The 2009 Acura TL marked a more assertive chapter for Acura’s midsize luxury sport sedan, with sharper styling and a chassis setup that leaned more seriously into performance. It sits in an era where wheel and tire choice became a visible part of the car’s character, especially as trim differences brought larger factory wheel packages into play. The 2009 Acura TL uses radial tire fitments in 245/50R17, 245/45R18, or 245/40R19 depending on sub-model. Available choices center on modern blackwall performance-oriented tires from BFGoodrich and Nitto. For this car, the key step is matching the exact sub-model and wheel diameter before comparing series, load specifications, and overall driving intent.
Which Tire Size Is Right for The 2009 Acura TL
Three tire sizes apply to the 2009 Acura TL, and the right one depends on the exact sub-model and wheel diameter. The Base uses a 17-inch fitment, SH-AWD uses an 18-inch fitment, and SH-AWD w/Tech Pkg. may use either 18-inch or 19-inch wheels. Before comparing tire choices, confirm the sub-model and check the actual wheel diameter currently on the car, especially if wheels may have been changed over time.
A 245/50R17 tire uses a 245-millimeter section width, a 50-series aspect ratio, radial construction, and a 17-inch rim diameter. On the 2009 Acura TL, this size serves the Base model and reflects a modern metric radial format familiar to current replacement buyers. Its proportions balance sidewall height and wheel size in a way that suits a luxury sport sedan without moving to the larger-diameter packages used on other TL variants. This is the size to focus on when the car retains its 17-inch wheel setup and stock-style fitment is the goal.
A 245/45R18 tire keeps the same 245-millimeter section width but uses a shorter 45-series sidewall on an 18-inch rim. On the 2009 Acura TL, this size applies to SH-AWD models and also appears on some SH-AWD w/Tech Pkg. cars, so it is a shared fitment within the all-wheel-drive range. Available choices include BFGoodrich and Nitto blackwall tires across several performance-oriented series, with rim-width specifications commonly spanning the mid-7-inch to 9-inch range. This size is the right place to compare product character once the car’s 18-inch wheels are confirmed.
A 245/40R19 tire again uses a 245-millimeter section width, but the lower 40-series profile pairs with a 19-inch rim. On the 2009 Acura TL, this size is associated with the SH-AWD w/Tech Pkg. configuration, making wheel diameter confirmation especially important before ordering. BFGoodrich offers this fitment in multiple g-Force series, all in blackwall form, with rim-width compatibility extending into wider 19-inch wheel applications. This size is most relevant when the car carries the larger factory-style wheel package and the buyer wants to compare performance-focused radial options within that setup.
Tire fitment on the 2009 Acura TL varies by sub-model, so identifying the exact version of the car matters before choosing a replacement tire. Wheel diameter is part of that decision, since the covered fitments span 17-inch, 18-inch, and 19-inch applications.
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2009 Acura TL Base
The 2009 Acura TL Base uses a single 245/50R17 radial fitment. For this sub-model, tire selection is mainly about staying with the correct 17-inch size and then comparing available tire lines if the car still carries its original-style wheel diameter.
The 2009 Acura TL SH-AWD uses 245/45R18 radial tires. That makes the buying process fairly straightforward once the 18-inch wheel setup is confirmed, with the main choices shifting to brand, tire series, and other product-level specifications.
The 2009 Acura TL SH-AWD w/Tech Pkg. may use either 245/45R18 or 245/40R19 radial tires. This sub-model calls for a wheel-diameter check first, since tire selection changes completely depending on whether the car is wearing the 18-inch or 19-inch 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 2009 Acura TL Tires for Sale
Available 2009 Acura TL tire choices center on 18-inch and 19-inch radial fitments from BFGoodrich and Nitto. The product grid is mainly a comparison of performance-oriented series, blackwall styling, rim-width compatibility, load specifications, and other differences within the correct size.
These FAQs focus on the exact tire sizes used on the 2009 Acura TL, how fitment changes by sub-model, and what to check when comparing wheel diameter, tire series, and road-use readiness.
Tire Size & Fitment
What tire size fits a 2009 Acura TL?
The 2009 Acura TL uses three possible tire sizes: 245/50R17, 245/45R18, and 245/40R19. The Base model uses 245/50R17, the SH-AWD uses 245/45R18, and the SH-AWD w/Tech Pkg. may use either 245/45R18 or 245/40R19 depending on its wheel setup.
That means the first step is not choosing a brand or tire series, but confirming the exact sub-model and the wheel diameter currently on the car. A TL that has changed hands over the years may also have aftermarket wheels, so the tire size should always be matched to the actual rim before moving forward.
What size rim does a 2009 Acura TL use?
The 2009 Acura TL uses 17-inch, 18-inch, or 19-inch rims depending on configuration. The Base model is paired with a 17-inch fitment, the SH-AWD uses an 18-inch fitment, and the SH-AWD w/Tech Pkg. can be associated with either 18-inch or 19-inch wheels.
Rim diameter is the most important fitment check on this car because each tire size is tied to a specific wheel diameter. Reading the current tire sidewall or measuring the wheel is a smart step before ordering, especially on a used TL where wheel changes may have altered the original setup.
Why does the 2009 Acura TL have more than one tire size?
The 2009 Acura TL has more than one tire size because tire fitment changes with sub-model and wheel package. Acura used different wheel diameters across the Base, SH-AWD, and SH-AWD w/Tech Pkg. versions, which is why the sizes move from 245/50R17 to 245/45R18 and 245/40R19.
Even though those sizes stay close in overall diameter, they are not interchangeable by assumption because the rim diameter changes from one fitment to the next. The practical takeaway is simple: identify the exact TL version, verify the wheel diameter on the car, and then compare tire choices only within that matching size.
Choosing the Right Tire
What should I consider when choosing a 245/45R18 tire for a 2009 Acura TL?
Start with the basics: the tire must be the correct 245/45R18 size for an SH-AWD or an SH-AWD w/Tech Pkg. running 18-inch wheels. From there, the meaningful differences are tire series, load specifications, rim-width compatibility, and whether the tire’s overall character suits how the car is driven.
This size includes options from BFGoodrich and Nitto, all in blackwall form, so the decision is less about appearance variety and more about matching the product to the car’s wheel width and intended use. Checking the current wheel width before comparing models is a smart step, especially if the TL no longer has its original wheels.
What brands offer tires for the 2009 Acura TL?
Available tires for covered 2009 Acura TL fitments come from BFGoodrich and Nitto. Within the 18-inch and 19-inch sizes, BFGoodrich appears across several g-Force series and the g-Force Phenom T/A line, while Nitto is represented by the NT555 G2 in the 245/45R18 fitment.
Brand alone should not decide the purchase. The more useful approach is to confirm the car’s exact size first, then compare the available tires by series, load information where stated, rim-width range, and how the car is actually used. That keeps the choice grounded in fitment rather than simply in name recognition.
What tire series are available for the 2009 Acura TL?
The 2009 Acura TL fitments shown here include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and the Nitto NT555 G2. These series appear in the 245/45R18 and 245/40R19 sizes used on SH-AWD-based configurations.
Series names help separate one tire from another when several products share the same basic size. Once the correct wheel diameter is confirmed, comparing by series can help narrow the field alongside other details such as load capacity, supported rim width, and whether the car is used primarily for everyday road driving or more aggressive performance-oriented use.
Restoration & Appearance
Which tire should I choose for a period-style 2009 Acura TL?
A period-style 2009 Acura TL tire choice starts with retaining the correct original-type sizing format for the car’s wheel package: 245/50R17, 245/45R18, or 245/40R19, depending on sub-model. Since these are all modern radial fitments, the most authentic-looking approach is usually to stay with the proper size and wheel diameter rather than changing the profile.
Appearance on this generation of TL is shaped more by wheel size and sidewall proportion than by vintage-style sidewall treatments. Because the available products here are blackwall tires, the main restoration-minded decision is preserving the car’s intended stance and fitment. On a car with changed wheels, returning to the proper diameter often matters as much as the tire brand.
Does correct tire fitment matter for a 2009 Acura TL restoration?
Correct tire fitment matters on a 2009 Acura TL restoration because wheel diameter and sidewall profile have a strong effect on how the car sits and presents. A Base model on 17-inch tires looks different from an SH-AWD w/Tech Pkg. on 19-inch tires, even when the overall tire diameter stays close.
A restoration-oriented approach means confirming the sub-model first and then matching the tire size to the proper wheel setup. That preserves the intended visual balance of the car and avoids mismatched proportions. When exact originality is especially important, period brochures, marque resources, and vehicle-specific records are worth consulting before changing wheels or tire profile.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Acura TL?
Yes, modifications can affect tire fitment on a 2009 Acura TL. Aftermarket wheels, suspension changes, lowering, alignment changes, or body modifications can alter the space available for the tire even when the sidewall size appears close to the original 245-width fitment.
A TL that no longer uses its original wheel package should be checked for actual rim diameter, wheel width, and clearance at the fender and steering components before replacement tires are chosen. That is especially important on the SH-AWD w/Tech Pkg., where the difference between 18-inch and 19-inch fitment changes the entire tire selection path.
What should I inspect before driving a 2009 Acura TL on new tires?
Before driving a 2009 Acura TL on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and make sure inflation is set correctly for the car’s use. It is also wise to look over the suspension and alignment condition so the new tires are not compromised by existing wear issues.
A short initial drive should be followed by a quick recheck for rubbing, air loss, vibration, or uneven seating, particularly if the car has non-stock wheels. Modern performance-oriented radial tires can highlight existing steering or alignment problems, so catching those issues early helps protect both the tire and the driving experience.
How often should tires on a 2009 Acura TL be inspected?
Tires on a 2009 Acura TL should be inspected regularly, not just when tread appears low. A routine visual check for uneven wear, cuts, punctures, sidewall damage, and pressure loss is important on any modern performance-oriented sedan, especially one using lower-profile 18-inch or 19-inch fitments.
Cars that are driven less often still need attention because time, storage conditions, and underinflation can affect tire condition even when mileage stays low. Looking over the tires before longer trips and during normal maintenance visits helps catch aging, alignment drift, or wheel damage before those problems turn into ride, handling, or safety concerns.
