The 2009 Ford Trucks F-150 STX sits in the twelfth-generation F-150 lineup, a period when Ford’s full-size pickup balanced everyday work use with a broader range of wheel and tire packages. On an STX, tire selection is less about vintage-style construction and more about matching the truck’s exact drivetrain and wheel setup. This model uses modern radial tire sizes, with different fitments tied to 4x2 and 4x4 configurations and to either 17-inch or 18-inch rims. Available choices here lean toward BFGoodrich All-Terrain T/A KO2 tires with raised white letter styling. The key is confirming the truck’s sub-model and wheel diameter before comparing size, load, and appearance details.
Which Tire Size Is Right for The 2009 Ford Trucks F-150 STX
The 2009 Ford Trucks F-150 STX uses four primary tire sizes, and the correct one depends first on whether the truck is a 4x2 or 4x4 and whether it has 17-inch or 18-inch wheels. Because both sub-model and rim diameter affect fitment, the first step is confirming the exact STX configuration already on the truck before choosing a tire.
255/65R17 is a metric radial size in which 255 identifies the section width in millimeters, 65 is the aspect ratio, R marks radial construction, and 17 is the wheel diameter in inches. On the 2009 Ford Trucks F-150 STX, this size is one of the 17-inch radial fitments and is associated with the 4x2 configuration. Available choices in this size include a BFGoodrich All-Terrain T/A KO2 with raised white letter styling. This size is the right one to evaluate when the truck is an STX 4x2 already equipped with 17-inch wheels.
265/60R18 is a metric radial size that uses a 265 millimeter section width, a 60-series profile, and an 18-inch rim diameter. For the 2009 Ford Trucks F-150 STX, this size belongs to the 4x2 fitment group and should be matched to an actual 18-inch wheel before any tire is selected. Its lower profile relative to the 17-inch 4x2 option makes wheel confirmation especially important on trucks that may have had wheel changes over time. This is the size to pursue when an STX 4x2 is running the factory-style 18-inch fitment.
255/70R17 is a metric radial tire size with a 255 millimeter nominal width, a 70-series aspect ratio, and a 17-inch wheel diameter. On the 2009 Ford Trucks F-150 STX, this size is tied to the 4x4 configuration rather than the 4x2 setup, so drivetrain identification matters before ordering a replacement. The taller profile within the 17-inch group also means it should not be confused with the 255/65R17 used elsewhere in the STX range. This size should be considered when the truck is a 4x4 and still uses its 17-inch wheel package.
275/65R18 is a metric radial size where 275 gives the nominal section width in millimeters, 65 is the aspect ratio, and 18 indicates the wheel diameter. For the 2009 Ford Trucks F-150 STX, this is the 18-inch fitment associated with the 4x4 sub-model. In available products, this size appears as a BFGoodrich All-Terrain T/A KO2 with raised white letters, giving it a more traditional truck-tire presentation. This size is the one to compare when an STX 4x4 has 18-inch wheels and the goal is to maintain the truck’s existing wheel diameter and overall fitment type.
Tire fitment on the 2009 Ford Trucks F-150 STX varies by sub-model, so identifying whether the truck is a 4x2 or 4x4 is the first step. Each configuration uses its own pair of radial tire sizes across 17-inch and 18-inch wheel options.
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2009 Ford Trucks F-150 STX 4x2
The 2009 Ford Trucks F-150 STX 4x2 uses two radial fitments, one on a 17-inch rim and one on an 18-inch rim. Tire selection starts with confirming which wheel diameter is on the truck now, then comparing the available tire choice within that exact size.
The 2009 Ford Trucks F-150 STX 4x4 uses a different pair of radial sizes than the 4x2, again split between 17-inch and 18-inch wheels. That makes drivetrain and wheel confirmation essential before replacement, especially on trucks that may have had wheels changed during their service life.
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 STX Tires for Sale
Available product choices for the 2009 Ford Trucks F-150 STX currently center on BFGoodrich All-Terrain T/A KO2 tires in select sizes. The product grid is most useful for comparing exact size, raised white letter styling, rim-width range, weight, and load capacity within the correct STX fitment.
These FAQs focus on the tire sizes used on the 2009 Ford Trucks F-150 STX, how 4x2 and 4x4 fitments differ, and what to check when comparing wheel diameter, tire selection, and road-use readiness.
Tire Size & Fitment
What tire size fits a 2009 Ford Trucks F-150 STX?
A 2009 Ford Trucks F-150 STX uses one of four radial tire sizes: 255/65R17, 265/60R18, 255/70R17, or 275/65R18. The 4x2 uses 255/65R17 or 265/60R18, while the 4x4 uses 255/70R17 or 275/65R18.
The key is matching the tire to the truck’s exact drivetrain and wheel diameter rather than treating all STX models the same. A quick check of the door placard, existing tire sidewall, and actual wheel size helps narrow the truck to the correct fitment before comparing tread style, load capacity, or brand.
What size rim does a 2009 Ford Trucks F-150 STX use?
The 2009 Ford Trucks F-150 STX uses either a 17-inch or 18-inch rim, depending on the tire size and sub-model configuration. The 17-inch fitments are 255/65R17 and 255/70R17, while the 18-inch fitments are 265/60R18 and 275/65R18.
Rim diameter needs to be confirmed before anything else because a 17-inch tire cannot be mounted on an 18-inch wheel, and the reverse is also true. Trucks that have seen wheel swaps over time should be checked carefully so the replacement tire matches the actual wheel on the vehicle, not just the model name.
Why does the 2009 Ford Trucks F-150 STX have more than one tire size?
The 2009 Ford Trucks F-150 STX has more than one tire size because fitment varies by 4x2 versus 4x4 configuration and by wheel package. Each sub-model uses two radial sizes, with one size for a 17-inch wheel and another for an 18-inch wheel.
That means tire choice is tied to the truck’s exact setup, not simply to the STX badge. Confirming both drivetrain and wheel diameter avoids ordering a tire that matches the wrong configuration, and it is especially important when a used truck may have been modified or fitted with a different set of factory-style wheels.
Choosing the Right Tire
What should I consider when choosing a tire for a 2009 Ford Trucks F-150 STX?
Start with the exact tire size already matched to the truck’s 4x2 or 4x4 configuration and wheel diameter. On this STX, that means choosing among 17-inch or 18-inch radial sizes that correspond to the truck’s specific setup rather than selecting by appearance alone.
After the size is confirmed, compare practical details such as tread type, sidewall styling, load capacity, and approved rim-width range. A truck used for pavement, mixed driving, or more rugged conditions may lead the owner toward a different tire character, but the correct fitment foundation still comes first.
What sidewall styles are available for 2009 Ford Trucks F-150 STX tires?
Among the currently available products for the 2009 Ford Trucks F-150 STX, the visible sidewall style is RWL, or raised white letter. That styling appears on available BFGoodrich All-Terrain T/A KO2 fitments for select STX tire sizes.
Sidewall style mainly affects appearance, but it can matter to buyers who want a more traditional truck look rather than a plain black sidewall presentation. The important part is to choose the right size first, then decide whether the available sidewall treatment suits the way the truck is being kept or driven.
What brands offer tires for the 2009 Ford Trucks F-150 STX?
Current product coverage for the 2009 Ford Trucks F-150 STX includes BFGoodrich, specifically in the All-Terrain T/A KO2 series for select fitments. Those options are available in radial construction and are tied to exact STX tire sizes rather than the full model range as a whole.
Brand selection only helps after the truck’s correct size is pinned down, since the STX uses different tires across 4x2 and 4x4 versions. Once the size is confirmed, the buyer can compare the available BFGoodrich option by load figure, rim-width range, sidewall style, and overall intended use.
Restoration & Appearance
Which tire should I choose for a period-style 2009 Ford Trucks F-150 STX?
A period-style choice for a 2009 Ford Trucks F-150 STX starts with preserving the truck’s correct original-size relationship to its 4x2 or 4x4 configuration and to its 17-inch or 18-inch wheel package. Keeping the proper metric radial size does more for the truck’s visual stance than simply choosing an aggressive tread pattern.
Appearance-minded owners should also consider whether a raised white letter sidewall suits the truck’s late-2000s sport-truck look. If originality matters closely, compare the current wheel and tire presentation with surviving examples, factory literature, or marque-specific references before making a final appearance decision.
Does correct tire fitment matter for a 2009 Ford Trucks F-150 STX restoration?
Correct tire fitment matters because the 2009 Ford Trucks F-150 STX was offered with multiple size and wheel combinations, and each one affects the truck’s stance and overall presentation. Using the wrong diameter or profile can change the look noticeably, even when the tire still appears close at first glance.
Restoration-oriented buyers should verify the truck’s exact 4x2 or 4x4 configuration and the wheel diameter it is meant to carry before selecting a replacement set. That approach keeps the visual proportions closer to the truck’s intended setup and reduces the chance of mismatched appearance from front to rear or side to side.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Ford Trucks F-150 STX?
Yes, modifications can affect tire fitment on a 2009 Ford Trucks F-150 STX. Aftermarket wheels, suspension lifts, leveling kits, lowering changes, or body trimming can alter the clearance relationship around the tire even when the size sounds close to one of the STX’s original fitments.
A modified truck should be checked for actual wheel diameter, wheel width, and clearance at full steering lock and suspension travel before new tires are chosen. Even on an unmodified STX, verifying the existing setup is worthwhile because used trucks often carry changes made by prior owners.
What should I inspect before driving a 2009 Ford Trucks F-150 STX on new tires?
Before driving a 2009 Ford Trucks F-150 STX on new tires, inspect inflation pressure, lug torque, valve stems, and visible clearance around the front suspension, fenders, and inner wheel openings. It is also smart to confirm that all four tires match the intended size and are mounted on the correct wheel diameter.
A short initial drive followed by a second inspection helps catch rubbing, uneven settling, or pressure loss early. Owners should also pay attention to any vibration or steering pull, since those signs can point to balancing, alignment, or installation issues that deserve attention before regular road use.
How should tires on a 2009 Ford Trucks F-150 STX be maintained?
Tires on a 2009 Ford Trucks F-150 STX should be maintained with regular pressure checks, visual inspections, and routine attention to tread wear across all four corners. Watching for cracking, cuts, bulges, irregular wear, or slow air loss is especially important on trucks that spend time parked between uses.
Rotation and alignment checks help preserve even wear, particularly on a pickup that may see changing cargo loads or mixed driving conditions. Good maintenance also includes checking tire age, keeping the truck stored away from prolonged sun exposure when possible, and rechecking pressures before a longer trip.
