2017 Buick Regal Tires

The 2017 Buick Regal uses three primary tire sizes: 235/50R18, 245/40R19, and 255/35R20. The 235/50R18 size applies to the Base, Premium, and Sport Touring, while the GS uses either 245/40R19 or 255/35R20 depending on its wheel setup.

That means the correct answer starts with identifying the exact Regal sub-model and confirming the wheel diameter already on the car. A Regal with aftermarket wheels or a changed wheel package should be checked carefully before ordering, since a GS size and a non-GS size are not interchangeable just because they belong to the same model line.

The 2017 Buick Regal uses three rim diameters across its covered fitments: 18-inch, 19-inch, and 20-inch. The 18-inch rim pairs with 235/50R18 on Base, Premium, and Sport Touring models, while the GS uses either a 19-inch rim with 245/40R19 or a 20-inch rim with 255/35R20.

Wheel diameter is the first thing to verify before selecting a tire, especially on a car that may have changed hands or been modified. Checking the actual wheel on the vehicle helps prevent ordering the right Regal tire size for the wrong wheel package, and it also keeps attention on proper profile, clearance, and sidewall presentation.

No, the 2017 Buick Regal does not use one tire size across every sub-model. Base, Premium, and Sport Touring share 235/50R18, but the GS moves to either 245/40R19 or 255/35R20, depending on the wheel package fitted to that version.

That split is important because the tire decision is tied directly to the sub-model and wheel diameter, not just the model name. A buyer looking at GS tires should confirm whether the car is on 19-inch or 20-inch wheels, while owners of other Regal trims can focus more on comparing the available 18-inch product styles and series.

Start with the correct size for the exact Regal sub-model and wheel diameter, since 235/50R18, 245/40R19, and 255/35R20 serve different configurations. After that, compare construction details within the radial options, along with rim-width compatibility, load figures where stated, tire series, and sidewall presentation.

A Base, Premium, or Sport Touring owner will usually be choosing among 18-inch tires with more variation in sidewall style, while a GS owner may be choosing between more focused 19-inch or 20-inch performance-oriented options. It also helps to match the tire to how the car is used, whether that means a cleaner modern look, a traditional sidewall accent, or a sportier overall presentation.

Sidewall choices for the 2017 Buick Regal include blackwall, redline, and RWL, or raised white letter, depending on tire size. The broadest sidewall variety appears in 235/50R18 and 255/35R20, while 245/40R19 is available in blackwall form among the covered products.

That matters because sidewall styling changes the car's visual character even when the size stays the same. Blackwall tends to keep the look understated, while redline or raised white letter options add a more expressive appearance, so the better choice comes down to whether the Regal is being kept subtle, personalized, or given a stronger enthusiast-oriented presence.

2017 Buick Regal tire options in these sizes come from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears across all three primary sizes, while Nitto and Pro-Trac add additional choices in the 18-inch and 20-inch Regal fitments.

Brand alone should not be the whole decision, since the available series, sidewall style, and wheel-size compatibility can matter just as much. It is smarter to compare the tire within the correct Regal size first, then look at whether the specific option suits the car's intended look, its wheel package, and the kind of street use the owner expects.

A period-style 2017 Buick Regal tire choice starts with using the correct modern radial size for the specific sub-model and wheel diameter. From there, appearance becomes the real separator, with blackwall options for a restrained factory-inspired look and redline or raised white letter choices for a more customized enthusiast presentation.

Because this Regal is a late-model vehicle, period style usually means preserving the right overall stance rather than chasing antique-style construction details. Matching the original wheel diameter on the car, keeping the proper profile family for that setup, and selecting a sidewall treatment that suits the build will usually matter more than chasing an overly broad brand-based idea of authenticity.

All primary fitments covered for the 2017 Buick Regal are radial, so construction does not create a bias-ply-versus-radial appearance decision here. Visual character comes more from the actual size, wheel diameter, sidewall height, and whether the tire uses a blackwall, redline, or raised white letter treatment.

That means appearance is shaped mostly by preserving the proper 18-, 19-, or 20-inch setup for the sub-model and avoiding a mismatched wheel-and-tire package. On a restoration-minded or carefully kept Regal, the tire should support the car's intended stance and era-appropriate presentation without introducing a profile that looks out of step with the wheels actually fitted.

Yes, modifications can affect tire fitment on a 2017 Buick Regal even when the tire size is one of the correct Regal sizes. Aftermarket wheels, changes in wheel width, suspension lowering, alignment changes, or body modifications can all alter the space available around the tire.

That is especially important on the GS, where the 19-inch and 20-inch fitments already use lower-profile tires. A Regal that no longer has its original wheel package should be checked for wheel diameter, width, and clearance at the fender and steering components before choosing a tire, rather than assuming the model-year fitment alone settles the issue.

Before road use, inspect inflation pressure, wheel lug torque, tread and sidewall condition, and the clearance between the tire and nearby suspension or body components. It also helps to confirm that all four tires match the intended size and that the wheels themselves are free from obvious damage or bead-seat problems.

A short initial drive followed by a second inspection is a practical step, especially if the Regal has recently had wheel work or tire replacement after long storage. Uneven wear, rubbing marks, vibration, or steady air loss should be addressed early, because those signs often point to a wheel issue, alignment problem, or a size mismatch on the vehicle.

Tires on a 2017 Buick Regal should be inspected regularly, not just when tread looks low. Pressure, visible wear, sidewall condition, and any signs of puncture, cracking, bulges, or uneven shoulder wear deserve routine attention, particularly if the car is driven seasonally or sits for stretches between uses.

A monthly visual check is a sensible habit, with a closer look before longer drives or after contact with potholes and curbs. Owners should also keep an eye on how the car sits and drives, since a pull, vibration, or one tire losing air faster than the others may signal a wheel problem, alignment issue, or damage that needs prompt correction.