- Jul 6, 2021
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Do you think 35" tires will fit a stock Silverado ZR2 ? That would probably be my first upgrade.
Stock gears are 3.23.So I've been hesitant to go too big on my current rig ('07 Frontier) because I want to make sure my gears on the old girl don't get too messed up. From my online research (I'm definitely not an expert), running 35s should push you to change the gear ratio from 3.73 to 4.56. Would improve gas mileage, but also help keep that awesome 6.2L L87 engine with a 10-speed tranny running the way she's meant to.
I'd love to throw some 35s on there, but how many people are matching the gear ratios to those new tires? Especially after dropping $70K+ on a new truck and then adding another $1500-$2K for tires...
That’s not correct. 4.56’s would be what’s recommended for 35’s even though a 4.10 or even 3.73 isn’t horrible depending on the wheel/tire weight.So this YouTuber put a 2” lift on his trailboss. However, he only installed it on the front. This replaced his upper control arm as well as adding a spacer. The end result was that his truck was leveled and had room for 35s with some minor cutting. His wheels don’t look like they are any more offset than factor so adding some offset could make cutting unnecessary.
As for regearing. I’ve got a 2021 Jeep with 37s. Even though it came with 4.10 axles, it still needs re-gearing. This Youtube video has been the guide I’ve found for determining the best gear ratio.
From this video, you take the new tire size and multiply it by the current gear ratio. Then you divide it by the old tire size. That will give you a ratio. From there you pick the closest available gear ratio.
So, 35” x 3.23 / 33 = 3.425. Just a quick search and I see that 3.42 gears exist. You can go higher if you want, but 3.42 is where you should start if you’re re-gearing.