Introduction
Upgrading tires is one of the first modifications many Ford Bronco owners consider. Larger tires improve ground clearance, traction on rough terrain, and give the Bronco the aggressive stance that makes these vehicles look so capable on the trail. But choosing the right tire size isn’t always straightforward. The answer to “what fits” depends on several factors, including the Bronco trim, whether the vehicle has the Sasquatch package, the wheel offset, and how much modification you’re willing to do.
Many owners want to run bigger tires without installing a lift kit or cutting parts of the vehicle. Others want to know whether common upgrades like 35-inch or even 37-inch tires will cause rubbing, require crash bar removal, or affect the speedometer. These are important questions because tire upgrades can influence handling, fuel economy, suspension performance, and even the weight carried by the rear spare tire mount.
In this guide, we break down what tire sizes typically fit on the Ford Bronco, what changes when you move from 33s to 35s or 37s, and the common issues owners run into along the way. We’ll also explain the key factors that determine fitment—like wheel offset and suspension clearance—and recommend a few useful products that help make tire upgrades easier and safer.
Quick Answer: What Tire Size Fits a Ford Bronco Without a Lift?
For most Ford Broncos, 33-inch tires are the safest upgrade without requiring suspension changes. Many owners can run 35-inch tires, especially on Sasquatch-equipped Broncos, though non-Sasquatch models may need adjustments such as crash bar removal or different wheel offsets. 37-inch tires usually require a lift and additional modifications to avoid rubbing during steering and suspension travel.
If you are looking for a spare tire cover, for your 35" tire, Coverdom offers a wide selection of designs available in this size - Coverdom 35" Tire Covers
What Tire Size Comes Stock on the Ford Bronco?
Before upgrading tires, it helps to understand what the Ford Bronco comes with from the factory. Tire size varies depending on the trim level and whether the Bronco includes the Sasquatch off-road package, which means not every Bronco starts with the same clearance or capability.
Most non-Sasquatch Broncos come equipped with tires in the 30–32 inch range, which are designed to balance everyday comfort with light off-road performance. These sizes work well for daily driving and moderate trail use while maintaining good fuel economy and handling.
The Sasquatch package, however, changes the setup significantly. Broncos equipped with Sasquatch come from the factory with 35-inch tires, along with wider fender flares, different wheel offset, and suspension components designed to support the larger tires. According to Ford’s official Bronco specifications, these upgrades are engineered to provide additional clearance and improved trail capability.
At the top of the lineup sits the Bronco Raptor, which comes factory-equipped with 37-inch tires and a specialized high-performance suspension system designed specifically for aggressive off-road driving.
Stock Ford Bronco Tire Sizes by Configuration
| Bronco Configuration | Typical Stock Tire Size | Approx. Diameter | Notes |
|---|---|---|---|
| Base / Big Bend / Outer Banks (non-Sasquatch) | 255/70R16 – 265/70R17 | ~30–31" | Balanced for daily driving with moderate off-road capability |
| Black Diamond / Badlands (non-Sasquatch) | 265/70R17 | ~31–32" | Slightly more off-road focused tire setup |
| Any Trim with Sasquatch Package | 315/70R17 | ~35" | Includes wider fender flares, different wheel offset, and suspension tuned for larger tires |
| Bronco Raptor | 37×12.50R17 | ~37" | Factory high-performance off-road configuration |
Understanding your Bronco’s starting tire size and configuration is important because it determines how easy it will be to upgrade later. Broncos that already have the Sasquatch package generally have more clearance for larger tires, while non-Sasquatch models may require additional adjustments when moving to bigger sizes.
If you are not sure, how to read your tire size and what the numbers mean, Bridgestone explains it clearly in their guide.
You can also use our Spare Tire Size Calculator to determine the diameter of your tire.
What Tire Size Fits on a Stock Non-Sasquatch Bronco?
Many Ford Bronco owners want to upgrade their tires without installing a lift kit. If your Bronco does not have the Sasquatch package, the factory setup usually includes tires in the 30–32 inch range, which leaves some room for moderate upgrades but also introduces a few limitations.
For most non-Sasquatch Broncos, 33-inch tires are the safest and easiest upgrade. This size generally fits without suspension modifications and rarely causes rubbing during normal driving. Because of this, 33s are often considered the best “plug-and-play” tire upgrade for daily-driven Broncos that occasionally see trails.
Running 35-inch tires on a non-Sasquatch Bronco is possible, but it depends on several factors such as wheel offset, tire width, and how much rubbing you’re willing to tolerate. Many owners report that wider 35x12.50 tires can contact the crash bars or suspension components when turning sharply or when the suspension compresses off-road. To address this, some drivers remove the crash bars, choose slightly narrower tires, or install wheels with a more favorable offset to push the tire outward.
Another factor to consider is that larger tires add weight and slightly change the vehicle’s gearing and speedometer accuracy. While this doesn’t prevent the upgrade, it’s something many owners correct using a speedometer recalibration tool after installing bigger tires.
For most non-Sasquatch Bronco owners who want a noticeable improvement without creating clearance issues, 33-inch tires offer the best balance of fitment, performance, and simplicity.
What Tire Size Fits on a Stock Sasquatch Bronco?
The situation is different for Broncos equipped with the Sasquatch package, because these vehicles already come factory-equipped with 35-inch tires. Ford designed the Sasquatch setup with wider fender flares, different wheel offset, and suspension tuning that provides the additional clearance needed for larger tires.
Because of this factory configuration, running 35-inch tires on a Sasquatch Bronco requires no modification at all—that size is exactly what the vehicle was engineered for. Many owners simply replace the stock tires with different all-terrain or mud-terrain models in the same size.
The next step up for many Sasquatch owners is 37-inch tires. While this upgrade is common in the Bronco community, it usually moves beyond the “no-modification” category. Larger tires can create clearance issues during steering and suspension compression, particularly during off-road articulation. For this reason, many 37-inch builds include a 2–3 inch lift kit, different wheel offset, or minor trimming to ensure the tires don’t rub.
Another consideration when installing larger tires on a Sasquatch Bronco is the rear-mounted spare tire. Heavier wheels and tires can place additional stress on the tailgate, which is why some owners install a tailgate reinforcement kit when upgrading beyond the factory 35-inch setup.
In practical terms, a stock Sasquatch Bronco already sits in a very capable range for off-road driving. For many owners, simply upgrading to a different 35-inch all-terrain tire provides the performance improvements they’re looking for without needing additional suspension modifications.
6. Do You Need a Lift for 35s or 37s?
One of the most common questions Bronco owners ask is whether larger tires require a suspension lift. The answer depends on tire size, trim level, and how much clearance you want during real off-road driving.
For most non-Sasquatch Broncos, running 35-inch tires without a lift is sometimes possible, but it often requires careful wheel selection or small adjustments such as crash bar removal. Even when 35s technically fit, some setups may experience rubbing when turning sharply or when the suspension compresses off-road. Because of this, many owners install a small leveling kit or mild lift to create extra clearance and avoid contact with suspension components.
Broncos equipped with the Sasquatch package already come with 35-inch tires from the factory, so running this size is completely normal and requires no suspension changes. However, moving beyond that size introduces new challenges.
Once you move up to 37-inch tires, the conversation changes. Tires this large usually require a 2–3 inch lift along with careful attention to wheel offset and suspension clearance. Without additional lift or modifications, 37s are much more likely to rub during steering or when the suspension compresses on uneven terrain.
It’s also important to remember that tire upgrades affect more than just clearance. Larger tires can influence acceleration, braking performance, fuel economy, and speedometer accuracy. Many owners choose to recalibrate the vehicle’s computer after increasing tire size to keep speed and mileage readings accurate.
In short, 35s may work without a lift depending on the setup, but 37s typically require suspension upgrades if you want reliable clearance and proper performance.
Our Top Pick: ROUGH COUNTRY Lift Kit for Bronco
Rough Country 1.5" Lift Kit for Ford Bronco Sport is a suspension lift kit designed for the 2021–2024 Ford Bronco Sport 4WD that raises and levels the vehicle by approximately 1.5 inches to improve ground clearance and stance, making room for larger, more aggressive tires. It’s a bolt-on upgrade aimed at giving the Bronco Sport a more rugged look and better off-road capability while maintaining everyday driveability, and is backed by Rough Country’s lifetime replacement warranty.
7. Wheel Offset, Tire Width, and Why They Matter
When people talk about tire fitment on a Ford Bronco, they often focus only on tire diameter. In reality, two other factors are just as important: wheel offset and tire width.
Wheel offset describes how far the wheel sits inward or outward relative to the vehicle’s suspension. A higher positive offset places the wheel farther inside the wheel well, closer to suspension components like the upper control arms. A lower offset pushes the wheel outward, which can create more clearance for wider tires.
This is one reason the Sasquatch package handles larger tires more easily. Sasquatch wheels use a lower offset than many standard Bronco wheels, which moves the tire slightly outward and provides additional clearance from suspension components.
Tire width also plays a major role. A 35x12.50 tire, for example, is significantly wider than a narrower 35-inch tire. Wider tires are more likely to contact suspension parts or fender liners when steering, especially if the wheels have a high positive offset.
These factors explain why two Broncos with the same tire diameter can have very different results. One vehicle might run 35-inch tires comfortably, while another experiences rubbing simply because the wheels sit farther inward.
When planning a tire upgrade, it’s important to think about the complete setup—tire diameter, tire width, wheel offset, and suspension clearance all work together. Choosing the right combination helps prevent rubbing and ensures the Bronco performs properly both on the road and on the trail.
8. Common Problems When Upsizing Bronco Tires (and How to Fix Them)
Upgrading to larger tires is one of the most popular modifications for the Ford Bronco. Bigger tires improve ground clearance, traction, and overall trail capability. However, increasing tire size can also introduce a few side effects if the rest of the vehicle setup isn’t adjusted accordingly.
Most of these issues aren’t serious, but they’re worth understanding before installing 35-inch or 37-inch tires. The good news is that nearly all of them can be minimized or avoided with the right supporting upgrades.
Below are the most common problems Bronco owners encounter when moving to larger tires, along with practical ways to solve them.
Problem 1: Tire Rubbing When Turning or Off-Road
Why it happens
Rubbing occurs when the tire makes contact with parts of the vehicle during steering or suspension movement. On the Bronco, the most common contact points are the crash bars, upper control arms, and inner fender liners. This issue is most likely when installing 35-inch tires on a non-Sasquatch Bronco or when using wide tires with factory wheels that have a high positive offset.
Even if a larger tire fits while the vehicle is parked, rubbing may still occur when the suspension compresses off-road or when turning at full steering lock.
Possible solutions
Several adjustments can reduce or eliminate rubbing:
-
Choosing wheels with a lower offset to move the tire slightly outward
-
Running slightly narrower tires (for example, a narrower 35 instead of a 35x12.50)
-
Removing or modifying the Bronco’s crash bars
-
Installing a leveling kit or small suspension lift to increase clearance
Supporting products
A modest leveling kit or lift is one of the simplest ways to create additional space for larger tires. Many Bronco owners install a 1–2 inch leveling kit to comfortably run 35-inch tires without rubbing during suspension travel.
Our Top Pick: MZS Leveling Kit for Bronco
This MZS Leveling Lift Kit for 2021–2025 Ford Bronco 4WD is a front suspension spacer kit that uses upper and lower strut spacers to raise the front of the vehicle by about 2 inches, helping level the stance, increase ground clearance and improve the look when running larger tires. It’s designed as a bolt-on upgrade that maintains factory ride quality while adding a modest lift for better off-road clearance and a more balanced front-to-rear height.
Problem 2: Incorrect Speedometer and Odometer Readings
Why it happens
The Bronco’s computer calculates speed and distance based on the factory tire diameter. When larger tires are installed, each wheel rotation travels a longer distance than expected. As a result, the speedometer and odometer can become inaccurate.
For example, when the speedometer reads 60 mph, the vehicle may actually be traveling slightly faster depending on how much larger the tires are compared to stock.
Possible solutions
The most reliable fix is recalibrating the vehicle’s computer to account for the new tire diameter. This process updates the speedometer and odometer calculations so they reflect the correct speed and distance.
Supporting products
Ford and aftermarket manufacturers offer calibration tools and tuners that allow owners to adjust the tire size setting in the vehicle’s system. These tools restore accurate speed readings and ensure that driver-assist features continue to work properly.
Our Top Pick: ROUGH COUNTRY Speedometer CalibratorR
The Rough Country Speedometer Calibrator (90015) is a plug-and-play module designed to correct speedometer readings after installing larger tires on vehicles like the Ford Bronco or F-150. It connects directly to the vehicle’s diagnostic port and quickly recalibrates the speedometer for accurate speed and mileage. The device also updates ECM shift points and electronic stability control to work properly with the new tire size. It can return the vehicle to stock settings if needed.
Problem 3: Reduced Acceleration and Fuel Economy
Why it happens
Larger tires are heavier and require more torque to rotate. This added rotational weight can make the Bronco feel slightly slower during acceleration and may also reduce fuel economy.
The effect becomes more noticeable when jumping from factory tires to very large sizes like 35-inch or 37-inch tires, especially when combined with heavy aftermarket wheels.
Possible solutions
While some performance loss is normal with larger tires, it can be minimized by:
-
Choosing lighter all-terrain tires rather than extremely heavy mud-terrain models
-
Avoiding unnecessarily wide tire sizes
-
Maintaining proper tire pressure and alignment
Supporting products
Many modern all-terrain tires are designed to balance durability with reasonable weight, making them a good choice for daily-driven Broncos that still see trail use.
Our Top Pick: BFGoodrich ALL-TERRAIN tires for Bronco
The BFGoodrich All‑Terrain T/A KO2 33x12.50R15 Tire is an all-terrain tire designed for light trucks, SUVs, and off-road vehicles that delivers strong traction on dirt, mud, rocks, and snow while remaining stable on paved roads. It features an aggressive tread pattern with mud-clearing channels and stone ejectors to maintain grip on loose surfaces. The tire includes reinforced sidewalls and durable rubber compounds for improved resistance to cuts, punctures, and off-road damage. In this size, it offers a 33-inch diameter, 15/32" tread depth, load index 108 (about 2,205 lb per tire), and a 50,000-mile warranty, making it a popular upgrade for lifted trucks and trail vehicles.
Problem 4: Stress on the Rear Tailgate From the Spare Tire
Why it happens
Unlike some SUVs, the Bronco mounts its spare tire directly on the rear tailgate. Larger tires and heavier wheels increase the load placed on the tailgate hinges and mounting structure.
Factory Sasquatch Broncos already carry a 35-inch spare, but aftermarket wheel and tire combinations can sometimes weigh significantly more than the stock setup.
Possible solutions
To reduce long-term stress on the tailgate, many owners install a tailgate reinforcement kit. These kits strengthen the spare tire mounting structure and help support heavier wheel and tire combinations.
Supporting products
A Bronco tailgate reinforcement kit can add extra support for larger spare tires, helping maintain alignment and reduce strain on the hinges over time.
Our Top Pick: ROUGH COUNTRY spare tire reinforcement bracket
The Rough Country reinforcement bracket is a heavy-duty, bolt-on steel plate designed to strengthen the swing-out tailgate on full-size vehicles like the Ford Bronco. It helps spread the weight of a larger or aftermarket spare tire across both hinges and mounting points to reduce stress and wear on the factory tailgate hinge/latch setup, allowing installation of bigger tires without overloading the stock components. The bracket installs without drilling and is intended to boost durability for off-road use and heavier wheel/tire combinations.
Problem 5: Suspension Compression and Clearance Issues
Why it happens
As tire size increases, the available clearance inside the wheel well decreases. During aggressive off-road driving—such as climbing rocks or crossing uneven terrain—the suspension compresses and the tires move upward into the wheel well.
If clearance is limited, the tire may contact the fender liner or other components.
Possible solutions
Improving suspension clearance is the most effective way to avoid this issue. This can be achieved by installing:
-
a small suspension lift
-
upgraded shocks or springs
-
slightly different wheel offset
These upgrades provide additional room for tire movement during suspension travel.
Supporting products
In addition to leveling kist, for drivers planning to run 35-inch tires or frequently drive off-road, upgraded shocks can help maintain a smoother ride while also improving traction and suspension control when the vehicle encounters rocks, ruts, or washboard roads.
Our Top Pick: GABRIEL Shock Absorber for Bronco
This is a spring-assist load carrier shock absorber that combines a traditional shock damper with integrated coil springs designed to help maintain ride height and improve stability when a vehicle is carrying heavier loads. It has a collapsed length of about 13.88 inches and an extended length of about 22.99 inches, with both upper and lower eyelet mount types for installation. The variable-rate rear coil springs are engineered to support around 500 lb per pair of load without exceeding the vehicle’s gross weight rating, while the unit’s super-finished chromed piston rod and leak-proof piston seal enhance corrosion resistance and durability. The design uses Drawn-Over-Mandrel (DOM) tubing to reduce internal wear and extend service life.
Final Thoughts on Tire Upgrade Problems
Most issues that appear after installing larger tires aren’t caused by the tires themselves—they usually result from a mismatch between tire size, wheel setup, and suspension clearance.
By choosing the right combination of tire size, wheel offset, and supporting upgrades, many Bronco owners can run 33-inch or 35-inch tires with minimal complications. With proper planning, even larger setups can work reliably while maintaining the Bronco’s performance both on the road and on the trail.
Frequently Asked Questions About Ford Bronco Tire Sizes
For most non-Sasquatch Broncos, 33-inch tires are the safest size without modifications. Some owners run 35-inch tires, but this may require adjustments such as different wheel offset, narrower tires, or crash bar removal to prevent rubbing during steering or suspension compression.
Yes, many non-Sasquatch Broncos can run 35-inch tires, but the setup needs to be chosen carefully. Tire width, wheel offset, and suspension travel all affect clearance. Some owners install a small leveling kit or remove crash bars to reduce the chance of rubbing.
A lift is not always required for 35-inch tires, especially if the Bronco has the Sasquatch package. However, installing a small leveling kit or mild suspension lift can help improve clearance and prevent rubbing during off-road driving.
In most cases, 37-inch tires require a suspension lift and additional modifications. Without extra clearance, 37s are likely to rub when turning or when the suspension compresses on uneven terrain.
The Sasquatch package is a factory off-road upgrade that includes 35-inch tires, wider fender flares, beadlock-capable wheels, upgraded suspension, and locking differentials. These features allow Sasquatch Broncos to handle larger tires and tougher off-road conditions.
Rubbing happens when the tire contacts parts of the vehicle during steering or suspension movement. On the Bronco, the most common areas are crash bars, upper control arms, and inner fender liners, especially when installing wider tires.
Yes, wheel offset plays a major role in tire clearance. Wheels with higher positive offset sit farther inside the wheel well, which can increase the chance of rubbing. Lower offset wheels move the tire outward and often provide more clearance for larger tires.
Yes, installing larger tires can make the speedometer and odometer read incorrectly because the vehicle’s computer is calibrated for the factory tire size. Many owners recalibrate the system after upgrading tires to maintain accurate readings.
Larger tires are heavier and require more energy to rotate, which can slightly reduce fuel economy and acceleration. The impact depends on the tire size, weight, and driving conditions.
Broncos equipped with the Sasquatch package already carry a 35-inch spare tire from the factory. However, heavier aftermarket wheel and tire combinations can place additional stress on the tailgate, so some owners install a tailgate reinforcement kit for extra support.
Conclusion
Upgrading tire size is one of the most effective ways to improve the capability and appearance of a Ford Bronco. Larger tires can provide better traction, increased ground clearance, and a more aggressive stance on and off the trail. However, tire upgrades also introduce important considerations such as suspension clearance, wheel offset, and the potential for rubbing.
For most Broncos, 33-inch tires offer a simple upgrade with minimal complications, while 35-inch tires are a popular next step for improved off-road performance. Moving up to 37-inch tires typically requires suspension modifications and careful planning to ensure proper clearance and vehicle performance.
The key to a successful upgrade is choosing a setup that matches your Bronco’s trim level and how you actually use the vehicle. By understanding factors like wheel offset, suspension travel, and supporting modifications, you can confidently select a tire size that improves performance without creating unnecessary problems.
If you’re planning additional upgrades beyond tires, be sure to check out our full guide to the best Ford Bronco accessories, where we cover recovery gear, roof racks, suspension upgrades, and other modifications that help you build a capable and reliable Bronco setup.
