1999 Ford Explorer Tire Size – The Ultimate Guide For Owners

The standard factory-recommended tire size for a 1999 Ford Explorer is typically 235/75R15 or 255/70R16, depending on your specific trim level and wheel package. Choosing the right rubber ensures your vehicle maintains proper speedometer calibration, optimal fuel efficiency, and safe handling characteristics on both pavement and trails.

You probably bought your Ford Explorer because you value versatility. Whether you are daily driving through city traffic or heading out for a weekend camping trip, your tires are the single most important connection between your SUV and the road.

Finding the right 1999 ford explorer tire size can feel overwhelming with so many aftermarket options available. We are here to clear the confusion so you can focus on the drive rather than the technical specs.

In this guide, we will break down exactly what sizes fit your rig, how to read your tire sidewall, and what you need to consider before making the jump to larger, more aggressive off-road tires. Let’s get your Explorer rolling safely and efficiently.

Understanding Your Factory 1999 Ford Explorer Tire Size

Before you start browsing for new rubber, you need to identify what your vehicle came with from the factory. The 1999 Ford Explorer was offered in several trims, including the XL, XLT, Eddie Bauer, and Limited, which often dictates the rim diameter.

Most base models were equipped with 15-inch steel or alloy wheels running 235/75R15 tires. Higher-end trims often featured 16-inch wheels, which typically utilized 255/70R16 tires for a slightly wider, more stable footprint.

To confirm your specific requirements, check the driver-side door jamb sticker. This manufacturer-provided placard is the definitive source for your vehicle’s original equipment (OE) specifications, including tire pressure and size.

Decoding the Sidewall Numbers

Tire sizing follows a standard metric format that tells you everything you need to know about the tire’s dimensions. For example, a 235/75R15 tire provides a wealth of information in just a few digits:

• 235: The section width in millimeters.
• 75: The aspect ratio, meaning the sidewall height is 75% of the width.
• R: Indicates radial construction.
• 15: The diameter of the wheel in inches.

Common Considerations for Upgrading Tires

Many owners want to move up in size to improve the look of their SUV or to gain extra ground clearance for light off-roading. While a larger 1999 ford explorer tire size can improve aesthetics, it comes with several mechanical considerations.

Moving to a significantly larger diameter can cause the tires to rub against the inner fender liners or sway bars during full steering lock. You may also notice a drop in acceleration, as larger tires effectively change your final drive gear ratio, making the engine work harder to get the wheels turning.

The Impact on Speedometer Calibration

Your vehicle’s computer is calibrated for the factory tire diameter. If you install larger tires, your speedometer will read slower than your actual speed, which can lead to unintentional speeding.

In many cases, a professional mechanic can recalibrate the PCM (Powertrain Control Module) or install a signal converter to correct the reading. Always verify your actual speed using a GPS device if you have recently changed your tire configuration.

Choosing the Right Tire Type for Your Use Case

Your choice should be dictated by where you spend most of your time. Installing aggressive mud-terrain tires for a vehicle that stays on the highway is a recipe for a loud, uncomfortable ride and rapid tread wear.

All-Season vs. All-Terrain

For the average daily driver, a quality all-season tire offers the best balance of longevity, fuel economy, and wet-weather performance. These tires feature siping—small slits in the tread—that provide excellent grip on rainy roads.

If your weekends involve fire roads, gravel, or light mud, an all-terrain (A/T) tire is a better choice. They feature deeper tread blocks and stronger sidewalls, providing better puncture resistance when you encounter sharp rocks or branches off the pavement.

Essential Safety Steps When Changing Tires

Replacing tires is a perfect DIY task, but it requires the right tools and a focus on safety. Never attempt to lift your vehicle without proper equipment and a stable surface.

1. Use a quality floor jack: Always lift by the factory-designated jacking points to avoid damaging the frame or body panels.
2. Jack stands are mandatory: Never work under a vehicle supported only by a hydraulic jack.
3. Torque the lug nuts: Use a torque wrench to tighten your lug nuts to the manufacturer’s specification (usually 100 lb-ft for this generation of Explorer).
4. Check your spare: While you are swapping out your main set, ensure your spare tire is inflated to the correct pressure and is in good condition.

Frequently Asked Questions About 1999 Ford Explorer Tire Size

Can I fit 31-inch tires on a stock 1999 Ford Explorer?

You can often fit a 31-inch tire on a stock 1999 Ford Explorer, but you may experience minor rubbing at full steering lock. If you plan on doing serious off-roading, a small suspension leveling kit is highly recommended to prevent fender damage.

What is the benefit of a wider tire?

A wider tire increases the contact patch with the ground, which can provide better traction in soft terrain like sand or mud. However, wider tires are more prone to hydroplaning on wet highways and can slightly decrease your fuel efficiency.

Do I need an alignment after changing tire sizes?

If you change your 1999 ford explorer tire size, it is a smart idea to get an alignment, especially if the new tires have a significantly different profile. An alignment ensures your vehicle tracks straight and prevents premature, uneven wear on your new investment.

Should I replace all four tires at once?

Yes, especially if you have a 4WD or AWD model. Matching the tire diameter across all four corners is critical to prevent binding in the drivetrain and to ensure the transfer case operates correctly.

Selecting the right tires for your 1999 Ford Explorer is a balance of function and preference. By sticking close to the recommended specifications or carefully planning your upgrades, you ensure your vehicle remains a reliable partner for your daily commutes and weekend adventures alike.

Remember to check your tire pressure regularly and keep an eye on your tread depth to maintain maximum safety. Stay safe, stay prepared, and enjoy the ride!