1999 Ford Expedition Wheel Size – The Ultimate Fitment And Upgrade
Finding the correct 1999 ford expedition wheel size is essential for maintaining vehicle safety, handling, and speedometer accuracy. This guide provides factory specifications, bolt patterns, and expert advice for choosing the right rims and tires for your SUV. Whether you are restoring a classic or building an off-roader, we have the technical data you need.
Do you feel a slight vibration in your steering wheel, or are you looking to give your first-generation Expedition a more aggressive stance? Choosing the right wheels is one of the most impactful upgrades you can make, but it is also one where small mistakes lead to big headaches. If you get the offset or bolt pattern wrong, you risk expensive mechanical damage or a dangerous failure on the highway.
Understanding your 1999 ford expedition wheel size is the first step toward a successful DIY project or a professional-grade upgrade. I will walk you through the factory dimensions, the unique bolt pattern requirements, and the critical “mid-year” changes that often trip up even experienced mechanics. By the end of this guide, you will know exactly what fits and why it matters for your Ford’s performance.
We will cover everything from backspacing for off-road clearance to the specific torque specs for your lug nuts. This isn’t just about aesthetics; it is about ensuring your heavy-duty SUV remains stable under load and safe for your family. Let’s dive into the technical details and get your Expedition sitting exactly how it should.
Standard 1999 ford expedition wheel size and Factory Specs
When the 1999 Ford Expedition rolled off the assembly line, it came with two primary wheel diameters depending on the trim level and drivetrain. Most XLT models featured a 16-inch rim, while the more premium Eddie Bauer editions often stepped up to a 17-inch option. Knowing your starting point is vital before you start browsing aftermarket catalogs.
The standard 16-inch wheel usually measured 16×7 inches, while the 17-inch upgrade was typically 17×7.5 inches. These widths are relatively narrow by modern standards, which limits the width of the tire you can safely mount without risking “bead failure.” If you plan on running wider rubber for better traction, you may need to look at aftermarket alloy wheels with an 8-inch or 9-inch width.
The 16-Inch Factory Wheel
The 16×7 inch wheel was the workhorse of the 1999 lineup, designed to provide a comfortable ride with plenty of tire sidewall. This setup is excellent for soaking up bumps on the trail or potholes in the city. The factory tire size for this rim was typically a 255/70R16, which offers a good balance of fuel economy and load capacity.
The 17-Inch Factory Wheel
Stepping up to the 17×7.5 inch wheel provided a slightly more modern look and improved cornering stability due to the shorter tire sidewall. The common tire size here was the 265/70R17. If you are looking for the 1999 ford expedition wheel size that offers the best blend of aesthetics and performance, the 17-inch factory spec is a great benchmark for your search.
Understanding the 5x135mm Bolt Pattern
One of the most important things to know about the 1999 Ford Expedition is its unique bolt pattern. Unlike many other trucks that use common 5-lug or 6-lug patterns, this era of Ford trucks used a 5x135mm bolt pattern. This specific measurement is shared only with the F-150 of the same era (1997-2003) and the Lincoln Navigator.
If you try to buy wheels meant for a Jeep, Chevy, or even a newer Ford F-150, they simply will not fit. The 135mm measurement refers to the diameter of the imaginary circle formed by the centers of the five lug holes. Always double-check that any aftermarket wheel you purchase is explicitly drilled for this 5x135mm configuration to avoid the need for unsafe adapters.
The Hub-Centric Design
The 1999 Expedition uses a hub-centric wheel design, meaning the wheel is centered by the hub bore rather than the lug nuts. The center hole of the wheel must match the hub diameter of the vehicle, which is 87.1mm for this model. If you buy wheels with a larger center bore, you must use hub-centric rings to prevent high-speed vibrations and stud failure.
Lug Nut Thread Pitch Variations
Here is a “pro tip” that catches many DIYers off guard: 1999 was a transition year for Ford’s lug nut threads. Early 1999 models often used 12mm x 1.75 threads, while later production units switched to a beefier 14mm x 2.0 thread. Before ordering new lug nuts, remove one from your front and rear axles to verify the diameter and thread pitch.
Offset and Backspacing for the 1999 Ford Expedition
When you change your 1999 ford expedition wheel size, you must also consider offset and backspacing. These two measurements determine how far the wheel sticks out from the fender or how close it sits to the internal suspension components. Getting this wrong can lead to the tire rubbing against the upper control arm or the frame rail during tight turns.
The factory offset for these wheels is generally around +12mm to +15mm. This “positive offset” keeps the wheel tucked neatly inside the wheel well. If you are looking for a “flush” look or want to move the wheels outward for a wider stance, you might look for an offset closer to 0mm. However, be careful not to go too far into the negative offset range without a lift kit.
Measuring Backspacing
Backspacing is the distance from the mounting surface to the back edge of the wheel. For the 1999 Expedition, a backspacing of 4.5 inches is usually the “sweet spot” for 16 or 17-inch wheels. This provides enough clearance for the brake calipers and steering knuckles while allowing for a slightly wider tire than the factory offered.
The Impact on Scrub Radius
Changing the offset significantly alters your vehicle’s scrub radius. This affects how the steering feels and how the truck tracks on the highway. A massive change in offset can cause the steering wheel to “jerk” when you hit a bump, a phenomenon known as bump steer. Stick as close to factory specs as possible unless you are performing a full suspension overhaul.
Upsizing Your Wheels for Off-Road Use
Many owners want to move away from the stock 1999 ford expedition wheel size to accommodate larger off-road tires. If you are planning to install 33-inch or 35-inch tires, you will likely need to move to an 18-inch or 20-inch rim to find the best tire selections. However, larger wheels come with trade-offs in weight and ride quality.
For a dedicated trail rig, I recommend staying with a 17-inch wheel. This allows for more tire sidewall, which is crucial for airing down your tires on rocky terrain. A 17×8.5 or 17×9 wheel with a 0mm offset is a popular choice for those adding a 2-inch leveling kit or a 4-inch suspension lift.
Clearing 33-Inch Tires
On a stock 1999 Expedition, you can often fit a 285/70R17 (roughly a 33-inch tire) with minimal rubbing on the lower plastic valance. You may need to do some light trimming with a utility knife. To ensure full clearance at full steering lock, a torsion bar adjustment or a small leveling kit is highly recommended.
The Risk of 20-Inch+ Wheels
While 20-inch or 22-inch wheels look great for street use, they significantly increase the unsprung weight of your vehicle. This puts extra strain on your ball joints, tie rod ends, and wheel bearings. If you go this route, ensure you upgrade to high-quality heavy-duty suspension components to handle the added leverage and mass.
Installation Steps and Safety Checks
Installing a new 1999 ford expedition wheel size requires more than just a jack and a lug wrench. Because this is a heavy SUV, safety is paramount. Always perform the installation on a flat, level surface and use high-quality jack stands to support the vehicle’s weight. Never rely on a hydraulic jack alone while you are working near the wheel wells.
- Loosen the lug nuts while the tires are still on the ground.
- Jack up the vehicle and secure it on stands.
- Remove the old wheels and inspect the brake rotors and hub surface for rust.
- Clean the hub mounting surface with a wire brush to ensure a flat mating surface.
- Slide the new wheel onto the studs, ensuring it sits flush against the hub.
- Hand-tighten the lug nuts in a “star pattern” to ensure even pressure.
Once the vehicle is back on the ground, use a calibrated torque wrench to tighten the lug nuts to 100-150 lb-ft, depending on your specific stud size (check your owner’s manual). Re-torque the nuts after the first 50 to 100 miles of driving. Aluminum wheels can “settle,” and the lug nuts may loosen slightly during the initial heat cycles.
Maintaining Your Wheels and Tires
Once you have dialed in your 1999 ford expedition wheel size, regular maintenance will keep them looking and performing like new. Brake dust is the enemy of alloy wheels; it is corrosive and can pit the finish if left sitting for too long. Use a pH-neutral wheel cleaner and a soft brush to clean the rims every time you wash your SUV.
Don’t forget to check your tire pressure monthly. Large SUVs like the Expedition are sensitive to pressure changes, which can affect tire wear and fuel economy. If you have upsized your tires, the “door jamb” pressure sticker may no longer be accurate. You may need to perform a “chalk test” to find the ideal PSI for even tread contact.
Regularly inspect your valve stems for cracks or leaks. If you are heading off-road, consider upgrading to metal bolt-in valve stems. These are much more durable than standard rubber pull-through stems and are less likely to be torn off by a stray branch or rock on the trail.
Frequently Asked Questions About 1999 ford expedition wheel size
What is the exact bolt pattern for a 1999 Ford Expedition?
The bolt pattern is 5x135mm. This is a specific pattern used by Ford in the late 90s and early 2000s and is not compatible with the more common 5×5.5 or 6x135mm patterns found on other trucks.
Can I put 20-inch wheels on my 1999 Expedition?
Yes, you can install 20-inch wheels, provided they have the correct 5x135mm bolt pattern and an appropriate offset (usually between 0mm and +15mm). Be aware that larger wheels will result in a firmer ride and may require speedometer recalibration if the overall tire diameter changes.
What is the largest tire I can fit on factory 17-inch wheels?
On a stock height 1999 Expedition, a 285/70R17 is generally the largest tire you can fit. It may require very minor trimming of the front plastic bumper valance to prevent rubbing when backing up or turning at full lock.
Do I need different lug nuts for aftermarket wheels?
Most likely, yes. Factory Ford lug nuts are usually “large acorn” style designed for OEM wheels. Many aftermarket wheels require “conical” or “tapered” lug nuts with a smaller diameter to fit into the lug holes. Always ensure the seat type of the nut matches the wheel.
How do I know if I have 12mm or 14mm wheel studs?
The easiest way is to check the build date on your driver’s side door sticker. Generally, Expeditions built before November 1999 use M12 studs, while those built after use M14. However, the safest method is to use a thread pitch gauge or try threading a known nut onto the stud.
Final Thoughts on Choosing the Right Wheels
Upgrading your 1999 ford expedition wheel size is a fantastic way to personalize your vehicle while improving its utility. Whether you are sticking to the classic 16-inch look for a smooth highway ride or jumping to 17-inch rims for better tire options, the key is precision. Pay close attention to the bolt pattern, hub bore, and that tricky lug nut thread change.
By following the specifications and safety steps outlined in this guide, you can avoid the common pitfalls that lead to vibration, rubbing, or mechanical failure. A well-chosen set of wheels doesn’t just make your Expedition look better; it makes it a more capable and reliable companion for your daily commute or your next off-road adventure.
Take your time, measure twice, and always prioritize quality components. Your Ford Expedition was built to last, and with the right set of wheels, it will continue to serve you well for years to come. Stay safe and stay comfortable!
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