Max tire size question

Reply Subscribe

Thread Tools

Search this Thread

Aug 7, 2023 | 04:16 PM

#16

4wd6.7L

Lead Driver

Joined: Dec 2020

Posts: 8,640

Likes: 2,435

Quote:

Originally Posted by Hooksjoint

Does anybody here know for certain what is the largest tire you can put on a '23 with 20" factory wheels? I'm anticipating picking up my KR later next month and I would like to have the new tires with me at trade. No lift and with absolutely no rubbing. Thank you in advance!

Post #9 should give you an idea. That tells you that a 37x12.5 rubs only slightly on the sway bar just before full lock. I take that to mean that a tire with a smaller diameter, or narrower width, will not rub. Stock 18" or 20" wheel doesn't make a difference, same width and offset.

Aug 7, 2023 | 05:02 PM

#17

Joe T

Hotshot

Joined: Mar 2017

Posts: 10,180

Likes: 1,378

From: Chaz

Quote:

Originally Posted by Hooksjoint

A 295/65/20 would be the biggest that meets all the ratings. May look a little stuffed but maybe not.

Aug 7, 2023 | 11:07 PM

#18

StonedGrey

Laughing Gas

Joined: Jun 2018

Posts: 803

Likes: 103

Quote:

Originally Posted by Bugzilla46310

I disagree!

this bigfoot is parked at my local grocery store %99 of the time.
Bigfoot family purchased the grocery store 5-6 years ago.
Crazy tall

Aug 8, 2023 | 08:48 AM

#19

Summers22

More Turbo

Joined: Jul 2023

Posts: 744

Likes: 334

295/70/18 Falken Wildpeak AT3W on factory 2019 suspension. No issues.

Aug 8, 2023 | 11:32 AM

#20

GAZZILLA

Cargo Master

Joined: Apr 2021

Posts: 2,592

Likes: 1,671

From: NW Wyoming USA

Quote:

Originally Posted by Summers22

295/70/18 Falken Wildpeak AT3W on factory 2019 suspension. No issues.

The 2019 and older are taller than the 2020 and newer, slightly different animal.

Aug 8, 2023 | 11:37 AM

#21

RandyinTN

Thread Starter

Fleet Mechanic

Joined: Jun 2018

Posts: 1,466

Likes: 538

From: Wasilla, AK

If 35’s are installed how much would the speedometer be off at 70mph?

Aug 8, 2023 | 11:47 AM

#22

Rwhjr

Cargo Master

Joined: Mar 2021

Posts: 2,044

Likes: 1,336

Quote:

Originally Posted by GAZZILLA

The 2019 and older are taller than the 2020 and newer, slightly different animal.

But really the issue with a tire up to about 37” with factory wheels it wasn’t the clearance from ride height etc.

it’s more so the backspacing making tires rub on radius arms and sway bars. So in that case all the 17-22s are just about equal. Even with a 6” lift if you run 37x12.50s on a 2017 it’s going to run when you turn.

supposedly the 23s have a hair more clearance in this department and are having less run issues with bigger tires despite being a little lower. In which case a cheap small level kit would fix if height was an issue.

Aug 8, 2023 | 12:08 PM

#23

Joe T

Hotshot

Joined: Mar 2017

Posts: 10,180

Likes: 1,378

From: Chaz

Quote:

Originally Posted by RandyinTN

If 35’s are installed how much would the speedometer be off at 70mph?

They are so close to factory 20s just run that programming.

Use Waze app and check it though.

FTE Stories

Ford Trucks for Ford Truck Enthusiasts

10 Ways Ford is LOSING to the Competition

Joe Kucinski

Top 6 Best Deals Available on New Fords & Lincolns Right Now

Brett Foote

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Verdad Gallardo

Top 10 Fords at 2026 Carlisle Ford Nationals

Joe Kucinski

3 Best / 3 Worst Parts of Modern Ford Ownership

Brett Foote

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

Pouria Savadkouei

Every 2026 Ford Engine Explained

Brett Foote

10 Ugly Ford Trucks That We Still Kinda Love

Joe Kucinski

10 Things Every Truck Owner NEEDS (2026 Edition)

Michael S. Palmer

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Verdad Gallardo

Aug 8, 2023 | 12:30 PM

#24

GAZZILLA

Cargo Master

Joined: Apr 2021

Posts: 2,592

Likes: 1,671

From: NW Wyoming USA

Quote:

Originally Posted by RandyinTN

If 35’s are installed how much would the speedometer be off at 70mph?

Running 34.5” 295/70/18 Toyo M/T’s, truck was indicating 70, Waze App was indicating 72. Changed the number in Forscan from 2560 to 2610 to correct it.

Aug 12, 2023 | 02:23 PM

#25

RandyinTN

Thread Starter

Fleet Mechanic

Joined: Jun 2018

Posts: 1,466

Likes: 538

From: Wasilla, AK

Anyone running the Michelin Defender LTX M/S in 295x70x18?
If so, what is your opinion of the tire?

Aug 12, 2023 | 03:59 PM

#26

Poncho450

Lead Driver

Joined: Oct 2014

Posts: 5,957

Likes: 1,362

From: NY/Canada border

I had 325's on a 2017. No rub or problems with Ford molded mud flaps. Truck was box stock, no lift and no level.

Apr 8, 2024 | 02:44 PM

#27

Tightlines

4th Gear

Joined: Feb 2024

Posts: 4

Likes: 1

Quote:

Originally Posted by dubnasty216

I’m running 35x12.5 ridge grapplers on 20x10 wheels with -19mm offset on my 23 with 6.7 standard output with NO suspension work done yet. Only have very minor rubbing on the passenger side plastic where a mud flap would be if I had them

Have any pictures? I am hoping this is true as I want to run -12 with 35x12.5x20. Thanks for posting this information.