The 2004 Maserati Spyder pairs Italian grand-touring character with a modern performance-tire layout, so tire selection matters to both appearance and drivability. As an open-top Maserati from the early 2000s, it sits in an era where wheel-and-tire fitment became closely tied to handling balance and seasonal use. This Spyder uses 18-inch radial tires, with staggered 235/40R18 front and 265/35R18 rear fitment in Cambiocorsa and GT summer form, while the GT winter setup shifts the front to 225/40R18. Available choices focus on blackwall performance radials from BFGoodrich and Nitto, making the key decision one of exact front or rear sizing, intended use, and wheel compatibility.
Which Tire Size Is Right for The 2004 Maserati Spyder
The 2004 Maserati Spyder uses three primary tire sizes, all on 18-inch rims, and the right choice depends on whether the tire is going on the front or rear and whether the car is set up with summer or winter fitment. The first step is confirming the exact position and sub-model configuration, because the rear stays at 265/35R18 while front sizing changes between 235/40R18 and 225/40R18.
Fit(s): Cambiocorsa Front and GT (Summer Tires) Front
Construction: Radial|Rim: 18 in
235/40R18 is a metric radial size in which 235 denotes section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. On the 2004 Maserati Spyder, this size serves as a front fitment for Cambiocorsa and GT summer applications, supporting the car's staggered setup. Available choices include BFGoodrich and Nitto blackwall tires across series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This is the size to evaluate when replacing front summer tires while preserving the intended wheel diameter and front-end fitment balance.
265/35R18 is a metric radial size with a 265-millimeter nominal section width, a 35-series profile, and an 18-inch rim diameter. For the 2004 Maserati Spyder, it is the rear tire size across Cambiocorsa, GT summer, and GT winter configurations, making it the constant rear fitment in the range. Product choices come from BFGoodrich and Nitto in blackwall performance series including g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This size matters most when matching the rear tire to the car's staggered layout and confirming that wheel width remains appropriate for a 265-section radial.
225/40R18 is a metric radial size where 225 is the nominal width in millimeters, 40 is the aspect ratio, R indicates radial construction, and 18 matches the wheel diameter. On the 2004 Maserati Spyder, this size is used on the front of GT models equipped with winter tires rather than the wider summer front fitment. BFGoodrich and Nitto both offer blackwall options in this size, including g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. It is the front size to consider when maintaining the GT winter setup and checking that the front wheels match the narrower fitment range.
Sub-model fitment on the 2004 Maserati Spyder is position-specific and, in the GT, season-specific as well. Checking the exact front or rear application matters because the rear size stays consistent while front tire sizing changes between summer and winter setups.
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2004 Maserati Spyder Cambiocorsa Front
The 2004 Maserati Spyder Cambiocorsa Front uses a 235/40R18 radial tire. That makes the front-tire decision centered on replacing the correct staggered summer-style front size and comparing available blackwall performance series within that fitment.
The 2004 Maserati Spyder Cambiocorsa Rear uses a 265/35R18 radial tire. Selecting a rear tire means keeping the staggered rear size intact and confirming that the wheel width and rear clearance suit this wider 18-inch fitment.
The 2004 Maserati Spyder GT (Summer Tires) Front uses a 235/40R18 radial tire. That places it in the same front size as the Cambiocorsa setup, so the main choice becomes tire series and brand within the proper summer front fitment.
The 2004 Maserati Spyder GT (Summer Tires) Rear uses a 265/35R18 radial tire. Rear replacement should stay focused on the correct staggered size while comparing the available blackwall radial options intended for an 18-inch rear wheel.
The 2004 Maserati Spyder GT (Winter Tires) Front uses a 225/40R18 radial tire. That narrower front fitment means the exact GT winter configuration needs to be confirmed before ordering, especially if the car has changed wheels or tires over time.
The 2004 Maserati Spyder GT (Winter Tires) Rear uses a 265/35R18 radial tire. Since the rear size matches the other covered configurations, the priority is choosing the right rear tire series and verifying compatibility with the existing rear wheel setup.
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 2004 Maserati Spyder Tires for Sale
Available 18-inch radial choices for the 2004 Maserati Spyder come from BFGoodrich and Nitto, with blackwall fitments across g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2 series. The main comparisons are front or rear size, tire series, and matching rim-width range.
Common questions for the 2004 Maserati Spyder focus on its staggered 18-inch fitment, front-versus-rear sizing, GT summer and winter differences, and how to compare the available blackwall radial tire choices before road use.
Tire Size & Fitment
What tire size fits a 2004 Maserati Spyder?
The 2004 Maserati Spyder uses three tire sizes, all in radial construction on 18-inch rims: 235/40R18, 265/35R18, and 225/40R18. Cambiocorsa models use 235/40R18 in front and 265/35R18 in the rear. GT models with summer tires use the same 235/40R18 front and 265/35R18 rear combination, while GT winter front fitment changes to 225/40R18 with 265/35R18 remaining at the rear.
The important step is identifying the tire position and the exact GT summer or GT winter setup before choosing a tire. This is a staggered application, so front and rear sizes are not interchangeable, and the narrower 225/40R18 front only applies to the winter front configuration.
What size rim does a 2004 Maserati Spyder use?
Each of the primary tire sizes for the 2004 Maserati Spyder is built around an 18-inch rim diameter. That includes 235/40R18, 265/35R18, and 225/40R18, so wheel diameter stays consistent even though the front tire width changes between some configurations.
Rim diameter is only part of the fitment picture, especially on a staggered performance car. The wheel should also suit the tire's intended rim-width range, and the front or rear position still needs to be confirmed before replacement, particularly if the Spyder has aftermarket wheels or a different seasonal setup than expected.
Why does the 2004 Maserati Spyder have more than one tire size?
The 2004 Maserati Spyder has more than one tire size because it uses a staggered front-and-rear arrangement, and the GT also has a separate winter front fitment. Rear applications stay at 265/35R18, while the front uses either 235/40R18 for Cambiocorsa and GT summer fitment or 225/40R18 for GT winter fitment.
That means the correct replacement depends on more than the model name alone. Tire selection starts with confirming whether the tire is for the front or rear axle and whether the car is set up in summer or winter form, then matching the wheel width and overall vehicle setup to the intended size.
Choosing the Right Tire
What should I consider when choosing a 2004 Maserati Spyder tire?
Start with the exact tire position and size, since the 2004 Maserati Spyder uses a staggered setup and not every front application is the same. The car uses radial tires in 235/40R18, 265/35R18, and, for GT winter front fitment, 225/40R18. After size, compare the available tire series, brand, and the wheel-width range that matches the wheel already on the car.
A useful decision process is to match the tire to how the Spyder is actually driven and configured now, not simply how it left the showroom. A car on original-style wheels may point one way, while a Spyder with replacement wheels or a seasonal tire setup needs closer attention to front and rear compatibility.
What brands offer tires for the 2004 Maserati Spyder?
Tires for the 2004 Maserati Spyder are available from BFGoodrich and Nitto in the applicable 18-inch radial sizes. BFGoodrich offerings include g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, while Nitto options include the NT555 G2 in the covered front and rear sizes.
Brand choice is only one part of the decision. The better comparison is whether the tire is offered in the exact front or rear size needed, whether its rim-width specification suits the wheel on the car, and whether the tire series aligns with the Spyder's intended street, seasonal, or touring use.
What tire series are available for the 2004 Maserati Spyder?
The available tire series for the 2004 Maserati Spyder include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. These appear across the Spyder's applicable 18-inch front and rear radial sizes, giving the buyer several ways to stay within the correct fitment range.
Comparing series is most useful after the correct size has been narrowed down, because the front and rear applications are not interchangeable. Once the proper size is set, look at the tire series alongside rim-width compatibility, load figures where listed, and how the tire matches the way the Spyder is driven and maintained.
Restoration & Appearance
Which tire should I choose for a period-style 2004 Maserati Spyder?
A period-style approach for a 2004 Maserati Spyder starts with preserving the correct staggered 18-inch fitment for the car's actual configuration. That means 235/40R18 front and 265/35R18 rear for Cambiocorsa and GT summer setups, or 225/40R18 front with 265/35R18 rear for the GT winter arrangement. Since the available choices are blackwall radials, the appearance stays in step with the Spyder's modern early-2000s character.
The best visual result usually comes from matching the exact axle position and keeping sidewall proportions consistent with the intended setup. Owners pursuing strict originality may also want to compare tire details against marque references, wheel markings, and historical photos, especially if the car has changed wheels or seasonal equipment over time.
Does correct tire fitment matter for a 2004 Maserati Spyder restoration?
Correct tire fitment matters on a 2004 Maserati Spyder because its stance, wheel-to-fender relationship, and handling balance depend on the proper front and rear sizing. A staggered setup with the wrong front size or the wrong wheel width can change the way the car sits and can alter the overall visual character of the restored car.
Fitment accuracy is especially important when the goal is to present the car as intended for its specific configuration, whether Cambiocorsa, GT summer, or GT winter. Even with modern replacement tires, confirming axle position, wheel dimensions, and seasonal setup helps avoid a finished result that looks or feels mismatched.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 Maserati Spyder?
Yes, modifications can affect tire fitment on a 2004 Maserati Spyder even when the replacement tire matches one of the correct sizes. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering, and body or alignment changes can all influence how a 235/40R18, 225/40R18, or 265/35R18 tire sits on the car.
A Spyder that no longer has its original wheel setup should be measured carefully before tire selection. Tire size alone does not confirm clearance, so it helps to verify wheel diameter, wheel width, front or rear placement, and steering or fender room before mounting a new set.
What should I inspect before driving a 2004 Maserati Spyder on new tires?
Before driving a 2004 Maserati Spyder on new tires, inspect the wheels for damage, confirm the correct front and rear sizes, and check that the tires are seated and inflated properly. It also helps to look over suspension and steering components, since a staggered performance setup depends on stable alignment and predictable clearance.
A short initial road check is wise before any longer trip. Pay attention to vibration, rubbing, unusual steering feel, or uneven visual clearance at full lock, and recheck air pressure after the first drive so the new tires begin service under the right conditions.
How should 2004 Maserati Spyder tires be maintained?
Tires on a 2004 Maserati Spyder should be maintained with regular pressure checks, visual inspections, and close attention to wear across the tread. Because the car uses a staggered arrangement, front and rear tires have different sizes, so maintenance starts with keeping each axle matched correctly and watching for issues such as cracking, cuts, bulges, or slow air loss.
Low-use collector cars can hide tire aging even when tread looks good, so condition matters as much as mileage. Storage away from prolonged sunlight, heat, and ozone sources helps preserve the tires, and periodic checks of alignment and wheel condition help the Spyder's 18-inch radial setup stay consistent on the road.
