The 2006 Infiniti M35 sits in the middle of Infiniti’s rear-drive luxury sport sedan era, blending V6 power, sharp styling, and a chassis tuned for a more athletic feel than many midsize premium sedans of its time. That balance matters when choosing tires, because this car uses modern radial fitments and the correct size depends on whether it is a Base, Sport, or X model. The main fitment decision centers on 245/45R18 versus 245/40R19, both with blackwall performance-oriented tire choices from BFGoodrich and Nitto. Getting the right size starts with confirming the exact sub-model and wheel diameter already on the car.
Which Tire Size Is Right for The 2006 Infiniti M35
The 2006 Infiniti M35 uses two primary tire sizes, and the correct one depends on the sub-model and wheel diameter. Base and X models use 245/45R18 on an 18-inch rim, while the Sport model uses 245/40R19 on a 19-inch rim. Before comparing tires, confirm whether the car is a Base, Sport, or X and verify that the wheels on the car still match that original rim diameter.
A 245/45R18 tire uses a 245-millimeter section width, a 45-series aspect ratio, radial construction, and fits an 18-inch wheel. On the 2006 Infiniti M35, this is the primary size for Base and X models, making it the standard fitment path for those configurations. Available choices include BFGoodrich and Nitto options in performance-oriented series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2, all in blackwall styling. This size is the right place to start when the car retains its 18-inch wheel setup and the goal is proper sub-model-specific fitment.
A 245/40R19 tire keeps the same 245-millimeter nominal width but uses a shorter 40-series profile on a 19-inch wheel. On the 2006 Infiniti M35, this size belongs to the Sport model and should be treated as a distinct fitment rather than an interchangeable alternate for every M35. BFGoodrich offers this size in several blackwall performance series, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. This fitment is the one to evaluate when the car is a true Sport model or when its 19-inch wheel package has been confirmed.
Sub-model fitment matters on the 2006 Infiniti M35 because tire size changes with the wheel package. Base and X models share one size, while the Sport model moves to a different radial fitment on a larger rim, so identifying the exact version of the car comes first.
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2006 Infiniti M35 Base
The 2006 Infiniti M35 Base uses the 245/45R18 radial fitment. Tire selection for this sub-model is mainly about choosing among the available blackwall performance tire series while keeping the 18-inch wheel setup and overall fitment consistent.
The 2006 Infiniti M35 Sport uses the 245/40R19 radial size on a 19-inch rim. That makes wheel confirmation especially important, since this sub-model’s tire choice should be matched to the Sport wheel diameter before comparing brands or tire series.
The 2006 Infiniti M35 X uses the same 245/45R18 radial size as the Base model. For this version, the decision is less about size variation and more about selecting the tire series, brand, and rim-width compatibility that suit the car’s current 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 2006 Infiniti M35 Tires for Sale
Available 2006 Infiniti M35 tire choices focus on 245/45R18 and 245/40R19 radial performance tires from BFGoodrich and Nitto. The product grid mainly separates options by tire series, blackwall styling, load specification, and rim-width compatibility within the correct sub-model fitment.
These FAQs address the main tire questions for the 2006 Infiniti M35, including size by sub-model, wheel diameter, product selection, and the fitment checks that matter before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2006 Infiniti M35?
The 2006 Infiniti M35 uses two tire sizes depending on sub-model. The Base and M35 X use 245/45R18 radial tires, while the M35 Sport uses 245/40R19 radial tires. Those sizes share a similar overall diameter, but they are tied to different wheel diameters and should be matched to the correct version of the car.
The first thing to verify is the exact sub-model and the actual wheels currently installed on the car. If the M35 has been fitted with different wheels over the years, the original sub-model alone may not tell the whole story, so checking the wheel diameter before selecting tires helps avoid ordering the wrong fitment.
What size rim does a 2006 Infiniti M35 use?
A 2006 Infiniti M35 uses either an 18-inch or 19-inch rim, depending on sub-model. Base and X models use an 18-inch rim with 245/45R18 tires, while the Sport model uses a 19-inch rim with 245/40R19 tires. Both are radial fitments, but the wheel diameter is not the same across the lineup.
Wheel diameter should be confirmed before comparing tire options, especially on a used luxury sedan that may have seen wheel changes. Looking at the existing tire sidewall and measuring the wheel if needed is a simple way to confirm whether the car still has its original 18-inch or 19-inch setup.
Do all 2006 Infiniti M35 sub-models use the same tire size?
No, the 2006 Infiniti M35 does not use one tire size across every sub-model. The Base and X models share 245/45R18, while the Sport model uses 245/40R19. That means tire selection is straightforward once the exact sub-model is known, but the correct size still depends on the car’s wheel package.
This difference matters because a tire built for an 18-inch rim cannot be mounted on a 19-inch wheel, even if the section width looks similar. On a car that has been modified or fitted with replacement wheels, checking the current wheel diameter is just as important as checking the trim badge.
Choosing the Right Tire
What should I consider when choosing a 245/45R18 tire for a 2006 Infiniti M35?
Start with the correct fitment: 245/45R18 is the size used on the 2006 Infiniti M35 Base and M35 X. From there, compare radial construction details such as rim-width compatibility, load specification where shown, and the available tire series, including BFGoodrich g-Force options and the Nitto NT555 G2, all offered in blackwall form.
The practical choice depends on how the car is driven and how closely the current wheel setup matches the tire’s approved rim-width range. It also helps to compare whether the tire is aimed more toward all-season street use or a more performance-focused presentation, while staying within the proper 18-inch fitment for the car.
What brands offer tires for the 2006 Infiniti M35?
Tires for the 2006 Infiniti M35 are available from BFGoodrich and Nitto in the sizes used on this model range. BFGoodrich appears in both 18-inch and 19-inch fitments through several g-Force series, while Nitto is available in the 245/45R18 size with the NT555 G2. All of these options are radial blackwall tires.
Brand selection is only one part of the decision. It still makes sense to compare the exact size needed for the car, the tire series offered in that size, and the wheel-width range that matches the wheels already installed. That approach keeps the choice focused on fitment and intended use instead of brand name alone.
What tire series are available for the 2006 Infiniti M35?
The 2006 Infiniti M35 is served by several performance-oriented tire series depending on size. In 245/45R18, available series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Nitto NT555 G2. In 245/40R19, BFGoodrich options include g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A.
Comparing tire series helps separate the choices once the correct size is settled, especially if the car is used as a daily driver, a weekend sedan, or a more enthusiast-focused street car. The key is to compare series within the proper wheel diameter and sub-model fitment rather than treating all available M35 tires as interchangeable.
Restoration & Appearance
Which tire should I choose for a period-style 2006 Infiniti M35?
A period-style approach for a 2006 Infiniti M35 starts with keeping the correct original-size format for the sub-model. That means 245/45R18 for Base and X models or 245/40R19 for the Sport, both in modern radial construction. Staying with the correct wheel diameter and size profile does more for the car’s intended look than changing to a loosely similar alternate fitment.
Because the available options are blackwall performance tires, the appearance decision is more about preserving the right stance and wheel relationship than choosing among vintage-style sidewall treatments. On a cleaner, well-kept M35, matching the proper size to the original sub-model usually gives the most cohesive presentation.
Does correct tire fitment matter for a 2006 Infiniti M35 restoration or preservation project?
Yes, correct tire fitment matters on a 2006 Infiniti M35 because the car’s stance, wheel-to-body proportion, and overall presentation depend on using the right size for the sub-model. A Base or X on 245/45R18 and a Sport on 245/40R19 keep the visual balance intended for each wheel package, even though both use the same nominal section width.
That matters just as much on a preservation-minded modern luxury sedan as it does on an older collector car. Owners trying to keep the car true to its original character should verify the wheel diameter already on the vehicle and avoid assuming that any 245-width tire will preserve the same appearance.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2006 Infiniti M35?
Yes, modifications can affect tire fitment on a 2006 Infiniti M35 even when the tire size seems close to stock. Aftermarket wheels, changes in wheel width, offset differences, suspension lowering, or body modifications can all change how a 245/45R18 or 245/40R19 tire sits in the wheel opening and how much clearance remains during steering and suspension travel.
That is why the current setup should be checked before replacing tires on a used or modified car. Confirm the actual wheel diameter, compare the wheel width to the tire’s approved range, and look at fender, strut, and inner-liner clearance so the new tires match the car as it sits now.
What should I inspect before driving a 2006 Infiniti M35 on new tires?
Before driving a 2006 Infiniti M35 on new tires, inspect the wheels for damage, confirm lug hardware condition, and make sure the installed tire size matches the correct sub-model and rim diameter. It also helps to check alignment condition, since uneven wear or a steering pull can shorten tire life quickly on a performance-oriented luxury sedan.
A close look at suspension wear items is worthwhile as well, especially on an older car that may have seen years of mixed use. Tire pressure should be set properly, and the first drives should include a quick clearance check at full steering lock so rubbing or interference can be caught early.
How often should tires on a 2006 Infiniti M35 be inspected?
Tires on a 2006 Infiniti M35 should be inspected regularly, not just when tread looks low. A monthly check is a sensible routine for pressure, visible damage, and uneven wear, and any vibration, pull, or sudden air loss deserves immediate attention. That matters on this car because the correct fitment depends on maintaining the intended 18-inch or 19-inch wheel setup.
Inspection should include tread depth, sidewall condition, cuts, bulges, and signs of aging, especially if the car spends long periods parked. Even a low-mileage M35 can develop tire issues over time, so routine checks help catch problems before they affect ride quality, handling, or road-use safety.
