Ford Bronco Wheel Bolt Pattern, Rim Size, Hub Bore, Offsets And Tire Size
Introduction
Among American automotive history's most iconic 4x4s is the Ford Bronco. From its tough start in the 1960s to its high-tech comeback in the 2020s, the Bronco has always stood for adventure, dependability, and freedom. One thing is still crucial, whether you're customizing the new Sasquatch edition or restoring a first-generation classic—getting your wheel fitting perfect. Wheel fitting transcends appearances to include other considerations. It speaks to performance, safety, and utility. The incorrect offset or bolt pattern might throw off your handling, damage suspension components, or create rubbing.
From the newest sixth generation, the original 1966 model, this article is meant to walk you through the right wheel specifications for every iteration of the Bronco. For every version, you will find comprehensive information on bolt patterns, rim diameters, hub bores, offsets, and advised tire sizes. We will also discuss what kind of changes you could require depending on your intended size, width, or degree of aggressiveness with your setup.
The correct wheels will enhance the performance and appearance of your Bronco, whether you prefer off-roading, overlanding, or just touring your neighborhood paths. We have compiled this so you may boldly buy wheels and tires that will not only fit but also exactly match.
Let's investigate what wheels your Bronco was built to run on.
Ford Bronco 6th Generation (2021 – Present)
More than simply nostalgia, the Ford Bronco's comeback in 2021 arrived swinging with fierce off-road capability, contemporary engineering, and a design that honored the original. Built on the T6 platform and shares some underpinnings with the Ranger, the 6th Gen Bronco is available in both 2- and 4-door variants, but don't get it twisted—this machine is intended for the trail.
Let's consider fitting. On the sixth-generation Bronco, the factory bolt pattern is 6x139.7mm, sometimes referred to as 6x5.5". Off-road vehicles and SUVs exhibit this typical pattern, which provides a large spectrum of aftermarket wheel choices. Based on trim level and wheel size, most stock offset values range between +30mm and +55mm; the original hub bore is 93.1mm. Certain cuts, like the Sasquatch package, have more aggressive tire configurations and beadlock-capable wheels with a wider stance.
Although many aficionados choose 17x8.5 or 17x9 aftermarket wheels to get a better stance and fit beefier tires, factory rim diameters range from 16" to 18" Wheels. Usually starting with 255/70R16, the tire size on Sasquatch-equipped cars rises to the R17. With the correct suspension changes and trimming, you can quickly push into a 35" or even 37" tire area, whether you are raising your Bronco or installing fender flares.
With the 6th Gen Bronco, one item to consider is its advanced off-road systems and high-tech safety. Sensors and turning radius can be affected by wheel width, size, and offset. Either using a suitable installation guide that guarantees no rubbing or loss of performance, or selecting wheels made with the Bronco's fitment standards in mind, is always recommended.
Ford Bronco 5th Generation (1992 – 1996)
Made between 1992 and 1996, the 5th version of the original Ford Bronco represented the last run. Although it offered a little more refinement, this model maintained the tough 2-door full-size SUV form that enthusiasts had come to adore. Ford made several comfort-oriented changes, rounded front fascia, driver airbags, and other tweaks that would make daily use somewhat more pleasant while still being trail-capable.
Regarding wheel fitment, the 5th Gen Bronco used a 5x139.7mm bolt pattern—also known as 5x5.5’s. Many older Ford vehicles have this bolt design, which allows for rather simple wheel replacements inside the vintage Ford family. The hub bore is 87.1mm, and the usual offset range is +12mm to 0mm, which lets off-roaders and classic truck enthusiasts have that deep-dish look they want.
Most factory rim sizes were 15 inches, usually in 15x8 measurements. While 15" wheels are great for flexibility and tire sidewall, many owners upgrade to 16" or 17" rims to access modern all-terrain or mud-terrain tire options. The stock tire size was usually around 31x10.50R15, but the Bronco has the clearance to support up to 33" tires with no lift, and up to 35" tires with a modest 2"–4" suspension lift.
If you intend to run aftermarket wheels, just keep in mind the backspacing—typically around 3.75"-- 4.00"—works well to prevent rubbing and keep things aligned with the factory stance. The 5th Gen is a favorite for off-road enthusiasts and restorers alike because of its blend of old-school simplicity and modern-day driveability.
Ford Bronco 4th Generation (1987 – 1991)
While it still rode on the same full-size frame and carried the unmistakable Bronco DNA, this generation leaned into modernization with features like rear anti-lock brakes and electronic fuel injection, refining the ruggedness of its predecessor with more aerodynamic styling, updated electronics, and a stronger emphasis on safety and comfort.
The hub bore remains at 87.1mm, and the offset is typically between 0mm and +12mm, depending on factory trim. This generation continued to use the 5x139.7mm (5x5.5" bolt pattern, making it compatible with a wide variety of wheels shared across full-size Ford trucks of the era. These specs offer a flush fitment and decent stance without pushing too far out of the fenders.
Although some grades came with 15x7 configurations, 15" wheels were the standard back then; drivers wishing greater tire options and more aggressive appearance sometimes upgraded to 16" or 17". Stock rim widths for this generation were generally 15x8. Most fourth generation Broncos from the factory run 31x10.50R15 tires. Its body and suspension system help to fit 33" tires with minimum changes; a 2.5"–4" raise will enable 35s.
Whether you're restoring or upgrading, it's easy to find compatible wheel setups without worrying about odd fitment specs. Just be mindful of backspacing—around 4’s sweet spot for avoiding clearance issues with the suspension or fenders. This generation gives you the flexibility to run the wheels that fit your style, whether you're building a mud rig or just giving it a tougher stance.
Ford Bronco 3rd Generation (1980 – 1986)
Running from 1980 to 1986, the third-generation Ford Bronco was the first Bronco to adopt a more aerodynamic front end and incorporate better fuel economy strategies, including the use of lighter materials. This generation also introduced independent front suspension (Twin Traction Beam), which greatly changed how the vehicle handled on and off-road. Despite this modernization, it still retained a solid rear axle and body-on-frame toughness.
The third Gen Bronco follows the 5x139.7mm bolt pattern, which remained a Ford truck standard for years; the hub bore on these models is also 87.1mm, and depending on the OEM wheel, they usually came with an offset between +10mm and 0mm; these dimensions help maintain a stock look and proper wheel spacing while still allowing room for aftermarket upgrades.
Many Bronco owners choose to upgrade to 15x8 wheels to enable wider all-terrain tires; if you're planning to run 33" tires, the 3rd Gen can handle them with very minimal lift or fender trim. Factory rim sizes were mostly 15x6.5 or 15x7, and the standard tire size varied from 235/75R15 to 31x10.50R15, especially on higher trims or off-road-oriented packages. Although it is feasible to go up to 35" tires, usually you will need a minimum of 3" suspension height.
Although the suspension design improved road comfort, it also limited extreme movement relative to the solid axle configurations in previous versions. Still, this generation is a good mix for daily driving and light to moderate off-roading. Its vintage '80s look and devoted following make it a perfect venue for projects requiring both charm and utility. You won't have trouble locating wheels that bolt up clean, just keep within the proper offset and backspacing range.
Ford Bronco 2nd Generation (1978 – 1979)
Made for just two years between 1978 and 1979, the 2nd generation Ford Bronco was a radical departure from the little first-generation cars. Constructed on the F-100 pickup chassis, this generation produced the Bronco as a full-size SUV for the first time. It presented extra room, a detachable fiberglass roof, and outright off-road potential straight from the factory. Thanks to its forceful posture and traditional square-body presence, this body style, which had a limited run, remains a favorite among collectors and off-road builders.
Using a 5x139.7mm bolt pattern, the fit on the second-gen Bronco matches that of later full-size models. The hub bore is 87.1mm, and these trucks usually came with offsets varying from +8mm to 0mm, therefore enabling larger wheels free from undue poke or rubbing. Period-correct alloy wheels or deep-dish steelies would find these characteristics perfect.
Usually matched with L78-15 tires, the 2nd Gen Bronco was fitted from the manufacturer with 15x6.5 or 15x7 wheels, which roughly correspond to modern 235/75R15 proportions. The Bronco can carry 33" tires with no lift and up to 35s with a small 2"–4" suspension upgrade thanks to its higher ride height and broad fenders; some wheel configurations may call for some little trimming should you push the offset too much into the negative zone.
Whether you’re doing a full restomod or building a trail truck, the 2nd Gen Bronco provides a solid base with enough clearance and compatibility to get creative with your wheel setup. This generation shares many components with F-series trucks of the same era, thus finding aftermarket wheels is rather easy. Just be sure you verify your backspacing—around 3.75’–4.00’s safe zone for fitment that won't stress your suspension or lead to clearance issues.
Ford Bronco 1st Generation (1966 – 1977)
Built on its platform, it featured a short wheelbase and solid axles front and rear, making it a true off-road warrior that still turns heads at car shows and trails both. Ford's answer to the Jeep CJ and International Scout was small, boxy, and designed to conquer rugged terrain right off the showroom floor.
Wheel fitment on the first-generation Bronco is a little different than later models. It uses a 5x139.7mm bolt pattern, just like the full-size trucks that came later, which helps when hunting for period-correct or custom wheels. However, the hub bore stayed at 87.1mm, so always double-check compatibility when choosing aftermarket options. The typical offset range is +6mm to 0mm, and anything too aggressive can cause rubbing issues unless you’ve modified your suspension.
From the factory, these Broncos ran on 15x5.5 or 15x6 wheels, often wrapped in narrow bias-ply tires. Today, most owners upgrade to 15x7 or 15x8 wheels to accommodate wider all-terrain or mud-terrain tires. Common modern tire upgrades include 30x9.50R15 and 31x10.5R15, which give the Bronco a more planted stance without needing significant lift. You can fit 33” tires with a mild suspension lift, and even 35s with more aggressive suspension and trimming.
Just make sure your backspacing is in the 3.75’–4.25’ range to avoid issues with steering or suspension contact. With its short overhangs and narrow frame, this classic Bronco was built to climb—and still does it in style. Whether you’re building a period-correct restoration or an aggressive crawler, the wheel fitment gives you enough room to personalize.
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Faq’s
Can newer wheels fit on older Broncos?
The number of lugs counts, thus they are not exactly interchangeable; the sixth Gen Bronco uses a 6x139.7mm bolt pattern while earlier generations (1st through 5th) use 5x139.7mm. If the bolt pattern, hub bore, and backspacing line up and you use the correct lug adapter or conversion kit, some crossover is possible.
What’s the biggest tire I can fit without lifting my Bronco?
The 6th Gen can go up to 35s on Sasquatch trims with no lift; for most full-size Broncos (2nd through 5th Gen), you can normally run 31s on factory suspension, depending on the wheel offset and width; for vintage 1st Gers, 31s fit easily, and 33s are achievable with minimal mods.
Will changing my offset affect handling or rubbing?
Unless you're going for a specific stance and are ready to make trimming or suspension changes, offset influences how far the wheel sticks out and can affect both handling and clearance. Too much negative offset can push your wheels out and cause rubbing on fenders; too much positive offset can pull them in and risk contact with suspension parts.
Are wheel spacers safe?
While spacers can help fine-tune stance or fit aftermarket wheels, they should not be used to force wheels that just aren't compatible. If you are utilizing high-quality spacers with proper hub-centric rings and torque standards, then yes.
Conclusion
Proper wheel fitment is essential for maintaining both the performance and appearance of your Ford Bronco. Whether you're working on a vintage first-gen or customizing a modern sixth-gen model, understanding specifications like bolt pattern, offset, hub bore, rim size, and tire compatibility is key to achieving a safe and functional setup. Each Bronco generation has its fitment characteristics, and selecting the right wheels ensures optimal clearance, handling, and style. Incorrect fitment can lead to premature wear, rubbing issues, or even damage to your suspension components. This guide was created to provide clarity and confidence as you choose wheels tailored to your Bronco’s design and your driving needs. Always consult a reliable fitment tool or professional before purchasing to avoid costly mistakes. With the right setup, your Bronco will not only stand out—it will perform exactly as it should, on-road or off-road, for years to come.