The 2009 Mazda Trucks CX-9 arrived as a three-row crossover with a more carlike feel than many truck-based family haulers of its era. That balance of everyday comfort, road manners, and upscale styling makes tire choice especially important today, because wheel and tire package changes can noticeably affect both appearance and driving character. The 2009 Mazda Trucks CX-9 uses radial tires in two primary sizes, 245/60R18 and 245/50R20, depending on sub-model. The key decision is confirming whether the vehicle is a Sport, Touring, or Grand Touring, then choosing a tire that matches the correct rim diameter, profile, and intended use.
Which Tire Size Is Right for The 2009 Mazda Trucks CX-9
Two primary tire sizes apply to the 2009 Mazda Trucks CX-9, and the correct one depends on sub-model and wheel diameter. Sport and Touring models use one size, while Grand Touring uses another, so the first step is confirming the exact trim and whether the vehicle still has its original 18-inch or 20-inch wheel setup before choosing a replacement tire.
In 245/50R20, the 245 identifies nominal section width in millimeters, the 50 is the aspect ratio, the R indicates radial construction, and the 20 is the wheel diameter in inches. This is a modern metric radial size used on the 2009 Mazda Trucks CX-9 Grand Touring, pairing a lower-profile look with a 20-inch wheel. Buyers evaluating this size should focus on maintaining the correct rim diameter and confirming that the vehicle still uses the intended wheel package, especially if wheels have ever been changed from stock-style fitment.
In 245/60R18, the 245 is the nominal section width in millimeters, the 60 is the aspect ratio, the R denotes radial construction, and the 18 identifies the wheel diameter in inches. This modern metric radial size is used on the 2009 Mazda Trucks CX-9 Sport and Touring models and carries a slightly taller sidewall profile than the 20-inch fitment. It is the right size to evaluate when replacing tires on those trims, but wheel diameter and any past wheel or suspension changes should still be checked before ordering.
Sub-model fitment matters on the 2009 Mazda Trucks CX-9 because tire size changes with trim level. Sport and Touring share the same 18-inch tire size, while Grand Touring moves to a 20-inch fitment, so identifying the exact sub-model is essential before selecting tires.
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2009 Mazda Trucks CX-9 Grand Touring
The 2009 Mazda Trucks CX-9 Grand Touring uses the 245/50R20 radial size on a 20-inch wheel. Tire selection for this trim starts with confirming that the vehicle still has the correct 20-inch wheel package, then choosing a replacement that matches the intended ride, appearance, and everyday road use.
The 2009 Mazda Trucks CX-9 Sport uses the 245/60R18 radial size on an 18-inch wheel. That keeps tire selection straightforward, but it is still worth checking the actual wheel setup on the vehicle in case aftermarket wheels or previous owner changes have altered the original fitment.
The 2009 Mazda Trucks CX-9 Touring also uses the 245/60R18 radial size on an 18-inch wheel. Buyers replacing tires on a Touring can concentrate on matching that size correctly, while also confirming wheel diameter and clearance if the vehicle has been modified or no longer wears its original-style wheels.
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
Owners of a 2009 Mazda Trucks CX-9 usually need to confirm trim-specific tire size, wheel diameter, and how any wheel or suspension changes may affect replacement choices. These FAQs focus on fitment, radial sizing, selection priorities, and road-use checks for this exact model.
Tire Size & Fitment
What tire size fits a 2009 Mazda Trucks CX-9?
The 2009 Mazda Trucks CX-9 uses two tire sizes, depending on sub-model. Grand Touring models use 245/50R20, while Sport and Touring models use 245/60R18. Both are radial tire sizes, but they are built for different wheel diameters, so they are not the same fitment choice.
The most important step is identifying the exact trim level and confirming the wheel diameter currently on the vehicle. A CX-9 that has had aftermarket wheels installed may no longer match its original sub-model fitment, so checking the tire sidewall and the wheel before replacing tires helps avoid ordering the wrong size.
What size rim does a 2009 Mazda Trucks CX-9 use?
A 2009 Mazda Trucks CX-9 uses either an 18-inch or 20-inch rim, depending on sub-model. Sport and Touring models use the 245/60R18 size, which mounts on an 18-inch wheel, while Grand Touring models use 245/50R20, which mounts on a 20-inch wheel.
Wheel diameter should be confirmed before any tire purchase because the two CX-9 fitments do not share the same rim size. Looking only at the vehicle name is not enough when trims differ, and any previous wheel swap can change what the vehicle needs today.
Do all 2009 Mazda Trucks CX-9 sub-models use the same tire size?
No. The 2009 Mazda Trucks CX-9 Grand Touring uses 245/50R20, while the Sport and Touring use 245/60R18. All three trims use radial construction, but the tire size and wheel diameter are not the same across the lineup.
That means trim identification matters before comparing replacement tires. It also means wheel appearance alone can be a clue, since the Grand Touring uses a 20-inch fitment. Still, the safest approach is to verify the actual tire size on the vehicle and make sure it matches the intended wheel setup.
Choosing the Right Tire
What should I consider when choosing a tire for a 2009 Mazda Trucks CX-9?
Start with the correct size for the exact sub-model: 245/60R18 for Sport and Touring or 245/50R20 for Grand Touring. Since both primary fitments are radial, the main selection factors are matching the proper wheel diameter, maintaining the intended profile, and choosing a tire suited to the way the CX-9 is driven.
A family crossover like the CX-9 benefits from keeping size changes under control, because tire profile can affect ride quality, appearance, and clearance. Owners should also confirm that the vehicle has not been altered with different wheels, suspension changes, or nonstandard tire sizes before choosing a replacement.
How do I choose between the available tires for a 2009 Mazda Trucks CX-9?
Choosing between available tires for a 2009 Mazda Trucks CX-9 begins with fitment, not brand preference. The right tire must match the vehicle's correct size and rim diameter first, whether that is 245/60R18 on Sport and Touring models or 245/50R20 on Grand Touring models.
After size is confirmed, compare the tire's overall character to the way the vehicle is used. A CX-9 that sees regular commuting, family travel, or occasional highway driving may call for a different emphasis than one used lightly, but the correct starting point is always the proper trim-specific size and wheel setup.
Why does wheel setup matter when choosing tires for a 2009 Mazda Trucks CX-9?
Wheel setup matters because the 2009 Mazda Trucks CX-9 was built with two different tire and rim combinations. One uses an 18-inch wheel with 245/60R18 tires, and the other uses a 20-inch wheel with 245/50R20 tires, so the tire choice is tied directly to the wheel on the vehicle.
A replacement tire should never be selected by size code alone without confirming the actual wheels in place. Previous owner changes, aftermarket wheel packages, or trim-level upgrades can leave a CX-9 wearing a different setup than expected, and that can affect profile, clearance, and proper mounting.
Restoration & Appearance
Does correct tire fitment matter for a 2009 Mazda Trucks CX-9 restoration or preservation project?
Yes. Even on a newer collector-era crossover, correct tire fitment helps preserve the vehicle's intended stance, wheel-to-tire proportion, and trim-specific appearance. A 2009 Mazda Trucks CX-9 Grand Touring looks different on its 245/50R20 setup than a Sport or Touring on 245/60R18.
Owners trying to keep the vehicle close to its original presentation should verify both tire size and wheel diameter before replacing anything. That is especially important if the CX-9 has passed through multiple owners, since wheel swaps and nonstandard replacement tires can change the vehicle's look without being obvious at first glance.
Which tire size should I keep for a period-style 2009 Mazda Trucks CX-9?
A period-style 2009 Mazda Trucks CX-9 should keep the tire size that matches its original trim-specific wheel package. That means 245/60R18 for Sport and Touring models and 245/50R20 for Grand Touring models, both in radial construction.
Keeping the correct size helps maintain the CX-9's intended proportions rather than forcing a different visual balance through a taller or lower-profile substitute. If originality of appearance matters, confirm the sub-model, check the actual wheel diameter, and compare the current setup to the vehicle's intended trim-level fitment before making changes.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Mazda Trucks CX-9?
Yes. Modifications can change what fits on a 2009 Mazda Trucks CX-9 even when the original trim-specific sizes are known. Wheel diameter, wheel width, offset, ride height, and suspension changes can all alter clearance and affect whether the current setup still matches the original 245/60R18 or 245/50R20 fitment.
Any CX-9 with aftermarket wheels or suspension work should be measured carefully before replacement tires are chosen. A quick check of wheel size, tire sidewall markings, steering clearance, and space around the fenders helps confirm whether the vehicle still uses the expected setup or needs a more tailored fitment review.
What should I inspect before driving a 2009 Mazda Trucks CX-9 on new tires?
Before driving a 2009 Mazda Trucks CX-9 on new tires, inspect the wheel condition, verify the tire size matches the sub-model, and confirm proper inflation. It is also smart to check for rubbing at full steering lock, especially if the vehicle has different wheels than its original trim-level setup.
A short test drive should include attention to vibration, pull, unusual noise, and any sign of contact with suspension or body components. Rechecking pressure after the first miles and making sure the lug hardware and wheel mounting surfaces are in good condition helps the new tires start out on the right footing.
How often should tires on a 2009 Mazda Trucks CX-9 be inspected?
Tires on a 2009 Mazda Trucks CX-9 should be inspected regularly, not just when tread looks low. Monthly pressure checks, visual inspections for cuts, bulges, cracking, or uneven wear, and a closer look before longer trips are sensible habits for a vehicle that may alternate between daily driving and lighter use.
Age and condition matter as much as tread depth on many older vehicles. A CX-9 that sits for long periods can still develop air loss, flat spotting, or sidewall aging, so keeping the tires clean, properly inflated, and protected from prolonged sun and heat helps preserve both safety and ride quality.
