The 2017 Mazda Trucks CX-9 sits in the modern three-row crossover class, blending family use with a more athletic, road-focused character than many larger SUVs. Buyers looking at one today are usually balancing everyday drivability with the need to keep the vehicle’s stance, ride, and wheel setup consistent with the correct trim. Tire fitment centers on two primary radial sizes, 255/50R20 and 255/60R18, and the right choice depends on the exact sub-model and its wheel diameter. That makes this page less about vintage-style construction choices and more about confirming trim, wheel size, and selecting the right radial tire for the vehicle’s actual setup.
Which Tire Size Is Right for The 2017 Mazda Trucks CX-9
The 2017 Mazda Trucks CX-9 uses two primary tire sizes, and the correct one depends on the sub-model and wheel diameter. Both fitments are radial, but one uses an 18-inch rim and the other uses a 20-inch rim, so the first step is confirming the exact trim and checking the wheels currently on the vehicle before choosing a tire.
255/50R20 is a modern metric radial size in which 255 identifies the section width in millimeters, 50 is the aspect ratio, R denotes radial construction, and 20 is the wheel diameter in inches. On the 2017 Mazda Trucks CX-9, this size belongs to specific upper trims rather than every version of the vehicle. Its role is tied directly to the 20-inch wheel package, so selection starts with confirming that wheel diameter on the vehicle. This is the right size to evaluate when keeping the original trim-specific wheel setup and overall fitment approach intact.
255/60R18 is a modern metric radial size that uses a 255-millimeter section width, a 60-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2017 Mazda Trucks CX-9, this fitment applies to specific sub-models equipped with 18-inch wheels. It is not simply a variation of the 20-inch option, because wheel diameter determines which tire can be used. This size should be chosen when the vehicle retains its 18-inch wheel setup or when the current wheels have been verified as the correct diameter for that trim.
Sub-model fitment matters on the 2017 Mazda Trucks CX-9 because the covered trims do not all use the same tire size. The key difference is wheel diameter, so confirming the exact trim and checking whether the vehicle has 18-inch or 20-inch wheels should come before tire selection.
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2017 Mazda Trucks CX-9 Grand Touring
The 2017 Mazda Trucks CX-9 Grand Touring uses the 255/50R20 radial fitment tied to a 20-inch wheel. Tire selection for this trim starts with preserving that wheel diameter and then choosing a replacement tire that matches the vehicle’s trim-specific setup.
The 2017 Mazda Trucks CX-9 Signature also uses the 255/50R20 radial size on a 20-inch rim. That keeps the decision focused on selecting the right tire within that size rather than comparing between the 18-inch and 20-inch fitments.
The 2017 Mazda Trucks CX-9 Sport uses the 255/60R18 radial fitment with an 18-inch wheel. For this trim, the important step is confirming that the vehicle still wears the correct wheel diameter before moving on to tire brand and model comparisons.
The 2017 Mazda Trucks CX-9 Touring uses the 255/60R18 radial size on an 18-inch rim. That means tire choice should stay centered on the 18-inch setup unless the vehicle has already been changed to a different wheel package that needs separate verification.
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.
Frequently Asked Questions
These FAQs focus on the exact tire sizes used on the 2017 Mazda Trucks CX-9, how those sizes vary by sub-model, and what to verify before replacing tires on either the 18-inch or 20-inch wheel setup.
Tire Size & Fitment
What tire size fits a 2017 Mazda Trucks CX-9?
The 2017 Mazda Trucks CX-9 uses two tire sizes: 255/50R20 and 255/60R18. Grand Touring and Signature models use 255/50R20, while Sport and Touring models use 255/60R18. Both are radial sizes, but they are built for different wheel diameters, so the correct fitment depends on the exact trim and the wheels on the vehicle.
The practical first step is checking the sub-model and confirming whether the CX-9 has 18-inch or 20-inch wheels. A tire size that matches one trim will not suit the other if the rim diameter is different. If the vehicle has had wheel changes at some point, verify the actual wheel size before purchasing replacement tires.
What size rim does a 2017 Mazda Trucks CX-9 use?
A 2017 Mazda Trucks CX-9 uses either an 18-inch rim or a 20-inch rim, depending on the sub-model. The 255/60R18 fitment pairs with an 18-inch wheel, while the 255/50R20 fitment pairs with a 20-inch wheel. Both sizes are radial, but the wheel diameter is what separates the two primary fitments.
Rim diameter should be confirmed before anything else, because tire size follows the wheel. Looking only at the vehicle year and model is not enough when two factory-style diameters are in play. Checking the sidewall of the current tire and the wheel itself helps prevent ordering an 18-inch tire for a CX-9 that actually has 20-inch wheels.
Do all 2017 Mazda Trucks CX-9 sub-models use the same tire size?
No. The 2017 Mazda Trucks CX-9 uses two different tire sizes across its sub-models. Grand Touring and Signature models use 255/50R20, while Sport and Touring models use 255/60R18. That means trim level matters when replacing tires, even though the vehicle is the same year, make, and model.
This difference is tied to wheel diameter rather than a simple alternate tire choice within one setup. Choosing by model name alone can still lead to a mismatch if the vehicle has been modified or fitted with different wheels over time. Confirming both the trim and the actual wheel size keeps the replacement decision on the right track.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Mazda Trucks CX-9?
Start with the correct size for the trim: 255/50R20 for Grand Touring and Signature, or 255/60R18 for Sport and Touring. Both are radial fitments, so the key decision is not construction type but matching the tire to the wheel diameter and intended use of the vehicle.
Beyond size, compare the tire’s overall suitability for daily driving, weather conditions, and how the CX-9 is actually used. A vehicle that still has its original-style wheel setup should stay with the matching size, while a CX-9 with later wheel changes needs those wheels verified first. Getting the basics right matters more than chasing small spec differences.
How do I choose between the available 255/50R20 and 255/60R18 tires for a 2017 Mazda Trucks CX-9?
The choice between 255/50R20 and 255/60R18 is not a matter of preference on a stock 2017 Mazda Trucks CX-9. Those sizes belong to different sub-model and wheel combinations, so the correct selection comes from the vehicle’s trim and actual rim diameter rather than from comparing one size against the other.
A buyer should treat these as separate fitments, not interchangeable options. Once the wheel diameter is confirmed, then it makes sense to compare tires within that single size. If the CX-9 has aftermarket wheels, use the wheel itself and the current tire markings as the final guide before choosing a replacement.
What rim-fitment details matter when choosing 2017 Mazda Trucks CX-9 tires?
The most important rim-fitment detail on a 2017 Mazda Trucks CX-9 is diameter. This vehicle uses either an 18-inch or 20-inch wheel depending on the sub-model, and each tire size is built around that specific wheel diameter. Using the wrong diameter tire is the quickest way to end up with an unusable fitment.
It also helps to confirm that the wheels currently on the vehicle are the ones intended for that trim. A CX-9 that has been upgraded or changed by a previous owner may not still match the original sub-model setup. Verifying the actual wheels before purchase keeps the selection process grounded in the vehicle you have now.
Restoration & Appearance
Does correct tire fitment matter for a 2017 Mazda Trucks CX-9 restoration or clean original-style presentation?
Yes. Even on a newer vehicle like the 2017 Mazda Trucks CX-9, correct tire fitment helps preserve the look and stance that belong with the trim’s wheel package. Grand Touring and Signature models use 255/50R20, while Sport and Touring models use 255/60R18, so appearance starts with matching the proper size to the correct wheel diameter.
A clean, original-style presentation depends on more than just having fresh tires. Wheels, ride height, and the overall visual proportion of the vehicle all work together. A CX-9 kept close to its stock configuration usually looks most coherent when its tire size matches the trim-specific setup rather than borrowing the fitment from another model variant.
Which tire should I choose for a period-appropriate or original-style 2017 Mazda Trucks CX-9 look?
For an original-style appearance, the right starting point is the correct trim-specific size rather than a different size that happens to fit the wheel. That means 255/50R20 for Grand Touring and Signature models, or 255/60R18 for Sport and Touring models. Keeping the intended diameter relationship helps preserve the vehicle’s proper visual balance.
The best appearance result usually comes from matching the current tire choice to the wheel package the vehicle was designed around. If the CX-9 has already been altered with different wheels or suspension changes, the look may shift even if the tire is technically usable. Fitment and presentation work best when they are considered together.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Mazda Trucks CX-9?
Yes. Wheel changes, suspension changes, and altered ride height can all affect tire fitment on a 2017 Mazda Trucks CX-9. Even though the primary sizes are 255/50R20 and 255/60R18, those fitments assume the wheel diameter and overall setup match the intended trim configuration of the vehicle.
A CX-9 with aftermarket wheels should be checked carefully before replacement tires are chosen. Clearance at the fenders, steering range, and wheel diameter all matter once a vehicle moves away from its original setup. Using the current wheel and tire markings as a starting point helps avoid choosing by trim alone when the hardware has changed.
What should I inspect before driving a 2017 Mazda Trucks CX-9 on new tires?
Before driving on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and check that each tire is seated and inflated properly. On a 2017 Mazda Trucks CX-9, that means verifying whether the vehicle should be on 255/50R20 or 255/60R18 and making sure all four positions are consistent.
It also makes sense to look over suspension and steering components, especially if the vehicle shows uneven tire wear or has had prior wheel changes. A short road test should confirm there is no rubbing, vibration, or pull. Catching those issues early helps protect the new tires and supports stable day-to-day road use.
What should I check before a longer drive in a 2017 Mazda Trucks CX-9?
Before a longer drive, confirm tire pressure, inspect the tread and sidewalls, and make sure the CX-9 is wearing the correct tire size for its wheel setup. A 2017 Mazda Trucks CX-9 should be on either 255/50R20 or 255/60R18, depending on the sub-model and wheels currently installed.
A longer trip is also a good time to watch for air loss, cuts, bulges, or uneven wear that may point to alignment or suspension issues. Vehicles that have had wheels swapped by a previous owner deserve an extra fitment check before highway use. Tire size, wheel diameter, and overall condition all need to work together for dependable travel.
