The 2012 Buick Regal brought Buick's midsize sport sedan back into a more European-flavored direction, with sharper chassis tuning and trim levels that ranged from efficient daily driving to the more aggressive GS. Tire selection on this Regal is configuration-specific, with four primary radial sizes used across the lineup: 235/50R17, 235/50R18, 245/40R19, and 255/35R20. That means the real starting point is confirming the exact sub-model and wheel diameter before comparing tires. Available choices then branch into different brands, series, and sidewall presentations, including blackwall, redline, and raised white letter options in certain sizes. For a stock car, appearance, wheel compatibility, and intended road use all matter just as much as the size itself.
Which Tire Size Is Right for The 2012 Buick Regal
The 2012 Buick Regal uses four different tire sizes, and the correct one depends on the exact sub-model and wheel diameter. All primary fitments are radial, but the lineup spans 17-inch, 18-inch, 19-inch, and 20-inch rims, so confirming the actual wheel setup comes before choosing a tire. Once that is settled, the comparison shifts to series, brand, sidewall style, and the overall character you want from the tire.
235/50R18 is a metric radial size that uses a 235-millimeter nominal section width, a 50-series aspect ratio, and an 18-inch rim. On the 2012 Buick Regal, this size suits configurations that use an 18-inch wheel and keeps the buyer focused on radial tire choices rather than vintage construction decisions. Product selection is broad here, with BFGoodrich, Nitto, and Pro-Trac options, along with blackwall, redline, and raised white letter sidewalls across several tire series. It is a useful size to evaluate carefully if your Regal is equipped with 18-inch wheels and you want either a modern performance look or a more stylized presentation.
245/40R19 is a metric radial size with a 245-millimeter nominal section width, a 40-series profile, and fitment for a 19-inch rim. On the 2012 Buick Regal, this size appears on trims that step into a lower-profile 19-inch wheel setup, making wheel confirmation especially important before selection. Available products center on BFGoodrich in blackwall form, with g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series represented. This size makes sense when your Regal already uses the 19-inch arrangement and you want to compare tire series within that specific profile and wheel package.
255/35R20 is a metric radial size that combines a 255-millimeter nominal section width with a 35-series profile on a 20-inch rim. For the 2012 Buick Regal, it belongs to the largest wheel fitment in the range, so it should be chosen only after confirming the car actually carries the 20-inch setup. Buyers will find blackwall options from BFGoodrich and Nitto, plus Pro-Trac Street Pro III choices in redline and raised white letter form. This size is the one to focus on when the Regal's wheel package and overall look call for the most aggressive low-profile presentation in the lineup.
235/50R17 is a metric radial size with a 235-millimeter nominal section width, a 50-series aspect ratio, and a 17-inch rim diameter. On the 2012 Buick Regal, this size serves the configuration that uses the smallest wheel diameter in the range, so it is distinct from the 18-inch, 19-inch, and 20-inch setups used elsewhere in the lineup. The available product selection here is straightforward, centered on a BFGoodrich g-Force Comp 2 AS blackwall radial. It is the size to choose when the car remains on its original 17-inch wheel package and the goal is staying with the proper wheel diameter and profile.
Tire fitment for the 2012 Buick Regal changes by sub-model, and some trims use more than one wheel and tire package. Checking the exact Regal variant matters first, because the lineup spans four primary sizes and four different rim diameters.
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2012 Buick Regal Base
The 2012 Buick Regal Base uses the 235/50R18 radial size. Tire selection here is less about sorting through multiple fitment sizes and more about comparing available brands, series, and sidewall treatments for an 18-inch wheel setup.
The 2012 Buick Regal GS uses either 245/40R19 or 255/35R20 radial tires, depending on the wheel package on the car. That makes wheel diameter the first thing to confirm before comparing tire series, sidewall style, or overall presentation.
The 2012 Buick Regal Turbo can use either 235/50R18 or 245/40R19 radial tires. Choosing correctly starts with confirming whether the car is on 18-inch or 19-inch wheels, then narrowing the search by tire series and intended use.
The 2012 Buick Regal eAssist uses the 235/50R17 radial size. With one primary size in play, the focus shifts to keeping the correct 17-inch fitment and selecting a tire that suits the car's present wheel setup and road use.
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 Regal Tires for Sale
Available 2012 Buick Regal tire choices vary by size, wheel package, and intended look. Across the lineup, options include BFGoodrich, Nitto, and Pro-Trac tires in series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Nitto NT555 G2, and Street Pro III, with blackwall, redline, and raised white letter sidewalls in certain sizes.
The most common 2012 Buick Regal tire questions center on identifying the correct size by sub-model and wheel diameter, then comparing available radial options, sidewall styles, and practical fitment checks before regular road use.
Tire Size & Fitment
What tire size fits a 2012 Buick Regal?
The 2012 Buick Regal uses four primary tire sizes: 235/50R17, 235/50R18, 245/40R19, and 255/35R20. The correct size depends on the exact sub-model and wheel package, with Base using 235/50R18, eAssist using 235/50R17, Turbo using either 235/50R18 or 245/40R19, and GS using either 245/40R19 or 255/35R20.
That range makes wheel confirmation just as important as trim identification. A Regal that has been fitted with different factory-style wheels or later aftermarket wheels may no longer match the tire size you expected, so checking the actual rim diameter on the car is the safest place to begin before comparing brands or tire series.
What size rim does a 2012 Buick Regal use?
The 2012 Buick Regal uses several rim diameters, depending on sub-model and wheel package: 17-inch, 18-inch, 19-inch, and 20-inch. Those diameters correspond to the Regal's primary tire sizes, so the tire must match the wheel diameter exactly rather than simply matching the car's model year and name.
The practical takeaway is to inspect the wheels on the car before ordering tires. Turbo and GS models can appear with more than one factory-size combination, and any later wheel change can alter the correct fitment path, so diameter should be confirmed before looking at width, profile, brand, or sidewall style.
Why does the 2012 Buick Regal have more than one tire size?
The 2012 Buick Regal has more than one tire size because the lineup includes different sub-models and wheel packages. Base, Turbo, GS, and eAssist do not all use the same wheel diameter, and both Turbo and GS can be found with two different primary tire sizes tied to different rim sizes.
That means there is no single universal Regal tire choice for 2012. The right approach is to identify the exact sub-model, then verify whether the car is wearing 17-inch, 18-inch, 19-inch, or 20-inch wheels, since that determines which tire size category you should compare in the first place.
Choosing the Right Tire
What should I consider when choosing a 2012 Buick Regal tire?
Start with the correct size for the exact Regal sub-model and wheel diameter, since the 2012 lineup spans 235/50R17, 235/50R18, 245/40R19, and 255/35R20. From there, compare the tire's construction, intended character, and product details such as rim-width compatibility, load figures where shown, and the tire series available in that size.
Appearance can also matter more than many buyers expect. Some Regal sizes are available only in blackwall form, while 235/50R18 and 255/35R20 also open the door to redline or raised white letter styling, so the final decision often comes down to how the tire should look and how the car will be driven.
What sidewall styles are available for 2012 Buick Regal tires?
Sidewall choices for the 2012 Buick Regal include blackwall, redline, and RWL, depending on the tire size. Blackwall is available across the full fitment range, while redline and RWL appear in certain 18-inch and 20-inch options rather than across every Regal tire size.
That means sidewall style should be treated as a size-specific choice, not a whole-vehicle choice. Once the correct tire size is confirmed, you can decide whether the car calls for a cleaner modern blackwall look or a more expressive visual treatment without stepping outside the Regal's proper rim diameter.
What brands offer tires for the 2012 Buick Regal?
Tires for the 2012 Buick Regal are available from BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich appears across all four primary Regal sizes, while Nitto and Pro-Trac are offered in selected 18-inch and 20-inch applications where buyers have more variety in both series and sidewall presentation.
Brand should be compared alongside the specific size and tire series rather than treated as the only decision. A Regal owner may find that one wheel package offers multiple product styles and another offers only a narrow selection, so the best comparison starts within the exact size the car actually uses.
Restoration & Appearance
Which tire should I choose for a period-style 2012 Buick Regal?
A period-style 2012 Buick Regal should still begin with the correct original-size category for its sub-model and wheel diameter. Since this Regal uses modern radial fitments rather than vintage bias-ply sizing, the period-style decision usually comes down to choosing a tire series and sidewall treatment that suits the car's trim and overall presentation.
Blackwall gives the most restrained modern look, while selected 18-inch and 20-inch sizes also allow redline or raised white letter styling for a more assertive appearance. Buyers focused on authenticity should compare the car's current wheel package with period photos, dealer literature, or marque-specific references before settling on appearance details.
How does tire construction affect the appearance of a restored 2012 Buick Regal?
Construction is straightforward on the 2012 Buick Regal because the primary fitments are all radial. That means the appearance difference is driven less by bias-ply versus radial choice and more by the tire's profile, wheel diameter, sidewall treatment, and the visual character of the series available in the correct size.
A 17-inch or 18-inch Regal setup naturally presents a fuller sidewall than a 19-inch or 20-inch package, while blackwall, redline, and raised white letter treatments can change the car's look without changing the basic fitment class. Keeping the proper size for the exact wheel package preserves the Regal's intended stance more effectively than chasing a look through the wrong dimensions.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2012 Buick Regal?
Yes, modifications can affect tire fitment on a 2012 Buick Regal. Aftermarket wheels, altered offsets, suspension changes, and ride-height adjustments can change the space available for the tire, even when the car still appears to match one of the Regal's original size categories.
A modified Regal should be checked for actual wheel diameter, wheel width, and clearance at the fender, suspension, and steering positions before a replacement tire is chosen. Even on an unmodified car, it helps to confirm the existing setup rather than relying only on model and trim, especially with Turbo and GS variants.
What should I inspect before driving a 2012 Buick Regal on new tires?
Before driving a 2012 Buick Regal on new tires, inspect the wheels for damage, confirm the tire size matches the rim diameter, and make sure inflation is set appropriately for the tire and vehicle setup. It also helps to look over the suspension and steering components so the new tires are not being asked to compensate for worn hardware.
A short, careful road test is a smart next step. Listen for rubbing, feel for vibration, and recheck clearances if the car has 19-inch or 20-inch wheels, aftermarket rims, or recent suspension work, since lower-profile fitments leave less room for error than a visual inspection alone may suggest.
How often should tires on a 2012 Buick Regal be inspected?
Tires on a 2012 Buick Regal should be inspected regularly, not just when tread looks low. Pressure, uneven wear, cuts, bulges, cracking, and slow air loss are all worth checking, especially on a car that may sit for stretches and then return to regular use.
The inspection routine should become more careful if the Regal runs 19-inch or 20-inch tires, since lower-profile sizes can be more vulnerable to wheel or road-impact issues. It is also wise to recheck tire condition before longer drives, seasonal changes, or any trip that follows extended storage or limited recent mileage.
