The 2019 Ford Trucks Flex stands apart from most modern crossovers with its long, wagon-like profile and full-size family-hauler character. Its squared-off styling and broad stance give it a very different visual presence from more rounded utility vehicles of the same era, which makes tire choice part of both the driving setup and the overall look. Tire fitment on the 2019 Ford Trucks Flex is fully radial, with four primary sizes tied to specific sub-models and wheel diameters. That means the first step is confirming the exact trim and wheel package, especially where 20-inch fitment overlaps multiple sub-models. From there, the decision shifts to selecting the right road-use style and sidewall presentation.
Which Tire Size Is Right for The 2019 Ford Trucks Flex
The 2019 Ford Trucks Flex uses four primary tire sizes, and they vary by sub-model and wheel diameter. SE models use a different size from SEL and Limited trims, while 20-inch fitment appears on more than one sub-model. The first step is confirming the exact trim level and the actual wheel diameter on the vehicle before comparing tire choices.
235/55R19 is a modern metric radial size in which 235 identifies the nominal section width in millimeters, 55 is the aspect ratio, R designates radial construction, and 19 is the rim diameter in inches. On the 2019 Ford Trucks Flex, this size belongs to a radial fitment strategy that suits a later-model crossover rather than a vintage sizing system. Product choice in this exact size is less about period-style presentation and more about matching the vehicle’s wheel setup and intended driving use. This size should be selected only when it matches the trim and wheel package already on the vehicle.
255/45R20 is a modern metric radial size with a 255-millimeter nominal section width, a 45-series profile, radial construction, and a 20-inch rim diameter. This is the widest primary fitment used on the 2019 Ford Trucks Flex, and it appears on certain SEL and Limited configurations with 20-inch wheels. Available choices in this size include BFGoodrich, Nitto, and Pro-Trac, with Blackwall, raised white letter, and Redline sidewall treatments across several tire series. It is the size to evaluate when the vehicle already carries the larger 20-inch wheel setup and appearance matters alongside fitment.
235/60R17 is a metric radial size that combines a 235-millimeter nominal section width, a 60-series aspect ratio, radial construction, and a 17-inch rim diameter. On the 2019 Ford Trucks Flex, this size is tied to the SE sub-model and should be viewed as a trim-specific fitment rather than a universal Flex tire size. Its meaning is straightforward by modern standards, but the key practical issue is still wheel confirmation because a Flex fitted with different wheels may no longer match this setup. Choose this size only after verifying that the vehicle retains its correct 17-inch wheel diameter.
235/60R18 is a metric radial tire size where 235 gives the nominal width in millimeters, 60 indicates the aspect ratio, R marks radial construction, and 18 denotes the rim diameter in inches. This size applies to certain 2019 Ford Trucks Flex SEL configurations and sits between the 17-inch and 20-inch fitments used elsewhere in the model range. Tire selection here centers on matching the existing wheel package rather than choosing among multiple vintage-style constructions or equivalent formats. It is the right size to pursue when the vehicle is an SEL with its 18-inch wheel setup still in place.
Tire fitment for the 2019 Ford Trucks Flex depends on the specific sub-model and wheel package rather than one size covering the entire lineup. Checking the trim matters here because SE, SEL, and Limited models do not all use the same primary tire size, and some trims can overlap at 20 inches.
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2019 Ford Trucks Flex Limited
The 2019 Ford Trucks Flex Limited uses radial fitments in either 235/55R19 or 255/45R20, so wheel diameter is the critical first check. Once the 19-inch or 20-inch setup is confirmed, tire selection becomes a matter of choosing the right road-use character and sidewall style within that exact size.
The 2019 Ford Trucks Flex SE uses the 235/60R17 radial size, making its fitment more straightforward than the trims with multiple wheel packages. Tire selection here is mainly about staying with the correct 17-inch setup and confirming that the vehicle has not been changed to a different wheel diameter.
The 2019 Ford Trucks Flex SEL can use either 235/60R18 or 255/45R20, so trim name alone is not enough to choose a tire. The practical step is confirming whether the vehicle is on 18-inch or 20-inch wheels before comparing available products, appearance treatments, or performance-oriented series.
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 2019 Ford Trucks Flex Tires for Sale
Available product choice centers on 255/45R20, with BFGoodrich, Nitto, and Pro-Trac options in multiple tire series. Sidewall presentation also varies in this size, including Blackwall, raised white letter, and Redline treatments, so appearance can be part of the decision along with wheel compatibility.
For the 2019 Ford Trucks Flex, the key questions usually involve trim-specific tire size, wheel diameter, 20-inch fitment, available sidewall treatments, and what to inspect before putting a crossover that may see mixed family and highway use back on the road.
Tire Size & Fitment
What tire size fits a 2019 Ford Trucks Flex?
The 2019 Ford Trucks Flex uses four primary radial tire sizes: 235/60R17, 235/60R18, 235/55R19, and 255/45R20. The correct size depends on the sub-model and wheel package, with SE using 235/60R17, SEL using either 235/60R18 or 255/45R20, and Limited using either 235/55R19 or 255/45R20.
The practical choice starts with confirming the exact trim and the actual wheel diameter on the vehicle. A Flex with replacement wheels, a package change, or a previous tire swap may not still match the size expected for its trim, so checking the tire placard and the wheels themselves is more useful than relying on model name alone.
What size rim does a 2019 Ford Trucks Flex use?
The 2019 Ford Trucks Flex uses four rim diameters across its primary tire fitments: 17-inch, 18-inch, 19-inch, and 20-inch. Those diameters correspond to 235/60R17, 235/60R18, 235/55R19, and 255/45R20, all in radial construction.
Wheel diameter is the first fitment check because each tire size is tied to a specific rim size. Even within the same model year, SEL and Limited trims can differ, so measuring or reading the wheel and tire marking on the vehicle helps prevent choosing a tire that matches the trim name but not the actual setup now installed.
Do all 2019 Ford Trucks Flex sub-models use the same tire size?
No, the 2019 Ford Trucks Flex does not use one tire size across every sub-model. SE uses 235/60R17, SEL uses either 235/60R18 or 255/45R20, and Limited uses either 235/55R19 or 255/45R20, so fitment varies by trim and wheel package.
That variation means the buyer should identify both the sub-model and the wheel diameter before comparing tires. The overlap at 255/45R20 is useful, but it does not make every Flex a 20-inch vehicle, and a trim badge by itself is not enough if the wheels have been changed since the vehicle was new.
Choosing the Right Tire
What should I consider when choosing a 255/45R20 tire for a 2019 Ford Trucks Flex?
A 255/45R20 tire for a 2019 Ford Trucks Flex should first match the vehicle’s actual 20-inch wheel setup. After size confirmation, the main differences are brand, tire series, sidewall style, and supporting specifications such as rim-width range, weight, and load figures where those details are stated.
The available choices in this size include BFGoodrich, Nitto, and Pro-Trac, with Blackwall, raised white letter, and Redline presentations. That gives the buyer room to balance visual style with intended use, but the wheel width and overall vehicle setup still need to be checked so the selected tire matches the Flex rather than just the printed size.
What sidewall styles are available for 2019 Ford Trucks Flex tires?
In the available 255/45R20 product range for the 2019 Ford Trucks Flex, sidewall styles include Blackwall, raised white letter, and Redline. Those choices create noticeably different looks even when the tire size stays the same, especially on a vehicle like the Flex with a strong body-side visual presence.
Sidewall style should be chosen after the correct tire size and wheel diameter are confirmed. Blackwall keeps the appearance understated, while raised white letter and Redline options add more visual emphasis, but each still needs to be evaluated as a proper 255/45R20 fitment for the vehicle’s wheel and intended use.
What brands offer tires for the 2019 Ford Trucks Flex?
Available 255/45R20 tires for the 2019 Ford Trucks Flex come from BFGoodrich, Nitto, and Pro-Trac. The product mix also spans several tire series, including g-Force Comp 2 AS, g-Force Sport Comp 2, Nitto NT555 G2, and Street Pro III.
Brand choice is only one part of the decision. It helps to compare each tire by size match, construction, sidewall treatment, and wheel compatibility, especially on a Flex using the 20-inch setup where visual style and road-use priorities can both influence the final selection without changing the required primary size.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Ford Trucks Flex restoration or preservation project?
Yes, correct tire fitment matters on a 2019 Ford Trucks Flex even though it is a modern vehicle rather than a traditional antique or muscle car application. The model’s proportions make wheel-and-tire balance easy to notice, so the right size helps preserve both stance and intended road manners.
A preservation-minded approach starts with the trim-specific size and wheel diameter already tied to the vehicle, then narrows the choice by sidewall appearance and tire character. Anyone pursuing strict originality should compare the vehicle against window-sticker, dealer, or marque-specific documentation before treating any present tire or wheel setup as definitive.
Which sidewall style suits a period-style 2019 Ford Trucks Flex?
For a 2019 Ford Trucks Flex on 255/45R20 tires, the available sidewall styles include Blackwall, raised white letter, and Redline. The best visual match depends on whether the goal is a restrained stock-leaning presentation or a more customized look that emphasizes the Flex’s broad, wagon-like profile.
Blackwall usually keeps the appearance closest to a subtle everyday-driver theme, while raised white letter and Redline make a stronger statement. Sidewall style should still be chosen within the correct size and wheel setup, because appearance only helps when the tire also matches the actual 20-inch fitment on the vehicle.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Ford Trucks Flex?
Yes, modifications can affect tire fitment on a 2019 Ford Trucks Flex. Aftermarket wheels, suspension changes, lowering, brake upgrades, or body alterations can change the wheel diameter, usable rim width, and available clearance, even if the vehicle still carries one of the original trim names.
That is especially important on Flex models using 20-inch tires, where wheel width and overall package choice matter as much as the printed size. A modified vehicle should be checked at the wheel and at full steering travel before selecting replacement tires, rather than assuming the original trim-based fitment still applies without qualification.
What should I inspect before driving a 2019 Ford Trucks Flex on new tires?
Before driving a 2019 Ford Trucks Flex on new tires, inspect the wheel size, tire pressure, lug torque, tread and sidewall condition, and valve stems. It also helps to confirm that all four tires are the intended size for the trim and that there is no rubbing at normal ride height or during steering movement.
A short initial drive should be used to check for vibration, pulling, unusual noise, or contact inside the wheelhouse. Any Flex that has sat for long periods or has seen wheel changes deserves an extra look at alignment, brake condition, and suspension wear so the new tires are not asked to compensate for unrelated problems.
What should I check before a longer drive in a 2019 Ford Trucks Flex?
Before a longer drive in a 2019 Ford Trucks Flex, confirm that the tire size matches the vehicle’s actual wheel setup and that pressures are set consistently across all four tires. The tires should also be checked for cuts, punctures, bulges, uneven wear, and any sign of air loss that might not be obvious during short local use.
A longer trip puts more importance on condition rather than just fitment. It is wise to inspect the spare arrangement if equipped, look over the wheels for damage, and make sure the suspension and steering feel stable with the chosen tire package, particularly on a Flex that may carry passengers or luggage over highway distances.
