The 2017 Ford Trucks Flex stands apart from typical modern crossovers with its long, squared-off profile and wagon-inspired character, giving it a strong following among drivers who want utility without giving up style. Tire selection on this model is more configuration-specific than it first appears, because the Flex uses four different radial sizes across SE, SEL, and Limited trims, with wheel diameters ranging from 17 to 20 inches. That makes the first step identifying the exact sub-model and wheel setup. For owners running 20-inch wheels, available choices also branch into different tire series and sidewall looks, including Blackwall, raised white letter, and Redline treatments.
Which Tire Size Is Right for The 2017 Ford Trucks Flex
The 2017 Ford Trucks Flex uses four primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All four fitments are radial, but they span 17-, 18-, 19-, and 20-inch rims, so the most important step is confirming both the trim level and the actual wheels on the vehicle before choosing a tire.
235/55R19 is a metric radial size in which 235 identifies the nominal section width in millimeters, 55 is the aspect ratio, R indicates radial construction, and 19 is the wheel diameter in inches. On the 2017 Ford Trucks Flex, this size is part of the model's modern radial fitment range and belongs to vehicles using a 19-inch wheel. Its sizing balances a relatively substantial sidewall with a larger-diameter rim. This is the size to evaluate when the Flex is equipped with the corresponding 19-inch wheel package rather than the 17-, 18-, or 20-inch alternatives.
255/45R20 is a metric radial size that uses a wider 255-millimeter section width, a 45-series profile, and a 20-inch rim diameter. On the 2017 Ford Trucks Flex, it serves the configurations built around the largest primary wheel diameter in this fitment group. Available product choices in this size include BFGoodrich, Nitto, and Pro-Trac, with tire series such as g-Force Comp 2 AS, g-Force Sport Comp 2, Nitto NT555 G2, and Street Pro III, plus Blackwall, RWL, and Redline sidewall styles. It is the right size to consider only after confirming the vehicle actually wears 20-inch wheels.
235/60R17 is a metric radial size with a 235-millimeter section width, a 60-series aspect ratio, and a 17-inch rim diameter. Within the 2017 Ford Trucks Flex range, this size applies to vehicles using the smallest wheel diameter of the four primary fitments. Its profile combines a moderate sidewall height with a clearly defined modern radial format. This is the size to pursue when the Flex has the correct 17-inch wheel setup, since moving between the model's other listed sizes also changes rim diameter and should never be assumed from appearance alone.
235/60R18 is a metric radial size in which the 235-millimeter section width is paired with a 60-series profile on an 18-inch wheel. For the 2017 Ford Trucks Flex, it fills the middle ground between the smaller 17-inch fitment and the larger 19- and 20-inch options used elsewhere in the lineup. The construction is fully modern radial, matching the vehicle's original fitment style for this configuration. This size deserves a careful look when selecting tires for an SEL-equipped Flex, especially if the vehicle's wheels may have been changed since new.
Tire fitment on the 2017 Ford Trucks Flex varies by sub-model, and some trims can use more than one primary size depending on wheel configuration. Checking the exact trim and wheel diameter matters before comparing tires, because this is not a one-size-fits-all application across the entire Flex lineup.
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2017 Ford Trucks Flex Limited
The 2017 Ford Trucks Flex Limited uses radial tire fitments tied to either a 19-inch or 20-inch wheel setup. That means tire selection starts with confirming which wheel package is on the vehicle, then comparing the available tire characteristics that match that exact diameter and profile.
The 2017 Ford Trucks Flex SE uses a single primary radial fitment built around a 17-inch wheel. That makes size identification more straightforward, though it is still worth confirming that the vehicle has not been changed to a different wheel diameter over time.
The 2017 Ford Trucks Flex SEL can use either an 18-inch or 20-inch radial tire fitment depending on the wheel configuration. Selecting tires for an SEL starts with verifying the actual wheel diameter on the vehicle so the correct size family is chosen from the start.
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 2017 Ford Trucks Flex Tires for Sale
For 20-inch 2017 Ford Trucks Flex fitment, the available products span BFGoodrich, Nitto, and Pro-Trac lines with distinct tire series and sidewall treatments. Buyers comparing 255/45R20 options can sort through Blackwall, raised white letter, and Redline presentations along with differences in rim-width specification and load detail.
Owners shopping tires for a 2017 Ford Trucks Flex usually need to sort out trim-specific size differences, wheel diameter, and the available choices within 20-inch fitment. The questions below focus on size, rim fitment, product selection, appearance, and road-use checks.
Tire Size & Fitment
What tire size fits a 2017 Ford Trucks Flex?
The 2017 Ford Trucks Flex uses four primary radial tire sizes: 235/60R17, 235/60R18, 235/55R19, and 255/45R20. The correct size depends on the exact sub-model and wheel package, so there is not one universal tire size for every Flex in the 2017 model year.
The practical first step is to confirm both the trim and the actual wheel diameter on the vehicle. SE models use a different size from Limited and some SEL configurations, and Limited and SEL can overlap with 20-inch fitment, so choosing by appearance alone can easily lead to the wrong tire.
What size rim does a 2017 Ford Trucks Flex use?
A 2017 Ford Trucks Flex may use 17-inch, 18-inch, 19-inch, or 20-inch rims depending on the trim and wheel setup. Those rim diameters correspond to the primary tire sizes 235/60R17, 235/60R18, 235/55R19, and 255/45R20.
Rim diameter is the most important fitment check on this vehicle because each primary tire size is built around a different wheel size. A tire that belongs on a 20-inch wheel cannot be substituted onto a 17-, 18-, or 19-inch rim, so wheel confirmation needs to come before comparing tread, brand, or sidewall style.
Why does the 2017 Ford Trucks Flex have more than one tire size?
The 2017 Ford Trucks Flex has more than one tire size because fitment changes with sub-model and wheel package. SE uses 235/60R17, SEL can use 235/60R18 or 255/45R20, and Limited can use 235/55R19 or 255/45R20.
That means tire choice is tied to the exact configuration rather than the model name alone. It is especially important on vehicles that may have had wheel changes over time, because a Flex wearing aftermarket or swapped factory wheels should be matched to the wheel diameter actually on the vehicle, not just the original trim badge.
Choosing the Right Tire
What should I consider when choosing a 255/45R20 tire for a 2017 Ford Trucks Flex?
Start with the basics: 255/45R20 must match a Flex that actually has the 20-inch wheel setup. From there, the choice comes down to comparing radial tire series, sidewall style, rim-width specification, and any available load information within the products offered in that size.
The 20-inch options vary more than just by brand name. Some owners may want a straightforward Blackwall look, while others may prefer raised white letter or Redline styling for a more distinctive presentation, and it also helps to confirm that the wheel width falls within the tire's intended range before making a final selection.
What sidewall styles are available for 2017 Ford Trucks Flex tires?
Within the available 255/45R20 fitment for the 2017 Ford Trucks Flex, sidewall styles include Blackwall, RWL, and Redline. Blackwall appears across several options, while Pro-Trac Street Pro III is available with either raised white letter or Redline sidewall treatment.
Sidewall style does not change the basic tire size requirement, but it can strongly affect the vehicle's appearance. A buyer choosing among 20-inch Flex tires should first confirm the correct size and wheel, then decide whether a low-key modern look or a more expressive sidewall presentation better suits the vehicle.
What brands offer tires for the 2017 Ford Trucks Flex?
Available 255/45R20 tires for the 2017 Ford Trucks Flex include options from BFGoodrich, Nitto, and Pro-Trac. Those products cover several tire series, including BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, Nitto NT555 G2, and Pro-Trac Street Pro III.
Brand is only one part of the decision. It still makes sense to compare the exact series, sidewall treatment, and wheel-width suitability for the size you need, since two tires in the same 255/45R20 fitment can target different appearance preferences even though they share the same core dimensions.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Ford Trucks Flex?
A period-style choice for a 2017 Ford Trucks Flex still begins with the correct modern radial size for the trim and wheel diameter. Since this is a late-model vehicle with radial fitments throughout, appearance usually comes down to choosing the proper size first and then selecting a tire with the visual character you want.
For a 20-inch Flex, sidewall treatment can shape that presentation more than construction choice, since the available products include Blackwall, RWL, and Redline options. A subtle look may favor Blackwall, while owners building a more customized or enthusiast-oriented appearance may lean toward the more visible sidewall styles.
How does tire construction affect the appearance of a restored 2017 Ford Trucks Flex?
Tire construction is straightforward on the 2017 Ford Trucks Flex because the primary fitments are radial across the board. The visual difference is less about bias-ply versus radial and more about maintaining the correct size and wheel proportion for the trim, then choosing the sidewall style that suits the vehicle's overall look.
That makes wheel diameter especially important on a Flex with appearance goals in mind. A 17-inch SE setup presents differently from a 20-inch Limited or SEL configuration, and once the correct wheel and tire size are confirmed, sidewall treatments such as Blackwall, RWL, or Redline become the main appearance decision.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Ford Trucks Flex?
Yes, modifications can affect tire fitment on a 2017 Ford Trucks Flex. Aftermarket wheels, wheel-offset changes, suspension alterations, or lowering can all change the amount of clearance available, even when the tire size itself matches one of the original 2017 Flex fitments.
A modified Flex should be checked for actual wheel diameter, wheel width, and clearance at the fender, suspension, and steering points before new tires are chosen. That matters most on 20-inch applications, where the vehicle may already be running a different wheel package than it had when it left the factory.
What should I inspect before driving a 2017 Ford Trucks Flex on new tires?
Before driving a 2017 Ford Trucks Flex on new tires, inspect the wheels for the correct diameter and condition, confirm the tires are the proper size for the trim and wheel package, and make sure there is no interference at full steering lock or over suspension movement. Tire pressure should also be set correctly.
It also helps to look over the vehicle's broader condition before regular road use. Worn suspension parts, alignment issues, or uneven old-tire wear patterns can all shorten the life of a new set, so a quick check of steering feel, ride height, and visible suspension condition is worthwhile after installation.
How often should tires on a 2017 Ford Trucks Flex be inspected?
Tires on a 2017 Ford Trucks Flex should be inspected regularly for pressure, tread wear, cuts, punctures, sidewall damage, and any signs of uneven wear. A vehicle used for family hauling, commuting, or long highway trips benefits from routine checks rather than waiting for a service interval alone.
Inspection becomes even more important if the Flex has larger wheels, modified suspension, or sees seasonal use. Looking over the tires before a longer drive and after any impact with potholes or road debris helps catch issues early, and it also confirms that the selected tire still has proper clearance and even wear.
