The 2020 Mazda Trucks CX-9 sits in the modern three-row crossover category, blending family utility with the sharper road manners and cleaner design language that helped separate Mazda from many mainstream rivals. Buyers usually arrive here with one key fitment question, because tire choice on this CX-9 depends on trim. Grand Touring and Signature models use 255/50R20 radials, while Sport and Touring models use 255/60R18 radials. That means the real decision is not only brand and tread choice, but also confirming the wheel diameter already on the vehicle. For everyday road use, appearance, and ride expectations, matching the correct size to the exact sub-model comes first.
Which Tire Size Is Right for The 2020 Mazda Trucks CX-9
The 2020 Mazda Trucks CX-9 uses two primary tire sizes, and the difference comes down to sub-model and wheel diameter. Both are radial metric sizes, but one fits an 18-inch rim and the other fits a 20-inch rim, so the first step is confirming the exact trim and wheel setup before choosing a tire.
255/50R20 is a metric radial size in which 255 refers to section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 20 is the rim diameter in inches. On the 2020 Mazda Trucks CX-9, this size belongs to sub-models equipped with 20-inch wheels rather than the full model range. Its lower-profile format gives this fitment a distinct selection path from the 18-inch setup, even though both share similar overall diameter. Choosing it starts with confirming that the vehicle still carries the correct 20-inch wheel package and has not been changed to another rim size.
255/60R18 is a metric radial size where 255 indicates section width in millimeters, 60 is the aspect ratio, R means radial construction, and 18 identifies the wheel diameter in inches. On the 2020 Mazda Trucks CX-9, this size applies to sub-models fitted with 18-inch wheels. Although it shares nearly the same overall diameter as the 20-inch fitment, it is matched to a different wheel size and cannot be selected by diameter alone. This is the right size to evaluate after confirming the vehicle's trim level and verifying that the original 18-inch wheel setup remains in place.
Tire fitment on the 2020 Mazda Trucks CX-9 varies by sub-model, so trim identification matters before anything else. Two sub-models use an 18-inch radial setup, while two others use a 20-inch radial setup, making wheel diameter just as important as size code.
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2020 Mazda Trucks CX-9 Grand Touring
The 2020 Mazda Trucks CX-9 Grand Touring uses the 255/50R20 radial tire size. Tire selection for this sub-model starts with confirming the 20-inch wheel package, then narrowing choices based on the driving feel and tire category you want for everyday road use.
The 2020 Mazda Trucks CX-9 Signature also uses the 255/50R20 radial size. That keeps the fitment path straightforward as long as the vehicle still has its 20-inch wheels, but it is still worth checking the actual wheel setup before replacing tires.
The 2020 Mazda Trucks CX-9 Sport uses the 255/60R18 radial tire size. For this sub-model, the main priority is staying with the correct 18-inch fitment and verifying that no wheel or suspension changes have altered the original tire selection requirements.
The 2020 Mazda Trucks CX-9 Touring uses the same 255/60R18 radial size as the Sport. That makes replacement simpler when the original 18-inch wheel setup is still in place, but trim and wheel confirmation should still come before selecting a tire.
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
For the 2020 Mazda Trucks CX-9, the biggest questions center on the two tire sizes, the difference between 18-inch and 20-inch wheel fitments, and what to inspect before replacing tires on a trim-specific setup.
Tire Size & Fitment
What tire size fits a 2020 Mazda Trucks CX-9?
The 2020 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 metric sizes, but they are tied to different sub-models and different wheel diameters.
The practical step is to confirm the exact trim and then verify the wheel diameter already on the vehicle. A CX-9 with aftermarket wheels or a previous wheel-package change may no longer match the original sub-model fitment, so checking the tire sidewall and wheel size before ordering replacements helps prevent a mismatch.
What size rim does a 2020 Mazda Trucks CX-9 use?
The 2020 Mazda Trucks CX-9 uses either an 18-inch rim or a 20-inch rim, depending on sub-model. Sport and Touring models use the 255/60R18 size on an 18-inch wheel, while Grand Touring and Signature models use the 255/50R20 size on a 20-inch wheel.
That means wheel diameter should be checked before choosing a replacement tire, especially on a used vehicle. Similar overall tire diameter does not make an 18-inch tire suitable for a 20-inch wheel, so the safest approach is to confirm the actual wheel size stamped on the wheel or printed on the current tire.
Do all 2020 Mazda Trucks CX-9 sub-models use the same tire size?
No. The 2020 Mazda Trucks CX-9 has trim-specific tire fitment. Grand Touring and Signature models use 255/50R20, while Sport and Touring models use 255/60R18. All of them use radial construction, but the tire size and rim diameter change with the sub-model.
That distinction matters because the first decision is not brand or tread pattern, but identifying the exact CX-9 trim and wheel setup. Even though the two sizes are close in overall diameter, they are built for different rim diameters, so selecting by appearance alone can lead to the wrong tire choice.
Choosing the Right Tire
What should I consider when choosing a 255/50R20 tire for a 2020 Mazda Trucks CX-9?
A 255/50R20 tire is the correct primary size for the 2020 Mazda Trucks CX-9 Grand Touring and Signature. The main selection factors are staying with the correct size, confirming the vehicle still has 20-inch wheels, and choosing a tire type that matches how the CX-9 is actually driven.
Tire choice becomes easier once fitment is confirmed. Look at overall use, such as daily commuting, highway travel, or a more comfort-oriented driving preference, and compare product specifications carefully. On a used CX-9, it is also smart to verify that all four wheels match and that prior wheel changes have not altered the intended setup.
What should I consider when choosing a 255/60R18 tire for a 2020 Mazda Trucks CX-9?
A 255/60R18 tire fits the 2020 Mazda Trucks CX-9 Sport and Touring when those models retain their original 18-inch wheel fitment. Start with the correct size and radial construction, then focus on how the tire will be used, including routine street driving, longer highway trips, or mixed daily use.
The next step is checking the vehicle itself rather than relying only on trim assumptions. An owner may have changed wheels, replaced only part of a set, or fitted a non-original package, so reading the current sidewall and confirming the wheel diameter helps keep the replacement decision accurate and straightforward.
How do I choose between the available tires for a 2020 Mazda Trucks CX-9?
The best starting point is the exact factory-size fitment for the sub-model: 255/50R20 for Grand Touring and Signature, or 255/60R18 for Sport and Touring. Once that is settled, compare tires by category, intended road use, and how you want the CX-9 to feel in everyday driving.
Some owners prioritize a quieter highway ride, while others care more about steering feel, seasonal versatility, or tread design. Those preferences matter only after the correct size and wheel diameter are confirmed, because trim-specific fitment remains the first filter on any 2020 Mazda Trucks CX-9 tire selection.
Restoration & Appearance
Does correct tire fitment matter for a 2020 Mazda Trucks CX-9 restoration?
Yes. Even on a modern vehicle like the 2020 Mazda Trucks CX-9, correct tire fitment affects how authentic and properly sorted the vehicle appears. The right size also preserves the intended relationship between the tire, wheel, and wheel opening, which is especially important when returning a vehicle to stock-style presentation.
A restoration-minded owner should begin by confirming the exact sub-model and matching wheel diameter, since this CX-9 uses either 18-inch or 20-inch fitment depending on trim. If originality matters closely, comparing the current setup with window-sticker records, dealer literature, or marque-specific references can help confirm the proper appearance.
How does tire size affect the appearance of a 2020 Mazda Trucks CX-9?
Tire size changes the visual balance of the 2020 Mazda Trucks CX-9 because each fitment is built around a different wheel diameter. The 255/50R20 size presents a shorter sidewall on a larger wheel, while the 255/60R18 size pairs a taller sidewall with an 18-inch wheel, creating a different overall look.
That is why appearance decisions should still begin with the correct trim-level fitment rather than personal preference alone. A CX-9 that is meant to retain its stock-style presentation will look more coherent when the tire size matches the wheel package intended for that specific sub-model.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Mazda Trucks CX-9?
Yes. Wheel changes, suspension alterations, and prior tire substitutions can all affect tire fitment on a 2020 Mazda Trucks CX-9. That matters here because the model already has two trim-specific sizes, one for 18-inch wheels and one for 20-inch wheels, so modifications can blur the original fitment path quickly.
A careful check should include actual wheel diameter, wheel width, current tire size, and any signs of clearance issues at the fenders or during steering. Lowering, offset changes, or mixed wheel sets can change what is currently on the vehicle, even when the trim badge suggests a different original setup.
What should I inspect before driving a 2020 Mazda Trucks CX-9 on new tires?
Before driving a 2020 Mazda Trucks CX-9 on new tires, inspect the wheel condition, confirm proper inflation, and make sure the installed size matches the vehicle's actual wheel diameter and trim setup. It is also worth checking for uneven wear patterns that could point to alignment or suspension issues.
A short road test should follow any tire replacement, with attention to vibration, steering pull, or rubbing at full lock. Collector cars are not the only vehicles that need a careful once-over; even a daily-driven CX-9 benefits from verifying lug torque, tread seating, and consistent air pressure across all four tires.
What should I check before a longer drive in a 2020 Mazda Trucks CX-9?
Before a longer drive, check tire pressure, tread condition, visible cuts or bulges, and any signs of cracking or air loss. On a 2020 Mazda Trucks CX-9, it is equally important to confirm that all four tires are the correct matching size for the wheel setup, since this model uses either 18-inch or 20-inch fitment.
Longer trips also make it worthwhile to inspect the spare, look for uneven shoulder wear, and pay attention to any vibration already present in normal driving. A vehicle that has had wheel swaps or partial tire replacement should be reviewed especially carefully so the trip begins with a matched and stable setup.
