The 2008 Infiniti M35 sits in the era when sport-luxury sedans were expected to balance strong road manners, sharp styling, and everyday refinement. Its tire fitment reflects that split personality, with one size for the Luxury and M35 X models and a lower-profile 19-inch setup for the Sport. This car uses radial tires only, with 245/45R18 and 245/40R19 fitments tied to specific sub-models. Available choices focus on modern performance-oriented blackwall radials from BFGoodrich and Nitto across several series. The key is matching the exact sub-model and wheel diameter first, then choosing the tire character that best suits comfort, handling, and overall presentation.
Which Tire Size Is Right for The 2008 Infiniti M35
Two tire sizes apply to the 2008 Infiniti M35, and the right one depends on the exact sub-model and wheel diameter. The Luxury and M35 X use 245/45R18 on an 18-inch rim, while the Sport uses 245/40R19 on a 19-inch rim. Before comparing brands or tire series, confirm whether the car has its original wheel package or a changed wheel setup.
245/45R18 is a metric radial size in which 245 identifies the nominal section width in millimeters, 45 is the aspect ratio, R marks radial construction, and 18 is the rim diameter in inches. On the 2008 Infiniti M35, this size serves the Luxury and M35 X models and keeps the fitment tied to an 18-inch wheel. Available choices include BFGoodrich and Nitto blackwall tires in 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 the car retains the 18-inch package and the goal is to compare road-focused radial options within that setup.
245/40R19 is a metric radial size with the same nominal 245-millimeter section width, but the 40-series profile and 19-inch rim requirement create a distinct fitment from the 18-inch version. On the 2008 Infiniti M35, this size applies to the Sport model and should be matched to a true 19-inch wheel. Available products center on BFGoodrich blackwall radials, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. This is the right size to review when preserving the Sport wheel package or confirming that a car still carries the proper 19-inch setup.
Sub-model fitment matters on the 2008 Infiniti M35 because tire size changes with the wheel package. The Luxury and M35 X share one size, while the Sport uses a different 19-inch fitment, so identifying the exact model is the first step before comparing tire choices.
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2008 Infiniti M35 Luxury
The 2008 Infiniti M35 Luxury uses the 245/45R18 radial tire size on an 18-inch wheel. That keeps the decision centered on choosing among the available blackwall performance-oriented radial options rather than sorting through multiple primary sizes.
The 2008 Infiniti M35 Sport uses the 245/40R19 radial size, which is tied to the Sport model’s 19-inch wheel fitment. Tire selection starts with confirming that wheel diameter, then comparing the available BFGoodrich series within the correct size.
The 2008 Infiniti M35 X uses the 245/45R18 radial tire size shared with the Luxury model. That makes product choice more about tire series, rim-width compatibility, and intended road feel than about sorting through different primary fitments.
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 2008 Infiniti M35 Tires for Sale
Available 2008 Infiniti M35 tires focus on 245/45R18 and 245/40R19 blackwall radials from BFGoodrich and Nitto. The product grid is where to compare tire series, construction details, and rim-width compatibility within the correct sub-model size.
Owners of a 2008 Infiniti M35 usually need to sort out the exact tire size by sub-model first, then compare wheel diameter, tire series, and maintenance considerations for regular road use.
Tire Size & Fitment
What tire size fits a 2008 Infiniti M35?
A 2008 Infiniti M35 uses either 245/45R18 or 245/40R19, depending on the sub-model. The Luxury and M35 X use 245/45R18 radial tires, while the Sport uses 245/40R19 radial tires. Both are metric radial sizes, but they are tied to different wheel diameters and should not be treated as the same fitment choice.
The most important next step is confirming the exact sub-model and checking the actual wheels on the car. A used M35 may have replacement wheels or a changed tire package, so matching the tire to the vehicle’s current rim diameter is just as important as matching the badge on the trunk.
What size rim does a 2008 Infiniti M35 use?
A 2008 Infiniti M35 uses either an 18-inch or 19-inch rim, depending on the sub-model. The Luxury and M35 X are paired with 245/45R18 tires on 18-inch wheels, while the Sport uses 245/40R19 tires on 19-inch wheels. The tire size itself confirms the intended rim diameter because the last number in each size is the wheel size in inches.
Wheel diameter should be verified before ordering tires, especially on a car that may have seen aftermarket changes. Once the diameter is confirmed, rim-width compatibility becomes the next check, since the available 18-inch and 19-inch products are designed around specific wheel-width ranges within their respective sizes.
Do all 2008 Infiniti M35 sub-models use the same tire size?
No, 2008 Infiniti M35 sub-models do not all use the same tire size. The Luxury and M35 X share 245/45R18, while the Sport uses 245/40R19. All three use radial construction, but the Sport’s fitment is built around a different wheel diameter and lower-profile tire than the other two versions.
That distinction matters because a tire search by model year alone can miss the Sport-specific 19-inch setup. Identifying the exact sub-model helps narrow the correct tire size immediately, and it also reduces the chance of choosing a tire that matches the brand or series you want but not the wheel package on the car.
Choosing the Right Tire
What should I consider when choosing a 245/45R18 tire for a 2008 Infiniti M35?
Choosing a 245/45R18 tire for a 2008 Infiniti M35 starts with confirming that the car is a Luxury or M35 X, or that it currently runs the proper 18-inch wheel setup. Available options in this size are radial blackwall tires from BFGoodrich and Nitto, with several performance-oriented series available for comparison.
After the size is confirmed, compare the tire series and the wheel-width specifications for the tire you are considering. It also helps to look at load figures where they are stated, along with the intended use of the car, whether that means regular street driving, more spirited road use, or simply keeping a clean modern sport-sedan appearance.
What brands offer tires for the 2008 Infiniti M35?
Tires for the 2008 Infiniti M35 are available from BFGoodrich and Nitto in the sizes used on this vehicle. BFGoodrich appears in both 245/45R18 and 245/40R19 fitments, while Nitto is available in 245/45R18. The available products are all radial blackwall tires aimed at modern road use rather than vintage-style presentation.
Brand choice should still come after the fitment basics are confirmed. Once the correct size and wheel diameter are settled, compare each brand’s available series, wheel-width range, and any stated load figures to make sure the tire suits the way the car is driven and the wheel package actually installed on it.
What tire series are available for the 2008 Infiniti M35?
The 2008 Infiniti M35 is served by several tire series, including BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. These series appear across the 245/45R18 and 245/40R19 fitments, though the exact availability depends on which sub-model and wheel diameter the car uses.
Series choice matters because it helps separate the available tires by intended character without changing the basic fitment. A good comparison starts with the exact size for the car, then narrows by brand, series, and wheel-width compatibility so the tire selected matches both the vehicle setup and the owner’s driving priorities.
Restoration & Appearance
Which tire should I choose for a period-style 2008 Infiniti M35?
A period-style approach for a 2008 Infiniti M35 begins with keeping the correct size for the sub-model and retaining the proper wheel diameter. That means 245/45R18 for the Luxury and M35 X or 245/40R19 for the Sport. Since the available products are modern blackwall radials, the appearance stays faithful to the car’s original era rather than trying to mimic an older design language.
The cleaner choice usually comes from preserving the intended wheel-and-tire proportion for the specific model rather than forcing a different size. An M35 that still carries its original-style wheel package will generally look more consistent when the replacement tire follows that same basic fitment and avoids unnecessary changes in profile or rim diameter.
Does correct tire fitment matter for a 2008 Infiniti M35 restoration?
Yes, correct tire fitment matters on a 2008 Infiniti M35 restoration because the tire size helps preserve the car’s stance, wheel-to-body proportion, and intended road presence. The main distinction is between the 18-inch fitment used on the Luxury and M35 X and the 19-inch fitment used on the Sport, so restoration work should start with that sub-model-specific difference.
A visually tidy restoration can be undermined by the wrong wheel diameter even if the tire brand is excellent. It is worth checking the actual wheels on the car, comparing them to the sub-model, and using that information to choose a replacement tire that supports the correct overall look instead of merely matching a close numerical size.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Infiniti M35?
Yes, modifications can affect tire fitment on a 2008 Infiniti M35 even when the tire size looks close to stock. Aftermarket wheels, suspension changes, altered ride height, or body modifications can change the clearance available for a 245/45R18 or 245/40R19 tire. Wheel width can also matter because the available tires are built around specific rim-width ranges.
A car with non-original wheels should be checked at the wheel itself, not just by model year and trim. Measuring the actual rim diameter and width, then checking steering and fender clearance at full lock and full suspension travel, helps avoid choosing a tire that matches the catalog size but not the vehicle’s present setup.
What should I inspect before driving a 2008 Infiniti M35 on new tires?
Before driving a 2008 Infiniti M35 on new tires, inspect the wheels for correct diameter and condition, verify proper inflation, and make sure the new tires match the sub-model’s required size. It is also smart to check for uneven old tire wear, since that can point to alignment or suspension issues that may shorten the life of the replacement tires.
A quick road-use inspection should also include looking at brake clearance, steering response, and any signs of rubbing once the car is back on the ground. Catching a wheel or suspension problem early is especially useful on a sport-luxury sedan like the M35, where tire profile and wheel package play a big role in how the car feels on the road.
How often should tires on a 2008 Infiniti M35 be inspected?
Tires on a 2008 Infiniti M35 should be inspected regularly, not just when tread looks worn. A monthly pressure and condition check is a sensible routine, along with a closer inspection before longer drives. Look for cracking, cuts, bulges, uneven tread wear, and slow air loss, especially if the car sits for extended periods or is driven only occasionally.
Regular inspection matters because both M35 tire sizes use lower-profile radial designs that can react noticeably to pressure loss or wheel damage. It also helps to keep an eye on alignment-related wear patterns, since catching shoulder wear or cupping early can protect both ride quality and tire life before the problem becomes more expensive to correct.
