The 2012 Buick LaCrosse sits in the modern full-size Buick tradition, blending quiet highway comfort with sharper styling and a more contemporary road presence than earlier sedans from the brand. For tire selection, that matters because this LaCrosse does not use one universal fitment across the lineup. Depending on sub-model, it may use 235/50R17, 235/50R18, 245/40R19, or 245/50R17 radial tires. Available choices also vary by tire series and sidewall treatment, with blackwall, redline, and raised white letter options in certain sizes. The first step is matching the exact sub-model and wheel diameter, then choosing the tire character that suits daily driving, appearance, and overall vehicle setup.
Which Tire Size Is Right for The 2012 Buick LaCrosse
The 2012 Buick LaCrosse uses four primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. Fitment spans 17-inch, 18-inch, and 19-inch rims, so confirming the current wheel size is the first priority before comparing tread style, sidewall appearance, or product series within the correct size.
Fit(s): Base, Convenience, Leather 2.4L, and Premium 2.4L
Construction: Radial|Rim: 17 in
A 235/50R17 tire is a metric radial size with a 235 millimeter nominal section width, a 50-series profile, and fitment for a 17-inch rim. On the 2012 Buick LaCrosse, this size serves several sub-models and keeps the selection centered on modern radial construction rather than older bias-ply formats. Product choice in this size is more focused, with a blackwall BFGoodrich g-Force Comp 2 AS option available. This size makes sense when the car is equipped with the correct 17-inch wheel and the goal is staying with the original size format for that configuration.
A 235/50R18 tire uses the same 235 millimeter width and 50-series profile as the 17-inch version, but it is built for an 18-inch rim. For the 2012 Buick LaCrosse, this size opens up the broadest product variety, all in radial construction, with choices from BFGoodrich, Nitto, and Pro-Trac. Sidewall treatments include blackwall, redline, and raised white letter, and several tire series are available for buyers who want either a more understated look or a more distinctive presentation. This size is worth evaluating carefully when the vehicle already has 18-inch wheels and you want more than one styling or series option.
A 245/40R19 tire is a wider metric radial size with a lower 40-series profile and fitment for a 19-inch rim. On the 2012 Buick LaCrosse, this size is tied to specific higher-trim or Touring applications, so it should not be treated as a universal choice across the model range. Available products stay within blackwall performance-oriented radial offerings from BFGoodrich across multiple g-Force series. This size deserves close attention if the car wears 19-inch wheels, since wheel diameter and the lower-profile fitment need to match the actual vehicle setup before selection.
A 245/50R17 tire combines a 245 millimeter nominal section width with a 50-series profile on a 17-inch rim. For the 2012 Buick LaCrosse, this is a specific radial fitment used on certain 3.6L sub-model applications rather than the full lineup. Product listings are not present in this size here, so the decision starts with confirming that this is the exact fitment for the car, especially if wheel or trim changes may have occurred over time. It is a size to verify carefully because it shares the 17-inch rim diameter with 235/50R17 but not the same width and profile.
Tire fitment for the 2012 Buick LaCrosse varies by sub-model, and some trims use more than one size depending on wheel package. Matching the exact trim and rim diameter is the key step before narrowing the choice to a specific tire series, sidewall style, or brand.
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2012 Buick LaCrosse Base
The 2012 Buick LaCrosse Base uses a single radial tire size, which keeps fitment straightforward as long as the car still carries its correct wheel diameter. Tire selection then becomes a matter of choosing the right product character within that size rather than sorting through multiple primary fitments.
The 2012 Buick LaCrosse Convenience follows the same one-size radial fitment pattern as other 17-inch applications in the lineup. That makes the main buying decision less about basic fitment and more about confirming the wheel setup and selecting an appropriate tread and sidewall presentation.
The 2012 Buick LaCrosse Leather 2.4L uses one radial tire size, so the fitment path is relatively simple when the vehicle remains in stock wheel form. Focus on the correct size first, then compare available product features such as brand, series, and sidewall style where applicable.
The 2012 Buick LaCrosse Leather 3.6L is the most size-sensitive configuration here, with fitments that span 17-inch, 18-inch, and 19-inch wheel diameters. That makes wheel confirmation especially important before choosing a tire, since the correct selection depends on the actual wheel package mounted on the car.
The 2012 Buick LaCrosse Premium 2.4L uses a single radial tire size, which simplifies replacement when the vehicle still has the proper wheel diameter. Buyers can concentrate on tire type and appearance details within that size instead of sorting through several primary fitment paths.
The 2012 Buick LaCrosse Premium 3.6L uses more than one radial tire size, so the correct choice depends on the exact wheel setup on the vehicle. Checking the wheel diameter first helps avoid mixing 17-inch and 18-inch fitments that are both associated with this trim.
The 2012 Buick LaCrosse Touring uses a 19-inch radial fitment, which sets it apart from several other trims in the range. Tire selection should stay centered on that wheel diameter and the lower-profile size that belongs with it, rather than assuming interchangeability with the 17-inch or 18-inch applications.
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 2012 Buick LaCrosse Tires for Sale
Available 2012 Buick LaCrosse tire choices center on 235/50R17, 235/50R18, and 245/40R19 radial fitments. Buyers can compare BFGoodrich, Nitto, and Pro-Trac options across blackwall, redline, and raised white letter styles, along with several g-Force and Street Pro III series offerings.
Common 2012 Buick LaCrosse tire questions usually come down to exact size by sub-model, wheel diameter, available radial options, sidewall style choices, and what to inspect before putting the car back into regular road use.
Tire Size & Fitment
What tire size fits a 2012 Buick LaCrosse?
The 2012 Buick LaCrosse uses four primary tire sizes: 235/50R17, 235/50R18, 245/40R19, and 245/50R17. All are radial sizes, but they do not apply across the entire model range, so there is no single universal fitment for every 2012 LaCrosse.
The correct choice depends on the exact sub-model and the wheel diameter currently on the car. A Base, Convenience, or 2.4L trim may not use the same tire size as a Touring or 3.6L application, and some trims overlap with more than one wheel package, making wheel verification the first step.
What size rim does a 2012 Buick LaCrosse use?
A 2012 Buick LaCrosse can use 17-inch, 18-inch, or 19-inch rims, depending on sub-model and wheel package. The tire sizes tied to those diameters are 235/50R17 and 245/50R17 on 17-inch rims, 235/50R18 on 18-inch rims, and 245/40R19 on 19-inch rims.
That variation means a quick look at the sidewall is often not enough if the car has changed hands or has been modified. Confirm the actual wheel diameter on the vehicle before selecting a tire, especially on Leather 3.6L and Premium 3.6L trims where more than one size may apply.
Do all 2012 Buick LaCrosse sub-models use the same tire size?
No, 2012 Buick LaCrosse sub-models do not all use the same tire size. Several trims use 235/50R17, while others use 235/50R18, 245/40R19, or 245/50R17, and certain 3.6L versions are associated with more than one fitment depending on wheel setup.
This matters because choosing by year and model alone can still leave room for error. The safest approach is to match the trim name and then confirm the wheel diameter already on the car, particularly if it has optional wheels, a replacement wheel set, or tires installed by a previous owner.
Choosing the Right Tire
What should I consider when choosing a 2012 Buick LaCrosse tire?
Start with the correct primary size for the exact sub-model and wheel diameter, since the 2012 Buick LaCrosse uses several different radial fitments. After that, compare construction details within the size, including tire series, sidewall treatment, rim-width compatibility, and any load information attached to a specific product.
The right choice depends on how the car is used and how the owner wants it to look. A blackwall performance-oriented tire may suit one LaCrosse, while a redline or raised white letter option may appeal more on an 18-inch setup where those styles are available.
What sidewall styles are available for 2012 Buick LaCrosse tires?
Sidewall style depends on the tire size. Blackwall options are available across the listed 235/50R17, 235/50R18, and 245/40R19 products, while 235/50R18 also includes redline and RWL, or raised white letter, choices in the Pro-Trac Street Pro III series.
That means appearance selection is not identical across every LaCrosse fitment. If sidewall presentation matters, confirm the car uses 18-inch wheels before focusing on redline or raised white letter styles, since buyers with 17-inch or 19-inch applications may have a more traditional blackwall-only path.
What brands offer tires for the 2012 Buick LaCrosse?
Available 2012 Buick LaCrosse tire brands include BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich appears across multiple fitments and series, Nitto is offered in 235/50R18, and Pro-Trac appears in 235/50R18 with specialty sidewall treatments.
Brand choice should come after basic fitment is settled, not before. Once the correct size and wheel diameter are confirmed, compare the available series and sidewall styles within that size, since some brands offer a broader range while others are tied to a more specific visual or performance-oriented presentation.
Restoration & Appearance
Which tire should I choose for a period-style 2012 Buick LaCrosse?
A period-style 2012 Buick LaCrosse tire choice starts with keeping the correct primary size for the specific trim and wheel diameter. Since this is a modern radial-fitment vehicle, the visual decision is less about bias-ply versus radial and more about whether a blackwall, redline, or raised white letter presentation suits the car.
The strongest appearance variation appears in 235/50R18, where blackwall, redline, and RWL options are available. Staying close to the vehicle’s original overall character usually means avoiding a casual size change and focusing instead on sidewall style, series selection, and a look that matches the wheels and trim level.
How does tire construction affect the appearance of a restored 2012 Buick LaCrosse?
Tire construction does not create a major appearance split on the 2012 Buick LaCrosse because the primary fitments here are radial across the board. The visual character comes more from size, sidewall style, and the tire series itself than from choosing between radial and bias-ply construction.
For a restoration-minded owner, appearance decisions are mostly about preserving the proper wheel-and-tire relationship for the trim level. A lower-profile 19-inch setup presents the car differently than a 17-inch or 18-inch fitment, so keeping the correct size is usually more important than chasing an aggressive or novelty sidewall look.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2012 Buick LaCrosse?
Yes, modifications can affect tire fitment on a 2012 Buick LaCrosse. Changes such as aftermarket wheels, altered wheel width, suspension lowering, or non-stock offsets can change how a 235/50R17, 235/50R18, 245/40R19, or 245/50R17 tire sits in the wheel opening and clears steering or suspension components.
Even when the tire size itself is one associated with the LaCrosse, the actual setup still matters. Check wheel diameter first, then confirm width, clearance at full steering lock, and any signs of rubbing around the fender liners or suspension, especially on trims where multiple factory-style wheel packages were used.
What should I inspect before driving a 2012 Buick LaCrosse on new tires?
Before driving a 2012 Buick LaCrosse on new tires, inspect the wheels for the correct diameter and condition, make sure the tire size matches the car’s sub-model, and verify that the tires are seated and inflated properly. It is also wise to check for obvious alignment or suspension issues that could affect wear.
A short local drive followed by a recheck can reveal vibration, rubbing, or air loss before the car is used more seriously. Pay close attention if the LaCrosse has recently changed wheel sizes, since a 17-inch, 18-inch, or 19-inch setup each carries its own fitment expectations and clearance needs.
How often should tires on a 2012 Buick LaCrosse be inspected?
Tires on a 2012 Buick LaCrosse should be inspected regularly, not just when tread looks low. Check them before longer drives and at routine intervals for uneven wear, sidewall damage, punctures, cracking, or persistent pressure loss, especially if the car sees seasonal use or long periods parked.
Consistent inspection is especially useful on a model with several possible wheel-and-tire combinations, because mismatched replacements can go unnoticed until wear or handling issues appear. Looking over the tires and wheels together helps catch the wrong size, improper inflation, or contact problems before they turn into a larger fitment issue.
