Most Broncos use tires between about 30 and 35 inches, with 16–18 inch wheels; Sasquatch models get 35×12.5R17.
I’ve spent years working with off-road vehicles and tire fitment, and I’ll walk you through exactly what tire sizes are used on the Ford Bronco, why those sizes matter, and how to pick the right tire for your trim and driving style. This guide explains factory sizes, common aftermarket upgrades, fitment rules, load and speed ratings, and real-world tips so you can choose tires that match performance, clearance, and comfort.
Why tire size matters for the Ford Bronco
What tire sizes are used on the Ford Bronco? The choice affects ground clearance, traction, fuel economy, and speedometer accuracy. Tires also change handling and gear load on the drivetrain.
Brief definitions to keep things clear:
- Tire section width: the number in millimeters (for example 255).
- Aspect ratio: sidewall height as a percent of width (for example 70).
- Wheel diameter: the rim size in inches (for example 17).
- Overall diameter: the tire’s actual height in inches or mm.
Why this is important:
- Bigger tires raise the vehicle and help off-road clearance.
- Larger diameter changes speedometer readout and engine load.
- Wider tires affect turning clearance and wheel well rub.
What tire sizes are used on the Ford Bronco? They range broadly. Stock Bronco tires are chosen to balance on-road comfort with off-road ability. When you change size, check brakes, fenders, and gearing.
Common OEM and factory tire sizes by trim
What tire sizes are used on the Ford Bronco? Factory size depends on trim and optional packages. Wheel diameters typically run 16 to 18 inches. Overall tire diameters commonly fall between 30 inches and 35 inches.
Examples and typical factory options:
- Base trims and lower trims
- 16-inch or 17-inch wheels with tires near 30–32 inches overall.
- Common P-metric examples: 255/70R17 (about 31.6 inches).
- Mid-level trims
- 17- or 18-inch wheels with 32–33 inch tires.
- Example: 265/70R17 (about 32.6 inches).
- Sasquatch package (off-road focused)
- 17×8-inch beadlock-capable wheels with 35×12.5R17 tires (about 35 inches).
- This is a factory-fit 35-inch tire on many Sasquatch Bronco builds.
A note on tire labeling:
- A 35×12.5R17 is an LT or “inch” style tire size. It means 35 inches tall, 12.5 inches wide, fits a 17-inch wheel.
- A 265/70R17 is metric and converts to roughly 32.6 inches tall and 10.4 inches wide.
What tire sizes are used on the Ford Bronco? Expect stock sizes clustered in these ranges, with the Sasquatch at the top end.
Aftermarket and upgrade options: 33s vs 35s and what to expect
What tire sizes are used on the Ford Bronco when owners modify them? Most owners move to 33-inch or 35-inch tires for better off-road ability.
Common upgrade paths:
- 33-inch tires
- Minimal trimming or suspension lift often required.
- Good balance for daily driving and light trail use.
- 35-inch tires
- Often need Sasquatch package or a 2–2.5 inch lift on non-Sasquatch Broncos.
- May require wheel backspacing changes and speedometer recalibration.
Trade-offs to consider:
- Fuel economy drops as tire size and weight rise.
- Acceleration and towing capacity decline unless you regear.
- Larger tires can increase brake wear.
What tire sizes are used on the Ford Bronco in aftermarket setups? Mostly 33 and 35 inches, with 35-inch tires being the most popular for serious off-road use.
Fitment basics: wheels, backspacing, and clearance
What tire sizes are used on the Ford Bronco depends on correct wheel fitment. Wheel width, offset, and backspacing determine whether a tire will rub.
Key fitment rules:
- Match wheel width to tire width range recommended by the tire maker.
- Lower offset (more negative) pushes tires out; higher offset tucks them in.
- Check fender liners, sway bars, and shock clearance at full bump and full turn.
Practical checklist before buying:
- Measure current wheel well clearance at full suspension compression.
- Compare rolling diameter to stock diameter; stay within 3–5% for no regear.
- Verify brake caliper clearance to the wheel.
What tire sizes are used on the Ford Bronco? Even if a large size “looks right,” always confirm clearance for turns and bumps.
Load index, speed rating, and LT vs P-metric tires
What tire sizes are used on the Ford Bronco? You’ll find both LT (light truck) and P-metric styles used. Choose the right type for load and use.
Important points:
- LT tires have higher load capacity and stiffer sidewalls. They are common on heavy off-road builds and towing setups.
- P-metric tires are tuned for ride comfort and lower noise on pavement.
- Check load index to match vehicle weight and expected cargo/towing loads.
- Speed rating affects heat build-up, especially with heavier tires at highway speeds.
Practical tip:
- If you add heavier tires, verify that each tire’s load index covers gross vehicle weight plus gear.
What tire sizes are used on the Ford Bronco? Both LT and P-metric are used. Pick based on load needs and ride preference.
Real-world tips and lessons from experience
What tire sizes are used on the Ford Bronco? From my experience working with Broncos, here are tips I wish I’d known earlier.
Lessons learned:
- If you want 35s, buy the Sasquatch trim or budget for a lift and regear. I fitted 35s to a non-Sasquatch and needed a 2.5-inch lift and 4.30 gears for good drivability.
- Air down on trails. Lower pressure improves traction. Reinflate for highway driving for better MPG and handling.
- Check tire weight. Heavy tires add unsprung mass and affect suspension feel. I swapped to lighter side-wall tires for a smoother ride on-road.
Recommended steps before upgrading:
- Confirm wheel bolt pattern and hub bore.
- Pick a reputable tire with good sidewall durability for off-road.
- Consider professional mounting and balancing for large tires.
What tire sizes are used on the Ford Bronco? Owners who plan upgrades should plan holistically: suspension, gears, and brakes.
Common search questions (PAA-style)
What tire sizes are used on the Ford Bronco? Here are quick answers to common quick-search queries.
What size tire does a Bronco Sasquatch use?
Most Sasquatch-equipped Broncos come with 35×12.5R17 tires as factory fitment for robust off-road performance.
Can I fit 35-inch tires without a lift?
Fitting 35-inch tires to a stock Bronco often requires trimming and sometimes a mild lift; the Sasquatch package typically supports 35s without extra lift.
Will bigger tires affect my speedometer?
Yes. Larger tires change rolling circumference and will cause the speedometer to under-read unless recalibrated.
Frequently Asked Questions of What tire sizes are used on the Ford Bronco?
What tire sizes are used on the Ford Bronco for base models?
Base models typically use tires with overall diameters around 30–32 inches on 16–17 inch wheels. Exact sizes vary by trim and wheel option.
Do all Broncos come with 35-inch tires?
No. Only Broncos with the Sasquatch package or specific off-road options come from the factory with 35-inch tires. Other trims use smaller factory sizes.
Can I put 35-inch tires on a stock Bronco without modifications?
You can in some cases, but many stock Broncos will need minor trimming, a lift, or both to avoid rubbing during suspension compression and turns.
How does tire size affect fuel economy on the Bronco?
Larger and heavier tires increase rolling resistance and weight, which generally reduces fuel economy and can lower acceleration.
Should I choose LT or P-metric tires for my Bronco?
Choose LT tires for heavy loads, towing, and heavy-duty off-road use. Choose P-metric tires for a quieter, more comfortable on-road ride.
Conclusion
This guide answered What tire sizes are used on the Ford Bronco and explained how those sizes affect fit, performance, and safety. Stock Broncos commonly use 16–18 inch wheels with tires in the 30–33 inch range, while the Sasquatch package uses 35×12.5R17 tires. If you plan to change sizes, check clearance, load rating, and gearing before you buy. Take action: measure your wheel wells, pick a tire type that suits your driving, and consult a tire pro if you plan big changes. Share your setup or questions below, and subscribe or comment to learn more about Bronco tire fitment and upgrades.
