The 2009 Ford Trucks F-150 FX4 came from an era when the F-150 had fully settled into its role as a daily-use pickup that also needed to look right on tougher off-road-oriented trims. FX4 buyers often care as much about stance and wheel package as they do basic replacement size. This exact model uses radial tires in two primary sizes, 275/55R20 and 275/65R18, so the first step is confirming which wheel diameter is on the truck. That choice also shapes the look of the truck, especially since the available 18-inch option carries a raised white letter all-terrain presentation. For replacement, appearance, wheel fit, and intended use all matter more than treating both sizes as interchangeable.
Which Tire Size Is Right for The 2009 Ford Trucks F-150 FX4
The 2009 Ford Trucks F-150 FX4 uses two primary tire sizes, and the difference comes down to wheel diameter rather than a change in basic tire construction. Both sizes are radial, but one fits an 18-inch wheel and the other fits a 20-inch wheel, so identifying the actual wheel package on the truck is the first and most important step before comparing tire choices.
A 275/55R20 tire uses a 275-millimeter nominal section width, a 55-series aspect ratio, radial construction, and a 20-inch rim diameter. On a 2009 Ford Trucks F-150 FX4, this size supports a more modern large-wheel fitment look while staying within the truck's primary radial sizing. The key point with this size is confirming that the truck actually has 20-inch wheels, since it sits very close in overall diameter to the 18-inch alternative but does not use the same rim. It is the right size to evaluate when the truck retains its 20-inch wheel setup and the goal is to stay with that factory-style wheel diameter.
A 275/65R18 tire also uses a 275-millimeter nominal section width and radial construction, but its taller 65-series profile is built for an 18-inch rim. For the 2009 Ford Trucks F-150 FX4, this size keeps nearly the same overall tire diameter as the 20-inch option while pairing with a different wheel package. Available choices in this size include BFGoodrich and the All Terrain TA KO2 series with a raised white letter sidewall, giving it a distinctly truck-oriented appearance. It is the size to focus on when the truck has 18-inch wheels and the owner wants an all-terrain-style replacement with the correct rim diameter.
Fitment is straightforward here because the covered FX4 sub-model shares the same two tire sizes as the model core. The main thing to verify is not trim level, but whether the truck is riding on 18-inch or 20-inch wheels before choosing a replacement tire.
1
2009 Ford Trucks F-150 FX4 Base
The 2009 Ford Trucks F-150 FX4 Base uses the same two radial tire sizes found on this model line, with fitment determined by wheel diameter. Tire selection comes down to confirming whether the truck has 18-inch or 20-inch wheels and then choosing the tread style and appearance that suit how the truck is actually used.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2009 Ford Trucks F-150 FX4 Tires for Sale
Current product coverage for the 2009 Ford Trucks F-150 FX4 centers on the 275/65R18 size, including BFGoodrich in the All Terrain TA KO2 series. That gives buyers an 18-inch radial option with a raised white letter sidewall, truck-oriented construction, and a defined rim-width range to compare.
Owners of a 2009 Ford Trucks F-150 FX4 usually need to sort out wheel diameter first, then compare tire size, sidewall style, and intended use. These FAQs focus on 18-inch versus 20-inch fitment, product selection, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2009 Ford Trucks F-150 FX4?
The 2009 Ford Trucks F-150 FX4 uses two primary tire sizes: 275/55R20 and 275/65R18. Both are radial sizes, and both apply to the FX4 Base, so the correct choice depends on which wheel diameter is actually on the truck rather than on a change in model designation.
A truck with 20-inch wheels needs the 275/55R20 size, while a truck with 18-inch wheels needs the 275/65R18 size. Since these sizes use different rims, checking the wheel before ordering matters more than comparing the close overall tire dimensions. Any aftermarket wheel change should also be verified before selecting a replacement tire.
What size rim does a 2009 Ford Trucks F-150 FX4 use?
A 2009 Ford Trucks F-150 FX4 uses either an 18-inch or 20-inch rim, depending on which of its two primary tire sizes is on the truck. The 275/65R18 fits an 18-inch wheel, and the 275/55R20 fits a 20-inch wheel.
That makes wheel confirmation the first fitment check, especially on a used truck where wheels may have been changed over time. Looking only at the tread or overall tire height is not enough, because both sizes are similar in outside diameter but mount to different rims. Checking the stamped wheel size or the full tire sidewall marking is the safest starting point.
Do all 2009 Ford Trucks F-150 FX4 sub-models use the same tire size?
The covered sub-model, 2009 Ford Trucks F-150 FX4 Base, uses the same two tire sizes as the model core: 275/55R20 and 275/65R18. Both are radial fitments, so the variation is tied to wheel diameter rather than to a different construction type.
That means the sub-model name alone does not settle the tire choice. The practical step is confirming whether the truck is on 18-inch or 20-inch wheels, then matching the replacement tire to that wheel size. If the truck has been modified with different wheels or suspension parts, clearance and wheel-width compatibility should be checked before moving ahead.
Choosing the Right Tire
What should I consider when choosing a 275/65R18 tire for a 2009 Ford Trucks F-150 FX4?
Start with the basics: correct size, radial construction, and wheel compatibility. For the 2009 Ford Trucks F-150 FX4, the available 275/65R18 option includes the BFGoodrich All Terrain TA KO2, with a raised white letter sidewall, a 7.5 to 9.5 inch rim-width range, and a maximum load rating of 3,415 pounds at 80 psi.
After confirming the size, think about how the truck is used and how you want it to look. An all-terrain tire with raised white letters gives the FX4 a more traditional truck presentation than a plain black sidewall highway-style tire would. Wheel width, load needs, and whether the truck sees pavement-only or mixed-use driving should shape the final decision.
What sidewall styles are available for 2009 Ford Trucks F-150 FX4 tires?
The available sidewall style shown for this fitment is RWL, which stands for raised white letter. That sidewall treatment appears on the 275/65R18 BFGoodrich All Terrain TA KO2 and gives the tire a more pronounced truck and off-road visual character than a plain black sidewall.
Sidewall style affects appearance first, but it can also influence how closely the tire matches the truck's intended personality. On an FX4, raised white letters often suit a more rugged presentation. The main fitment point still comes first, though: sidewall style should be considered only after confirming whether the truck uses the 18-inch or 20-inch wheel package.
What brands offer tires for the 2009 Ford Trucks F-150 FX4?
BFGoodrich is represented in the current product selection for the 2009 Ford Trucks F-150 FX4, specifically in the 275/65R18 size. The available tire is part of the All Terrain TA KO2 series, which places the emphasis on a truck-oriented radial choice rather than a broad mix of passenger-style replacements.
Brand comparison matters most after the fitment basics are settled. On this truck, the more immediate question is whether the wheel package calls for 275/65R18 or 275/55R20, because no brand choice can overcome a rim-diameter mismatch. Once the wheel size is confirmed, then it makes sense to compare tread character, sidewall appearance, and rim-width suitability.
Restoration & Appearance
Which tire should I choose for a period-style 2009 Ford Trucks F-150 FX4?
A period-style choice for a 2009 Ford Trucks F-150 FX4 starts with keeping the truck on its proper wheel diameter, either 275/55R20 or 275/65R18. Since this is a modern truck-era fitment with radial construction, the visual character comes more from wheel size, profile, tread style, and sidewall treatment than from a bias-ply versus radial decision.
For an owner who wants a more truck-oriented look, the 275/65R18 BFGoodrich All Terrain TA KO2 with raised white letters offers a strong match to the FX4 personality. Exact originality questions should still be checked against vehicle-specific references if the goal is strict restoration detail, especially on a truck that may have had wheels changed during its life.
Does correct tire fitment matter for a 2009 Ford Trucks F-150 FX4 restoration?
Correct tire fitment matters because the 2009 Ford Trucks F-150 FX4 used two distinct wheel-and-tire combinations, not one catch-all size. Staying with the proper 18-inch or 20-inch fitment preserves the truck's proportions more accurately than treating any similar-diameter modern tire as close enough.
Appearance is only part of the story. Correct fitment also helps maintain proper wheel seating, clearance, and load suitability for a pickup. On a restoration-minded truck, confirm the actual wheel size first, then compare sidewall treatment and tire character so the finished result looks consistent with the way the FX4 was equipped and intended to be used.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Ford Trucks F-150 FX4?
Yes. Modifications such as aftermarket wheels, wheel spacers, suspension lifts, leveling kits, lowering changes, or body alterations can affect tire fitment on a 2009 Ford Trucks F-150 FX4 even when the sidewall still shows one of the original sizes. The truck's two primary sizes already use different rim diameters, so changes to the wheel package deserve extra attention.
A modified truck should be checked for wheel width, offset, steering clearance, and fender space before choosing replacement tires. Even small setup changes can alter how a 275/55R20 or 275/65R18 sits in the wheel opening. Verifying the actual wheel dimensions on the truck is a more reliable step than assuming the current tire size tells the whole story.
What should I inspect before driving a 2009 Ford Trucks F-150 FX4 on new tires?
Before road use, inspect the wheel condition, verify the tire size matches the rim diameter, and confirm there is no interference at full steering lock or suspension travel. On the tire itself, check inflation, bead seating, sidewall condition, and any visible shipping or mounting damage before putting miles on the truck.
A pickup like the 2009 Ford Trucks F-150 FX4 also benefits from a quick review of overall readiness, including alignment feel, lug torque, and even tread contact across the axle. Trucks that sit for long periods or alternate between street and utility use should be watched closely during the first drives so any vibration, rubbing, or air-loss issue is caught early.
How often should tires on a 2009 Ford Trucks F-150 FX4 be inspected?
Tires on a 2009 Ford Trucks F-150 FX4 should be inspected regularly, not just when tread looks low. A monthly visual check is a sensible routine for pressure, cuts, punctures, sidewall cracking, and uneven wear, and an additional inspection before longer trips or towing use adds a useful margin of caution.
Low-mileage trucks can be especially deceptive because aging and air loss may show up long before the tread is worn out. It also helps to inspect after off-road use, curb impacts, or seasonal storage. Catching changes in wear pattern early can point to alignment, suspension, or wheel issues before they create larger fitment or drivability problems.
