The 2011 Buick Regal marked Buick’s return to a more European-flavored sport sedan, blending contemporary comfort with a sharper, more athletic character than many earlier Regals. That makes tire choice especially important, because the car’s stance and road manners depend heavily on the exact wheel and tire package on the car. The 2011 Buick Regal uses radial fitments in 235/50R18 and, on certain CXL Turbo configurations, 245/40R19. Available choices include blackwall performance-oriented tires along with redline and raised white letter options in the 18-inch size. The key is confirming the exact sub-model and wheel diameter before choosing a tire that matches your driving goals and appearance preferences.
Which Tire Size Is Right for The 2011 Buick Regal
Two primary tire sizes apply to the 2011 Buick Regal, and the correct one depends on the exact sub-model and wheel package. Both are radial sizes, but they use different rim diameters: 18 inches for 235/50R18 and 19 inches for 245/40R19. Before comparing brands or sidewall styles, the first step is confirming whether the car is running the 18-inch or 19-inch setup.
235/50R18 is a modern metric radial size in which 235 identifies the nominal section width in millimeters, 50 is the aspect ratio, R indicates radial construction, and 18 is the wheel diameter in inches. On the 2011 Buick Regal, this size is used on the 18-inch wheel setup and appears on the CXL as well as certain CXL Turbo configurations. Available choices include BFGoodrich, Nitto, and Pro-Trac, with blackwall, redline, and RWL sidewall treatments across several tire series. This size is the right place to focus if your Regal has 18-inch wheels and you want either a conventional blackwall look or a more distinctive visual treatment.
245/40R19 is a modern metric radial size where 245 is the nominal section width in millimeters, 40 is the aspect ratio, R denotes radial construction, and 19 is the required wheel diameter in inches. On the 2011 Buick Regal, this size is tied to 19-inch wheel applications within the CXL Turbo range rather than the full model line. Product choices center on BFGoodrich blackwall tires in several g-Force series, giving buyers a focused performance-style selection. This is the size to evaluate only after confirming that the car is actually equipped with the 19-inch wheel package.
Sub-model fitment matters on the 2011 Buick Regal because tire size is not the same across the full lineup. The CXL stays with one straightforward size, while the CXL Turbo can appear with either of the two radial fitments depending on its wheel setup.
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2011 Buick Regal CXL
The 2011 Buick Regal CXL uses the 235/50R18 radial size on an 18-inch wheel. Tire selection here is mainly about choosing among available brands, tire series, and sidewall styles rather than sorting through multiple primary fitments.
The 2011 Buick Regal CXL Turbo can use either 235/50R18 or 245/40R19, so wheel diameter has to be confirmed before choosing a tire. That makes this sub-model less about broad interchangeability and more about matching the exact wheel package already on the car.
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 2011 Buick Regal Tires for Sale
Available Regal tire choices center on 235/50R18 and 245/40R19 radial fitments from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare blackwall performance-oriented options across several g-Force and Street Pro III series, with redline and RWL styling available in the 18-inch size.
Tire questions for the 2011 Buick Regal usually come down to identifying the right size, confirming 18-inch versus 19-inch wheel fitment, and choosing among radial tire styles, brands, and appearance options. The details below focus on those exact decisions.
Tire Size & Fitment
What tire size fits a 2011 Buick Regal?
The 2011 Buick Regal uses two primary radial tire sizes: 235/50R18 and 245/40R19. The 235/50R18 size applies to the Regal CXL and also appears on some CXL Turbo configurations, while 245/40R19 is used on certain CXL Turbo setups with 19-inch wheels.
The practical decision is confirming which wheel package is on the car before comparing tires. A Regal CXL is straightforward, but a CXL Turbo can require either size, so checking the existing tire sidewall and wheel diameter helps prevent choosing a tire meant for a different setup.
What size rim does a 2011 Buick Regal use?
A 2011 Buick Regal uses either an 18-inch or 19-inch rim, depending on the tire size and sub-model configuration. The 235/50R18 fitment uses an 18-inch rim, while the 245/40R19 fitment uses a 19-inch rim.
Rim diameter is the first thing to verify because neither tire size crosses over to the other wheel size. Once the diameter is confirmed, it becomes much easier to compare the available tires by brand, series, sidewall style, and rim-width compatibility within the correct fitment group.
Do all 2011 Buick Regal sub-models use the same tire size?
No, all 2011 Buick Regal sub-models do not use the same tire size. The Regal CXL uses 235/50R18, while the Regal CXL Turbo can use either 235/50R18 or 245/40R19 depending on the wheel package on the car.
That difference matters because the Turbo model is the one most likely to create confusion during replacement. Identifying the sub-model helps, but it is still smart to confirm the actual wheel diameter and current size on the vehicle, especially if the car has changed hands or may have had wheel swaps in the past.
Choosing the Right Tire
What should I consider when choosing a 235/50R18 tire for a 2011 Buick Regal?
Choosing a 235/50R18 tire for a 2011 Buick Regal starts with confirming the car is on the 18-inch setup. Once that is settled, the real comparison points are brand, tire series, sidewall style, rim-width specification, and whether the tire matches the way the car is driven and presented.
This size offers the broadest variety, including BFGoodrich, Nitto, and Pro-Trac options with blackwall, redline, and RWL styling. A buyer focused on a cleaner modern look may lean toward blackwall, while someone who wants a more distinctive appearance may prefer redline or raised white letter treatment in the same primary size.
What sidewall styles are available for 2011 Buick Regal tires?
Sidewall choice varies by size on the 2011 Buick Regal. In 235/50R18, available styles include blackwall, redline, and RWL, while the 245/40R19 options shown here use blackwall sidewalls.
That means sidewall appearance can become part of the decision if the car uses the 18-inch fitment. Buyers who want a restrained contemporary look can stay with blackwall, while redline or raised white letter tires create a more noticeable visual statement without changing the primary 235/50R18 sizing.
What brands offer tires for the 2011 Buick Regal?
Tires for the 2011 Buick Regal are available here from BFGoodrich, Nitto, and Pro-Trac, depending on size. The 235/50R18 fitment has the widest brand spread, while the 245/40R19 selection centers on BFGoodrich offerings in several g-Force series.
Brand alone should not be the only factor in the decision. It makes more sense to compare the correct size first, then narrow the choices by series, sidewall style, rim-width range, and overall vehicle use, especially if the Regal serves as more than an occasional fair-weather driver.
Restoration & Appearance
Which tire should I choose for a period-style 2011 Buick Regal?
A period-style approach for a 2011 Buick Regal still begins with the correct modern radial size for the car’s wheel package. For most appearance-minded buyers, that means deciding between 235/50R18 and 245/40R19 first, then selecting a tire whose sidewall treatment and series character suit the Regal’s sport sedan personality.
The 18-inch size offers the broadest visual range because it includes blackwall, redline, and RWL options. A buyer chasing a cleaner showroom-era look may stay subtle with blackwall, while someone who wants a more expressive custom-era presentation may find the 18-inch redline or raised white letter choices more appealing.
How does tire construction affect the appearance of a restored 2011 Buick Regal?
On a 2011 Buick Regal, construction is less of a visual dividing line than on earlier collector cars because both primary fitments here are radial. The appearance difference comes more from size, sidewall style, and tire series than from choosing between bias-ply and radial construction.
That makes visual planning more straightforward. A restored or carefully preserved Regal will usually look most coherent when the tire matches the wheel diameter already on the car and the sidewall treatment supports the intended presentation, whether that means understated blackwall or a more noticeable redline or RWL look in 18-inch form.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2011 Buick Regal?
Yes, modifications can affect tire fitment on a 2011 Buick Regal even when the tire size itself seems correct. Aftermarket wheels, suspension changes, altered ride height, and body or brake-package changes can all influence how an 18-inch or 19-inch tire sits and clears the car.
A Regal that has been lowered or fitted with non-original wheels deserves an extra check of wheel width, clearance at full steering lock, and space around the fender and suspension. That is especially important on the CXL Turbo, where the difference between the 18-inch and 19-inch setups already narrows the margin for assumptions.
What should I inspect before driving a 2011 Buick Regal on new tires?
Before driving a 2011 Buick Regal on new tires, inspect the wheel condition, confirm the tire size matches the wheel diameter, and make sure each tire is free from shipping damage or mounting-related issues. Tire pressure should also be set correctly and checked again after the first miles of use.
It also helps to look over alignment condition, suspension wear, and basic clearance with the steering turned through its range. A car that pulls, vibrates, or shows uneven wear can shorten tire life quickly, so addressing those issues early protects both the new tires and the Regal’s road manners.
How often should tires on a 2011 Buick Regal be inspected?
Tires on a 2011 Buick Regal should be inspected regularly, not just at replacement time. A quick visual check for uneven wear, cuts, bulges, cracking, and pressure loss is worthwhile throughout the driving season, especially on a car that sees mixed daily and occasional enthusiast use.
Longer gaps between inspections can allow a small problem to become a larger one, particularly if the car sits for extended periods or is driven on rough pavement. Checking tread condition, air pressure, and general sidewall health before longer drives is a simple habit that helps keep fitment issues and road surprises to a minimum.
