Wheels and tires

airborne89 · August 8, 2019

I'll be going with a 2" lift on my 2019 Silverado LTZ Z71 with the 6.2 and plan on changing out the wheels and tires soon after. The truck currently has 275/60-R20 from the factory, a 33" tire, and I would like to go with a 35x12.5 R20 tire. Has anyone done this and how is the fit? Also does anyone know the factory offset and backspacing on the factory wheels and what backspacing I would need to go with to push them out for the new 12.5 wide tires? The current tire width should be about 10.8". I assume the current gearing with the 6.2 and 10 speed would accommodate this change and I would just need something to correct the speedometer. As far as the speedometer is that something the dealer can do or will I need an aftermarket product for that?

Another question I have is I see a ton of posts on here about people putting on the 2" lift to go up to a 33" tire. Unless I'm mistaken the factory tires I have are already 33" so by raising the body 2" with the lift I should be able to add 2" to the total diameter of the tires. Am I tracking this correctly or am I missing something? If I'm mistaken what would be the largest tire I could go with without needing to cut or trim anything, assuming the wheels have the proper backspacing.

Thanks

gothp28 · August 8, 2019

There is plenty information on this site about this. You will not be able to fit 35 s with an aftermarket rim. The only ones I've seen make it work are on the trail boss or the at4 and a lot of them have a slight rub. You should be able to do a search on 35 x12.5. I subscribe to thread and get pages on it.

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cltsig · August 8, 2019

I have the same truck and am looking at rims/tires/level not lift. Not sure about speedo but you have to remember 2" isn't a heckuva lot of lift. Are you "lifting" the front 2" via level to make the whole truck level? Anyway, the limitation is more the wheel wells and tire width/offset more so than the 2" vertical. I'm not an expert but this is what I've gathered. I also found the below somewhere which will help you know what you have now.

2019 Chevy Silverado 1500 wheels and tires.

Wheels:
Size: 20x9
Bolt pattern: 6x139.7
Offset: 28
Hubsize: 78.1
Finish: Gray Machined
OEM Part #: 23377015
Hollander #: 5916
Additional info: N/A
Tires:
Brand: Bridgestone
Model: Dueler A/T RH-S
Size: 275/60R20
Load index: 115
Speed index: S
Tread depth: New
Additional info: N/A

Accessories:
Center caps: Included
TPMS Sensors: NOT Included
Lug Nuts/Bolts: NOT Included

Rob41 · August 8, 2019

So I'm guessing when you say 2" lift you're talking about a leveling kit? At any rate, you're going to end up with rubbing to deal with if you choose the 12.50 tire. I installed tires that measure out at 35.12 x 11.77 and a ReadyLIFT 4" SST lift. That requires removal of the metal bracket behind the front mud flaps. Also needed to drill a small hole in the front of the wheelhouse liner to use zip ties to pull the liner forward. It noe has a factory appearance without any rubbing. If you try to install 12.50 tires you're likely going to have to do all that plus trimming as well, ymmv.