2009 Maserati Tire Fitment Guide

2009 Maserati vehicles use nine sizes across the GranTurismo and Quattroporte ranges: 245/35R20, 245/40R19, 285/35R20, 285/40R19, 245/45R18, 285/35R19, 285/40R18, 285/30R20, and 295/30R20. The GranTurismo uses 245/40R19 with 285/40R19 or 245/35R20 with 285/35R20, while the Quattroporte uses 245/45R18 with 285/40R18, 245/40R19 with 285/35R19, or 245/35R20 with either 285/30R20 or 295/30R20 depending on wheel package.

The practical takeaway is that year and make alone are not enough for a correct choice on 2009 Maserati. You need the model first, then the wheel diameter, then the matching front and rear pair. Rim width guidance is available for several of these sizes as well, so if the car has aftermarket wheels or a changed package, confirm the actual wheel before settling on a tire.

On a 2009 Maserati, 245/35R20 is a metric radial size. The 245 is the nominal section width in millimeters, 35 is the aspect ratio, meaning the sidewall height is 35 percent of the section width, R identifies radial construction, and 20 is the wheel diameter in inches. On 2009 Maserati applications, that size appears as a shared front fitment for both GranTurismo and Quattroporte when equipped with a 20-inch package.

That decoding matters because a 245/35R20 is not interchangeable with the 245/40R19 or 245/45R18 sizes also found on 2009 Maserati. Even though the front width begins with the same 245 in several fitments, the profile and wheel diameter change the overall package. Match the full size code, not just the width, and pair it with the correct rear size for the model.

No, 2009 Maserati models do not use the same complete tire size package. The GranTurismo and Quattroporte share two front sizes, 245/35R20 and 245/40R19, but their rear sizes differ, and the Quattroporte adds unique 18-inch and wider 20-inch combinations that the GranTurismo does not use. That means there is overlap within the year, but not a single fitment that covers every car.

For buyers, that makes model identification essential before comparing products. A GranTurismo owner looking at a Quattroporte rear size may end up with the wrong wheel diameter or wrong rear width, even if the tire appears close on paper. Confirm the exact model and whether the car wears 18-, 19-, or 20-inch wheels before narrowing your options.

2009 Maserati tire choices are mostly blackwall, which is the dominant appearance across 245/35R20, 245/40R19, and 245/45R18. Some rear-oriented sizes add more visual variety: 285/35R20 and 285/35R19 are available in blackwall and raised white letter form, while 285/40R18 and 285/30R20 also appear with redline sidewalls. That creates a broader cosmetic spread than many modern exotic owners expect.

A blackwall look is the most natural visual match for a 2009 Maserati, especially on cars kept close to factory appearance. Raised white letters and redlines are more of a custom statement than an OEM-style presentation on a contemporary Maserati coupe or sedan. If appearance matters as much as fitment, choose sidewall style only after the correct size and wheel package are confirmed.

BFGoodrich, Nitto, and Pro-Trac cover the available 2009 Maserati sizes that currently have product support. BFGoodrich appears heavily in the shared front sizes and several rear applications, Nitto covers multiple front and rear fitments in blackwall radial form, and Pro-Trac appears in selected rear sizes with blackwall, raised white letter, and redline sidewall options. Brand coverage varies by size rather than staying identical across the whole year and make.

That means your preferred brand may be available in one wheel package but not another. A Quattroporte on 18-inch wheels has a different brand mix than a GranTurismo on 20s, and some rear sizes carry the widest sidewall-style variety. Start by confirming the exact size, then compare the brands that actually serve that specific fitment instead of assuming every Maserati size has the same choices.

Within 245/45R18 for a 2009 Maserati, BFGoodrich and Nitto share the same 18-inch rim diameter and blackwall radial construction, but there are differences in load and weight details. BFGoodrich versions appear with W and Y speed ratings depending on series, and some carry load figures up to 1,764 pounds at 50 psi. Nitto’s NT555 G2 in this size is a W-rated XL tire with a 1,764-pound load figure at 50 psi and a published weight around 27.37 pounds.

The useful comparison is less about fitment and more about the character of the specific tire line you prefer once the Quattroporte’s 18-inch package is confirmed. Since both brands fit similar rim-width ranges in this size, the deciding factors often become tread style, speed rating, and whether you want the look and feel of one series over another. Compare the exact series, not just the brand name.

Several 2009 Maserati sizes include published rim-width ranges. 245/35R20 and 245/40R19 fit 8.0 to 9.5-inch rims, 245/45R18 fits 7.5 to 9.0-inch rims, 285/35R20 fits 9.5 to 11.0-inch rims, 285/35R19 appears on 9.5 to 11.0-inch rims with one version also calling out 9.50 to 10.00 inches, and 285/40R18 fits 9.5 to 11.0-inch rims. Those figures reflect tire-specific wheel compatibility, not a blanket rule for every Maserati wheel.

Use the published wheel width as a check against the actual wheel on the car, especially if the car has aftermarket rims or a previous owner changed wheel packages. The same front width can appear on different rim diameters across 2009 Maserati, so width and diameter both matter. If the wheel sits near the edge of the acceptable range, compare the exact tire you want rather than assuming another product in the same size is identical.

The available 2009 Maserati products are modern radial tires, and where tube status appears explicitly, tubeless construction is present. Some sizes include a TL marking, while many others do not carry a tube marker in the size description at all. That means the safe reading is that tube requirements can vary by product marking and wheel design, not by year and make alone.

On a 2009 Maserati with original modern wheels, tubeless fitment is the expectation, but the correct step is to confirm the sidewall marking on the exact tire and make sure the wheel itself is suitable for tubeless service. If the car has non-original wheels or any wheel damage, verify bead-seat condition and valve-stem condition before mounting the tire. Treat the wheel and tire as a matched system.

No single original 2009 Maserati wheel works with all nine sizes because the year spans 18-, 19-, and 20-inch fitments across two different models. A 20-inch front tire such as 245/35R20 cannot be used on a 19-inch or 18-inch wheel, and the rear sizes also vary by both diameter and width. The overlap in some front sizes between GranTurismo and Quattroporte does not turn the whole tire package into a universal Maserati fitment.

Original wheels can be retained when the tire size matches the wheel diameter and falls within the proper rim-width range for that specific tire. That is especially important on staggered setups, where the front and rear wheels are intentionally different. Before changing sizes, verify the wheel diameter cast into the wheel and compare it with the full tire code rather than relying on appearance alone.

A 2009 Maserati stores best in a cool, dry, dark garage with the tires kept away from direct sunlight, electric motors, battery chargers, and other ozone sources. Keep the tires inflated to the pressure appropriate for the tire and vehicle, and move the car periodically if it sits for long stretches. Modern radials resist flat-spotting better than older bias-ply tires, but they still age faster when parked under load for months at a time.

If the car will sit seasonally, wash the tires, avoid petroleum-based dressings, and consider rolling the car occasionally or supporting it in a way that reduces long static loading. Storage habits matter as much on a low-mileage exotic as on a high-mileage daily driver because age, heat, and ozone attack rubber regardless of tread depth. A car that looks pristine can still have tires that have aged out.

Tires on a 2009 Maserati should be judged more by age and condition than by mileage alone. A good working rule is to inspect them closely once they reach five to seven years of age and to treat ten years as a strong replacement point even if tread remains. The DOT date code on the sidewall tells you the tire’s production week and year, which is essential on collector-driven or lightly used cars.

That matters because many performance-oriented cars cover surprisingly few miles while their tires quietly harden, crack, or lose wet-weather grip with age. A Quattroporte or GranTurismo that sees weekend use may still need replacement long before the tread is worn out. If the tires are several years old, age should weigh just as heavily as brand or tread pattern in your decision.

Tires on a 2009 Maserati deserve a visual inspection before every drive and a more thorough check before any longer outing. Look for sidewall cracking, tread separation, punctures, uneven wear, bulges, and pressure loss, paying special attention to the inside shoulders on low-profile staggered fitments. High-performance sizes can hide problems if the car sits often or if alignment has drifted out of spec.

A quick walkaround catches issues that become expensive or dangerous once speed and heat build on the road. Include the spare if the car carries one, and inspect valve stems whenever the wheels are off. On a modern exotic, tires are part of the overall health check along with brakes, fluids, and suspension, not something to revisit only at annual service time.

Yes, the available 2009 Maserati tire options are modern radial designs, and the speed ratings that appear include W, Y, and ZR-marked performance sizes. W-rated tires are rated to 168 mph, while Y-rated tires are rated to 186 mph or more. Those figures exceed normal U.S. highway use by a wide margin, so the tire’s roadworthiness in everyday driving depends at least as much on age, inflation, alignment, and condition as on the speed symbol itself.

A sound GranTurismo or Quattroporte on fresh, properly inflated tires is well suited to sustained highway travel, but an aged tire with plenty of tread can still be the weak link. On a 2009 Maserati, the vehicle’s own weight, suspension condition, and braking health matter just as much as the printed speed rating. Choose a tire in the correct size first, then make sure the rest of the car is equally ready for the road.

Inflation pressure on a 2009 Maserati should follow the car’s factory recommendation for its exact wheel and tire package, then be checked against the tire manufacturer’s maximum load-and-pressure information for the specific tire. Some available sizes carry published maximum figures such as 1,521 pounds at 50 psi for certain 245/35R20 tires, 1,653 pounds at 50 psi for some 245/40R19 tires, 1,764 pounds at 50 psi for certain 245/45R18 tires, 1,930 pounds at 50 psi for some 285/35R19 tires, and 2,039 pounds at 50 psi for certain 285/40R18 tires.

Those numbers are not a universal operating pressure for every Maserati tire size. They show the pressure associated with that tire’s maximum rated load, not the front and rear settings Maserati intended for normal road use. Use the door-jamb or owner’s manual recommendation for the car’s actual package, then adjust only within the tire maker’s limits and with careful attention to ride, wear, and handling.

Before a longer drive in a 2009 Maserati, inspect all four tires for cracks, punctures, bulges, feathered wear, and any sign of impact damage on the sidewall. Confirm cold pressures, verify tread depth across the full width of the tire, and make sure the valve stems are sound and not weather-checked. On staggered setups, also confirm that front and rear sizes have not been mixed incorrectly after previous service.

That tire check should sit alongside a broader pre-drive inspection of brakes, fluids, battery condition, and suspension because a modern Maserati still asks a lot of its chassis on a fast highway run. If the car has been sitting, drive the first few miles with extra attention to vibration or pull. A small issue at garage speed becomes much more serious once heat and speed build into the tire.