Larger tires
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4th Gear
Joined: Aug 2018
Posts: 4
Likes: 0
Larger tires
Hi all
So for some reason the 2026 F350 Lariet that I am having built only comes with 18 inch rim and tire. Of course my question is will I encounter any real problems if I remove them and install 20's Please help I would appreciate any input
Thanks
So for some reason the 2026 F350 Lariet that I am having built only comes with 18 inch rim and tire. Of course my question is will I encounter any real problems if I remove them and install 20's Please help I would appreciate any input
Thanks
Logistics Pro
Joined: Jan 2010
Posts: 4,085
Likes: 1,627
As long as the final tire size remains the same as stock, you can put whatever size rims on it you want after you buy it. I will say this - more sidewall at the same or lower tire pressure acts as an insulator from the road, meaning you'll get a bit softer ride on rougher roads. My '25 F350 Tremor rides a bit softer than my '22 Ram 2500 did, despite having leaf springs in the rear instead of coils. The Ram had 20" rims with not a lot of sidewall, whereas the Tremor has 18" wheels with 35" tires, so a LOT of sidewall. Tire pressures are run roughly the same between the two trucks.
5th Gear
Joined: Aug 2025
Posts: 5
Likes: 1
From: Colorado Springs
My AI tells me that the force applied by the torque of the engine, through the wheel and tire, to the road surface is a function of wheel/tire radius. And increasing that radius by 10% (roughly the amount of increase when going from 18 to 20 inch wheel) will reduce the applied force by about 10% as well. So, increasing wheel radius will decrease towing performance.
Lead Driver
Joined: May 2021
Posts: 5,790
Likes: 3,446
From: Uh oh, CA
My AI tells me that the force applied by the torque of the engine, through the wheel and tire, to the road surface is a function of wheel/tire radius. And increasing that radius by 10% (roughly the amount of increase when going from 18 to 20 inch wheel) will reduce the applied force by about 10% as well. So, increasing wheel radius will decrease towing performance.
Logistics Pro
Joined: Jan 2010
Posts: 4,085
Likes: 1,627
My AI tells me that the force applied by the torque of the engine, through the wheel and tire, to the road surface is a function of wheel/tire radius. And increasing that radius by 10% (roughly the amount of increase when going from 18 to 20 inch wheel) will reduce the applied force by about 10% as well. So, increasing wheel radius will decrease towing performance.
Lead Driver
Joined: May 2021
Posts: 5,790
Likes: 3,446
From: Uh oh, CA
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Logistics Pro
Joined: Jan 2010
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I mean AI has its uses as a tool. But it will always need to be checked.
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More Turbo
Joined: Mar 2024
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From: SE Vermont, South Jersey
My AI tells me that the force applied by the torque of the engine, through the wheel and tire, to the road surface is a function of wheel/tire radius. And increasing that radius by 10% (roughly the amount of increase when going from 18 to 20 inch wheel) will reduce the applied force by about 10% as well. So, increasing wheel radius will decrease towing performance.
It has nothing to do with WHEEL radius, only TIRE radius. As long at the tire radius is the same it doesn't matter if the rim is 15" or 24".
Moderator
Joined: Jul 2010
Posts: 12,050
Likes: 1,549
From: Media PA
My AI tells me that the force applied by the torque of the engine, through the wheel and tire, to the road surface is a function of wheel/tire radius. And increasing that radius by 10% (roughly the amount of increase when going from 18 to 20 inch wheel) will reduce the applied force by about 10% as well. So, increasing wheel radius will decrease towing performance.
This AI answer is absolutely correct…………unless the OP goes and puts tires on those new wheels, then it’s all about the tire size, not the wheel size.
I am big fan of the other AI, Actual Intelligence.
Mountain Pass
Joined: Jul 2025
Posts: 116
Likes: 77
It’s like going to a really nice public library that’s known for quickly providing answers you’re looking for, with one catch: the answers sound authoritative & are provided in a formal slick & polished way, but at least 50% of the info is pure hallucination BS. It’s like going to Earl Schieb for stock tips, are they gonna Wash away the next time it rains?
2nd Gear
Joined: Nov 2025
Posts: 2
Likes: 0
The AI answer is correct - the more distance from the axle to the ground, the less thrust applied. It's just physics.
See https://www.sunautoservice.com/blog/...nd-performance
See https://www.sunautoservice.com/blog/...nd-performance
Fleet Mechanic
Joined: Dec 2012
Posts: 1,563
Likes: 533
From: DFW
The AI answer is correct - the more distance from the axle to the ground, the less thrust applied. It's just physics.
See https://www.sunautoservice.com/blog/...nd-performance
See https://www.sunautoservice.com/blog/...nd-performance
Logistics Pro
Joined: Jan 2010
Posts: 4,085
Likes: 1,627
The AI answer is correct - the more distance from the axle to the ground, the less thrust applied. It's just physics.
See https://www.sunautoservice.com/blog/...nd-performance
See https://www.sunautoservice.com/blog/...nd-performance
The shop that posted the article you linked to 'dumbed it down' too far - a WHEEL is not a TIRE. The TIRE is what contacts the road, the WHEEL is also known as the RIM - what the tire gets mounted on. Tire and wheel are two different terms that shouldn't be used interchangeably. If that is a reputable shop, they should know that and make the difference clear.
So I will re-state that the AI answer provided above is INCORRECT, it doesn't matter what WHEEL SIZE you have, it matters what TIRE SIZE you have.
Lead Driver
Joined: May 2021
Posts: 5,790
Likes: 3,446
From: Uh oh, CA
The AI answer is correct - the more distance from the axle to the ground, the less thrust applied. It's just physics.
See https://www.sunautoservice.com/blog/...nd-performance
See https://www.sunautoservice.com/blog/...nd-performance