The 2021 Ford Trucks Bronco marked the return of Ford’s short-wheelbase off-road SUV in a form that blended modern trail capability with cues that appeal to longtime Bronco enthusiasts. Its tire fitment is heavily tied to trim level, wheel package, and Sasquatch-equipped configurations, so the first step is confirming the exact version of the vehicle. Across this Bronco lineup, primary sizes range from 255/70R16 up to 315/70R17, and every fitment here is radial. Available choices center on all-terrain radial construction, load specification, and raised white letter styling. For owners balancing factory-inspired stance, trail use, and daily driving, the right decision starts with the correct sub-model and wheel diameter.
Which Tire Size Is Right for The 2021 Ford Trucks Bronco
The 2021 Ford Trucks Bronco uses six primary tire sizes, and the correct one depends on the exact sub-model and wheel package. These fitments span 16-inch, 17-inch, and 18-inch rims, so wheel diameter should be confirmed before anything else. Once that is established, the real comparison is between the radial size used on your Bronco, the vehicle’s stance and use, and the available product specifications within that size.
285/70R17 is a metric radial size that uses a 285-millimeter section width, a 70-series aspect ratio, and a 17-inch rim diameter. On the 2021 Ford Trucks Bronco, this size is used on specific configurations and delivers a substantial sidewall without moving into the largest Sasquatch fitment. Available products in this size include BFGoodrich All-Terrain T/A KO2 options with raised white letter sidewalls and differing load specifications. It is a useful size to evaluate when keeping the Bronco on its correct 17-inch wheel setup while matching the tire to the vehicle’s intended road and off-road use.
Fit(s): Badlands w/Sasquatch Pkg., Big Bend w/Sasquatch Pkg., Black Diamond w/Sasquatch Pkg., First Edition, Outer Banks w/Sasquatch Pkg., Wildtrak, and w/Sasquatch Pkg.
Construction: Radial|Rim: 17 in
315/70R17 is a metric radial size with a 315-millimeter nominal width, a 70-series profile, and a 17-inch rim diameter. On the 2021 Ford Trucks Bronco, it is tied to Sasquatch-package and related configurations, making it a trim-specific fitment rather than a general Bronco size. Its larger section width and overall diameter create a very different fitment situation than the smaller 16-inch, 17-inch, and 18-inch options used elsewhere in the lineup. This is the size to focus on only after confirming the Bronco was built or set up for the corresponding wheel and tire package.
255/70R16 is a metric radial size that combines a 255-millimeter section width, a 70-series aspect ratio, and a 16-inch rim diameter. For the 2021 Ford Trucks Bronco, this size is used on the Base model, so correct wheel diameter matters immediately before comparing tires. Available options in this size include a BFGoodrich All-Terrain T/A KO2 with raised white letter styling, radial construction, and a rim-width range suited to 16-inch applications. It is the right starting point for owners keeping the Bronco on its original-size wheel format rather than moving to a larger-wheel trim setup.
255/75R17 is a metric radial size with a 255-millimeter section width, a 75-series aspect ratio, and a 17-inch rim diameter. On the 2021 Ford Trucks Bronco, this fitment is associated with the Big Bend, where it offers a narrower tread width than some other 17-inch Bronco sizes while still using a relatively tall sidewall. The main decision here is not just choosing any 17-inch tire, but matching the Bronco’s exact trim-level fitment and overall tire dimensions. It should be evaluated against the actual wheel package on the vehicle before considering any move to wider alternatives.
265/70R17 is a metric radial size that uses a 265-millimeter nominal width, a 70-series profile, and a 17-inch rim diameter. For the 2021 Ford Trucks Bronco, this size applies to the Black Diamond and sits between the narrower 255-series fitments and the wider 285 and 315 options. BFGoodrich All-Terrain T/A KO2 choices are available here with raised white letter sidewalls and different load-capacity specifications, giving owners more than one way to match tire capability to use. It is a sensible fitment to compare carefully when the Bronco remains on its correct 17-inch wheel size and trim-specific setup.
255/70R18 is a metric radial size with a 255-millimeter section width, a 70-series aspect ratio, and an 18-inch rim diameter. On the 2021 Ford Trucks Bronco, this size is used on the Outer Banks, making rim diameter the key first check because it does not interchange automatically with the 16-inch or 17-inch Bronco fitments. Its role in the lineup is tied to a distinct wheel package rather than a simple width variation. This is the size to pursue when preserving the Bronco’s existing 18-inch wheel configuration and avoiding confusion with other trims that use different diameters.
Tire fitment on the 2021 Ford Trucks Bronco varies significantly by sub-model, and Sasquatch-equipped versions shift many trims to the same larger size. Checking the exact trim and package matters because this lineup uses three different rim diameters and several distinct metric radial sizes.
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2021 Ford Trucks Bronco Badlands
The 2021 Ford Trucks Bronco Badlands uses a 17-inch radial fitment distinct from both the smaller base-size Bronco models and the larger Sasquatch setup. Tire selection here centers on staying with the correct 17-inch size while comparing all-terrain product specifications and intended use.
The 2021 Ford Trucks Bronco Badlands w/Sasquatch Pkg. uses the larger 315/70R17 radial size shared by several Sasquatch-equipped Broncos. That makes wheel package confirmation especially important before replacement, since this fitment differs substantially from the standard Badlands setup.
The 2021 Ford Trucks Bronco Base uses 255/70R16 radial tires on a 16-inch wheel, making it one of the most distinct fitments in the lineup. Owners should start by confirming that the Bronco still has its original wheel diameter before comparing available tire options in this size.
The 2021 Ford Trucks Bronco Big Bend uses a 17-inch radial size different from the Base, Black Diamond, and Outer Banks. Tire selection should focus on the Big Bend’s specific fitment rather than assuming all 17-inch Bronco tires serve the same role.
The 2021 Ford Trucks Bronco Big Bend w/Sasquatch Pkg. moves to 315/70R17, matching other Sasquatch Broncos rather than the standard Big Bend fitment. That shared larger size makes package verification the key step before choosing a replacement tire.
The 2021 Ford Trucks Bronco Black Diamond uses 265/70R17 radial tires, placing it in the middle of the Bronco’s non-Sasquatch 17-inch fitment range. Choosing a tire means matching that exact size first, then comparing load specification and all-terrain product details.
2021 Ford Trucks Bronco Black Diamond w/Sasquatch Pkg.
The 2021 Ford Trucks Bronco Black Diamond w/Sasquatch Pkg. uses the 315/70R17 radial fitment shared with other Sasquatch-package Broncos. Replacement decisions should begin with that package-specific size, not the standard Black Diamond tire setup.
The 2021 Ford Trucks Bronco First Edition uses 315/70R17 radial tires, putting it in the larger-tire portion of the lineup. Tire selection should stay focused on that specific 17-inch size and the vehicle’s existing wheel and clearance configuration.
The 2021 Ford Trucks Bronco Outer Banks uses 255/70R18 radial tires on an 18-inch wheel, setting it apart from the 16-inch and 17-inch Bronco trims. Owners should confirm the wheel diameter first, then evaluate tires that preserve the proper 18-inch fitment.
2021 Ford Trucks Bronco Outer Banks w/Sasquatch Pkg.
The 2021 Ford Trucks Bronco Outer Banks w/Sasquatch Pkg. switches from the standard 18-inch Outer Banks fitment to 315/70R17. That makes the package designation especially important, since the correct tire depends on which wheel-and-tire setup the Bronco actually has.
The 2021 Ford Trucks Bronco Wildtrak uses 315/70R17 radial tires, aligning it with the larger Bronco fitment group. Selection should center on the correct 17-inch size and on verifying that the vehicle still retains the wheel and suspension setup intended for this package.
The 2021 Ford Trucks Bronco w/Sasquatch Pkg. uses 315/70R17 radial tires, the same larger size found across multiple Sasquatch-equipped trims. The practical takeaway is to verify the package and wheel setup first, then compare replacement tires within that single fitment.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2021 Ford Trucks Bronco Tires for Sale
Available Bronco tire choices here center on BFGoodrich All-Terrain T/A KO2 radials in several of the primary fitment sizes. The product grid is most useful for comparing size-specific load ratings, rim-width ranges, weight, and raised white letter sidewall presentation.
Bronco owners usually need to confirm trim-specific tire size, wheel diameter, and whether a Sasquatch package changes the fitment. These FAQs focus on exact size identification, available tire choices, and the checks worth making before road or trail use.
Tire Size & Fitment
What tire size fits a 2021 Ford Trucks Bronco?
The 2021 Ford Trucks Bronco uses multiple tire sizes depending on sub-model and package: 255/70R16, 255/75R17, 265/70R17, 285/70R17, 315/70R17, and 255/70R18. Every primary fitment in this group is a radial, and the correct size is tied to the Bronco’s exact trim and wheel setup rather than to the model name alone.
A Base model, Outer Banks, and Sasquatch-equipped Bronco can all require different tires, so the safest starting point is the specific sub-model and wheel diameter on the vehicle. If the Bronco has been modified with different wheels or tires, verify the actual setup on the truck before choosing a replacement.
What size rim does a 2021 Ford Trucks Bronco use?
The 2021 Ford Trucks Bronco uses 16-inch, 17-inch, and 18-inch rim diameters depending on configuration. The 255/70R16 fitment uses a 16-inch rim, 255/75R17, 265/70R17, 285/70R17, and 315/70R17 use 17-inch rims, and 255/70R18 uses an 18-inch rim.
That makes wheel diameter the first thing to confirm before looking at tire choices, especially if the Bronco was bought used or has had wheel changes. A 17-inch Bronco tire is not simply a width variation of an 18-inch fitment, so matching the tire to the actual rim diameter is essential.
Why does the 2021 Ford Trucks Bronco have more than one tire size?
The 2021 Ford Trucks Bronco has more than one tire size because its fitment changes by sub-model and package. Standard trims use different wheel diameters and metric radial sizes, while several Sasquatch-package Broncos share the larger 315/70R17 fitment instead of the non-Sasquatch size used by the same trim.
That means tire selection is really a trim-identification exercise before it becomes a product-comparison exercise. Once the correct sub-model and package are confirmed, the remaining choices are more straightforward and usually come down to matching the proper size, rim specifications, and intended use.
Choosing the Right Tire
What should I consider when choosing a 2021 Ford Trucks Bronco tire?
Start with the Bronco’s exact tire size and rim diameter, since this model uses several different radial fitments across the lineup. After size is confirmed, compare construction details within that fitment such as load capacity at stated pressure, rim-width range, tire weight, and the all-terrain design offered for the applicable size.
Use also matters. A Bronco that spends more time on pavement may call for a different balance of specifications than one that regularly sees trail service, but the tire still needs to match the wheel and trim-specific fitment first. Appearance can matter too, especially if raised white letter sidewalls are part of the look you want.
What sidewall styles are available for 2021 Ford Trucks Bronco tires?
The available Bronco products here use RWL sidewalls, meaning raised white letters. That sidewall treatment appears on the BFGoodrich All-Terrain T/A KO2 options offered in the applicable 16-inch and 17-inch sizes, giving these tires a more traditional truck-and-off-road appearance than a plain black sidewall.
Sidewall style does not change the need to match the correct Bronco tire size, but it can affect the overall presentation of the vehicle. Owners trying to preserve a factory-inspired off-road look may care about that detail, while others may be more focused on load specification or rim-width compatibility within the correct size.
What tire series are available for the 2021 Ford Trucks Bronco?
The available products here are from the BFGoodrich All-Terrain T/A KO2 series. That means the current comparison is less about switching between several series names and more about selecting the correct Bronco size, then comparing KO2 options by load rating, weight, and rim-width specification where more than one version is offered.
This matters most in sizes such as 265/70R17 and 285/70R17, where more than one KO2 specification is available. Once the Bronco’s fitment is confirmed, the product grid becomes a way to compare the detailed version of that series rather than a broad brand-versus-brand or series-versus-series decision.
Restoration & Appearance
Which tire should I choose for a period-style 2021 Ford Trucks Bronco?
A period-style approach on a 2021 Ford Trucks Bronco usually means keeping the correct trim-specific tire size and wheel diameter rather than trying to force a different look from another model in the lineup. The available all-terrain radial choices and raised white letter presentation can support a traditional off-road appearance without changing the vehicle’s basic fitment.
Because this is a modern Bronco with several factory-style configurations, visual authenticity starts with the exact sub-model and package. A Sasquatch Bronco, a Base model, and an Outer Banks do not share the same tire proportions, so appearance goals should still follow the size and wheel setup intended for that version.
How does tire construction affect the appearance of a restored 2021 Ford Trucks Bronco?
On the 2021 Ford Trucks Bronco, the primary fitments in this group are all radial, so the construction question is less about bias-ply versus radial appearance and more about preserving the correct tire dimensions and sidewall presentation for the trim. Width, profile, and wheel diameter have the biggest visual effect on how the Bronco sits.
A Bronco with 255/70R16 or 255/70R18 presents differently than one on 315/70R17, even though all are radial tires. For owners concerned with a restoration-oriented or factory-inspired look, matching the sub-model’s actual fitment is usually more important than chasing cosmetic cues detached from the vehicle’s original package.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2021 Ford Trucks Bronco?
Yes, modifications can affect tire fitment on a 2021 Ford Trucks Bronco. Aftermarket wheels, changes in wheel width or offset, suspension lifts, leveling kits, and body or fender changes can alter how a tire clears during steering and suspension movement, even when the tire size matches one of the Bronco’s original fitments.
That is especially important on a Bronco lineup that already spans several sizes and wheel diameters. A used Bronco may no longer be on its original setup, so confirm the actual wheel and tire package on the vehicle and check clearance at full steering lock before assuming a trim-based size is still appropriate.
What should I inspect before driving a 2021 Ford Trucks Bronco on new tires?
Before driving a 2021 Ford Trucks Bronco on new tires, inspect wheel diameter and width, confirm the correct tire size for the sub-model, and make sure the tires are properly inflated. It is also smart to look for any rubbing points at the fenders, suspension, and steering components once the tires are mounted.
A road test should include listening for contact during turns and checking that the Bronco tracks normally. Recheck air pressure after the first drives and inspect the sidewalls and tread for any signs of unusual contact. Those steps matter even more if the Bronco has larger tires, aftermarket wheels, or off-road suspension changes.
How should tires on a 2021 Ford Trucks Bronco be maintained?
Tires on a 2021 Ford Trucks Bronco should be maintained with regular pressure checks, periodic visual inspection, and close attention to tread wear across the full contact patch. Sidewall cuts, bulges, cracking, uneven wear, and slow air loss all deserve prompt attention, especially on a vehicle that may alternate between daily use and trail duty.
Longer periods of storage can make those inspections even more important. Keep the Bronco’s tires clean, protected from prolonged sun exposure when possible, and checked before extended drives or off-road trips. Consistent maintenance helps preserve ride quality and also makes it easier to catch alignment or suspension issues early.
