/55/20 ridge grapplers installed last week. Ride is a ton better than it was with the 295/60 E load rated ridge grapplers. The 305s are D load rated vs the OEM C load rated so they are still a bit stiffer than OEM but still the 305s are a 4 ply tire and softer overall. The visual difference on the truck is so small that I cant even tell the difference so didnt bother taking more pictures. I will say that even with some minor trimming of the mud flaps, the 295/60 had some minor rubbing at full lock. There is 0 rubbing now with the 305s. Even though the the 305s are 1 inch wider (11.5 vs. 12.5) on a 20x9 they are right about 12 wide. Im guessing that on a 20x10 they would be closer to the 12.5. With this change my speedo is also back to normal (was off by 2-3 mph depending upon speed) and I removed 60 lbs of rotating mass (15 per wheel/tire). This seems to be the sweet spot for my truck now so hopefully others with a Denali who are contemplating doing something like this will benefit from this info.

Sierra50BMG · September 5, 2020

35x12.50/17 BFG KO2 on a 17x8.5 DX4 Terrain 4.51 backspace -6 offset

Icon 2.5 Extended Travel front coil overs at 2.25” lift 2.25” block in the rear with fabtech stealth shocks

Icons tubular UCA with delta join

Mudflap bracket removal

Front fender liner plastic removed and zip tied away from the tire.

Lots of trimming on the mudflap and cut the bottom screw hole off the metal part of the fender. Bolted the mud flap back through the furthest hole for the bracket and gave me quite a bit of room with stock look.

Rides awesome and looks awesome!

Edited September 5, 2020 by Sierra50BMG
UCA

LTeddy · September 7, 2020

Is this stock height? Sorry if I missed a previous post.

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Yes it is! Stock trail boss height

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UltraLuke · September 9, 2020

I’m apologizing now....I’m sorry....there’s just so much information in this thread. [emoji1750][emoji1750]

2020 Sierra Elevation 2” level....what’s the biggest tire with zero trimming? Most likely Ridge Grapplers on 20 inch stock wheels, and/or 18 inch that I would potentially get. After looking through pictures, I like the look of more tire.

There are so many variations, Trail Boss, AT4, lifts, levels, stock, rim size...on and on haha.

Again, I’m sorry, haha, skip it if it irritates you, no hate needed.

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