2014 Buick Tire Fitment Guide

2014 Buick vehicles use seven sizes across three models: 235/50R17 and 235/50R18 for both LaCrosse and Regal, 245/45R19 and 245/40R20 for LaCrosse, 245/40R19 and 255/35R20 for Regal, and 235/45R18 for Verano. Rim diameters span 17, 18, 19, and 20 inches. Where rim-width guidance is available, 235/50R17 and 235/50R18 fit 6.5- to 8.5-inch rims, 245/45R19 and 235/45R18 fit 7.5- to 9.0-inch rims, 245/40R19 and 245/40R20 fit 8.0- to 9.5-inch rims, and 255/35R20 fits 8.5- to 10.0-inch rims.

That means year and make alone are not enough for a correct choice on a 2014 Buick. Start by identifying whether you have a LaCrosse, Regal, or Verano, then confirm the wheel diameter already on the car before comparing brands or tread styles. LaCrosse and Regal share some overlap at 17 and 18 inches, but each also uses its own larger-diameter sizes. Verano stands apart with a dedicated 18-inch fitment.

On a 2014 Buick, 235/50R18 is a metric radial size. The 235 is the nominal section width in millimeters, 50 is the aspect ratio, meaning the sidewall height is 50 percent of the section width, R identifies radial construction, and 18 is the wheel diameter in inches. That size appears on both the 2014 Buick LaCrosse and 2014 Buick Regal, and it commonly fits rims from 6.5 to 8.5 inches wide.

Knowing how to read that code helps you avoid substituting a tire that only looks close on paper. A 235/50R18 is not interchangeable with a 235/45R18, and it is also not a substitute for the 17-, 19-, or 20-inch Buick sizes because the wheel diameter must match exactly. Once the code matches your Buick's wheel, you can compare brand, load, and sidewall details within that same size.

No. 2014 Buick fitment changes by model, and in some cases by wheel package within the same model. LaCrosse uses 235/50R17, 235/50R18, 245/45R19, and 245/40R20. Regal uses 235/50R17, 235/50R18, 245/40R19, and 255/35R20. Verano uses 235/45R18. All of them are radial tires, but they do not share one universal size across the full Buick lineup.

That variation matters because the wrong diameter or profile can create clearance issues, change overall stance, and alter speedometer behavior. It also affects which products you can choose, since each size has its own brand mix, load ratings, and sidewall options. If you are unsure whether your 2014 Buick still has its original wheel package, check the tire sidewall currently on the car before moving forward.

Most 2014 Buick tire sizes are available in Blackwall form, which suits the modern factory appearance of LaCrosse, Regal, and Verano models. The one exception is 245/40R20, which also appears with an RWL, or raised white letter, sidewall. That makes the 20-inch LaCrosse fitment the only size here with a sidewall-style choice beyond a plain black sidewall.

For a 2014 Buick, Blackwall is the most natural visual match if you want to stay close to the car's original upscale, late-model presentation. An RWL tire creates a sportier, more aftermarket look and may appeal to owners personalizing a larger-wheel LaCrosse. Sidewall style does not change the size itself, but it does change the car's visual character, so it is worth deciding before narrowing your product choice.

2014 Buick sizes are covered by BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears across every Buick size here, while Nitto covers several 18-, 19-, and 20-inch applications including 235/50R18, 245/45R19, 245/40R20, and 255/35R20. Pro-Trac appears in 245/40R20. Brand choice is broadest in the shared 235/50R18 and the larger 19- and 20-inch LaCrosse and Regal sizes.

That spread gives buyers a chance to prioritize what matters most to them within the correct size, whether that is staying with a familiar performance-oriented brand family or choosing a particular sidewall presentation. It also means the same Buick model can have a much wider product selection in one wheel package than another. Once the size is confirmed, compare the available brands inside that exact fitment rather than across different diameters.

On several 2014 Buick sizes, BFGoodrich offers both g-Force COMP-2 A/S and g-Force Phenom T/A. In 245/45R19, the COMP-2 A/S carries a 98W specification while the Phenom T/A carries a 102Y specification and a max load figure of 1,874 pounds at 50 psi. In 245/40R20, the COMP-2 A/S carries 99W XL while the Phenom T/A carries 99Y with a max load figure of 1,709 pounds at 50 psi. In 255/35R20, the COMP-2 A/S carries 97W XL while the Phenom T/A carries 97Y with a 1,609-pound max load at 50 psi.

Those differences matter when you are comparing tires within the same Buick size rather than trying to decide between different sizes. The Y-rated Phenom T/A versions carry a higher speed ceiling than W-rated alternatives, while the exact load figures and XL markings vary by size and product. Matching the tire to your actual wheel package remains the first step, then you can compare those within-size differences to suit how the car is used.

Rim-width guidance for 2014 Buick tires varies by size. 235/50R17 and 235/50R18 fit 6.5- to 8.5-inch rims. 245/45R19 and 235/45R18 fit 7.5- to 9.0-inch rims. 245/40R19 and 245/40R20 fit 8.0- to 9.5-inch rims. 255/35R20 fits 8.5- to 10.0-inch rims. Those ranges follow the tire size itself, not the Buick badge alone.

That is why wheel diameter and wheel width both matter before replacing tires on a 2014 Buick. A tire can match the wheel diameter and still be wrong for the wheel width if the rim falls outside the approved range. If the car has aftermarket wheels, measure or confirm the wheel width before ordering, especially on the lower-profile 19- and 20-inch Regal and LaCrosse fitments.

The 2014 Buick sizes here are modern radial fitments, and none of the size markings indicate tube-type construction. These products are configured as tubeless passenger-car radials rather than the tube-type designs associated with much earlier collector vehicles. That applies across the 17-, 18-, 19-, and 20-inch Buick sizes shown for LaCrosse, Regal, and Verano.

In practical terms, a 2014 Buick owner should focus more on wheel condition, valve stems, and proper bead seating than on tube selection. If a wheel has been refinished, repaired, or swapped for an aftermarket piece, confirm that it is intended for tubeless radial use and that the valve hardware is in good condition. Any recurring pressure loss should be traced to the wheel, valve stem, or puncture rather than assumed to require a tube.

A 2014 Buick should be stored on clean, properly inflated tires and kept away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone sources that accelerate rubber aging. A cool, dry garage is far better than outdoor storage, especially for lower-profile 19- and 20-inch tires that can show cosmetic aging more quickly. If the car will sit for extended periods, rolling it periodically helps avoid long-term flat spotting.

Long storage intervals are easier on the tires when the car is not left with one contact patch bearing the same load month after month. For seasonal storage, many collectors either move the car occasionally or support it in a way that reduces sustained tire loading while keeping the suspension considerations in mind. Before returning a stored 2014 Buick to the road, inspect every sidewall and tread groove closely and reset pressures cold.

On a 2014 Buick, tire age is usually a more important replacement factor than mileage alone, especially for cars that see occasional or seasonal use. A sensible rule is to evaluate condition closely once tires reach five to seven years of age and to treat around ten years as a serious replacement point regardless of remaining tread. The DOT date code on the sidewall gives the tire's week and year of manufacture.

That approach matters because a low-mile Buick can still be riding on aged rubber that looks acceptable at a quick glance. Heat cycles, ozone exposure, and long stationary periods harden the compound over time even when tread depth remains good. If your 2014 Buick is still wearing older tires from a prior owner, age-check them before trusting the car on higher-speed roads or extended trips.

Tires on a 2014 Buick deserve a quick inspection before every drive and a more careful inspection before any longer outing. Check for sidewall cracking, punctures, bulges, uneven wear, and pressure loss, and make sure tread wear is even across the tire face. Because these are tubeless radials, valve stems and bead areas also deserve attention if air loss has been an issue.

Frequent inspection is especially important on cars with 19- and 20-inch low-profile tires, since impact damage or shoulder wear can be less obvious until it becomes serious. A few minutes in the garage can catch aging or alignment problems before they turn into a roadside problem. If one tire on a 2014 Buick shows wear that differs sharply from the others, inspect the suspension and alignment before fitting replacements.

A 2014 Buick LaCrosse was originally a modern radial-tire car, not a bias-ply-era vehicle, and its fitments here include 235/50R17, 235/50R18, 245/45R19, and 245/40R20 depending on wheel package. Those sizes reflect Buick's factory move toward larger-diameter alloy wheels and lower-profile radial construction in the 2010s. Original-equipment branding could vary by market, trim, and assembly timing, so the most reliable confirmation comes from the tire placard and the car's original literature.

For a factory-correct restoration or preservation-minded refresh, matching the correct size and wheel diameter matters more than chasing a period-style sidewall treatment from an earlier era. A 17-inch LaCrosse and a 20-inch LaCrosse do not share the same visual proportions or tire profile. If the car has changed hands or wears replacement wheels, verify the original package through Buick reference material or marque-specific owner communities before making authenticity decisions.

Correct tire fitment can matter on a shown 2014 Buick, especially in preservation, marque, or OEM-style classes where overall appearance and adherence to factory specification are part of the judging standard. Size, wheel diameter, sidewall appearance, and overall stance are usually more visible than brand nuances from a short distance. On a modern Buick such as a 2014 LaCrosse, Regal, or Verano, an incorrect profile or oversized wheel package can change the car's look immediately.

That does not mean every event applies the same standard. Some local shows are far more relaxed than formal judged events, while marque-oriented gatherings may care closely about factory-correct sizing and wheel presentation. If showing accuracy matters to you, verify the car's original wheel package first, then choose the tire size that matches that package rather than treating all 2014 Buick fitments as interchangeable.

On 2014 Buick sizes where both appear, BFGoodrich g-Force Sport COMP-2 and BFGoodrich g-Force COMP-2 A/S share the same basic fitment but differ in exact product specification. In 235/50R18, both carry a 97W rating, while the Sport COMP-2 includes a max load figure of 1,609 pounds at 51 psi. In 245/40R19, the Sport COMP-2 is 98W XL with a 1,653-pound figure at 50 psi, while the COMP-2 A/S is 94W. In 255/35R20, both appear as 97W XL products.

For a 2014 Buick owner comparing products within the same size, those distinctions are meaningful because the tire series is not just a cosmetic naming difference. Load index, XL status, and exact specification can change even when the sidewall size stays the same. The right way to compare them is within your Buick's confirmed size, then against the way the car is actually driven and presented rather than across unrelated diameters.

Yes, the 2014 Buick sizes here are modern radial tires with speed ratings that support highway use when the tires are in good condition and properly matched to the vehicle. W-rated versions carry a 168 mph ceiling, and Y-rated versions carry a 186 mph-or-higher ceiling. Those ratings appear across several 18-, 19-, and 20-inch Buick fitments, while the 17-inch 235/50R17 appears as a W-rated tire.

In real-world use, the tire's speed rating is only one part of the safety picture. A 2014 Buick's condition, alignment, brake health, and actual load matter just as much, and aged rubber can undermine confidence long before the speed rating becomes relevant. For highway driving, the important step is choosing the correct size for the car, keeping pressures correct, and inspecting for age or impact damage before the trip.

Inflation pressure for a 2014 Buick should follow the vehicle's tire placard or owner's manual for everyday use, because factory pressure recommendations are vehicle-specific even when two cars share the same tire size. Tire products in these Buick sizes carry their own maximum load and pressure figures in some cases, such as 235/50R18 up to 1,819 pounds at 50 psi, 245/45R19 up to 1,874 pounds at 50 psi, 245/40R19 up to 1,653 pounds at 50 psi, 245/40R20 up to 1,709 pounds at 50 psi, 255/35R20 up to 1,609 pounds at 50 psi, and 235/45R18 up to 1,653 pounds at 50 psi.

Those numbers are tire-capacity limits, not automatic everyday inflation settings for every 2014 Buick. Do not transfer a pressure figure from one size to another, and do not assume the maximum pressure molded for a tire is the pressure the car should be driven at. Use the Buick placard as the baseline, then confirm that the tire you choose meets the load needs of your specific LaCrosse, Regal, or Verano application.

Before a longer drive in a 2014 Buick, inspect all four tires and the spare for pressure, tread condition, sidewall cracking, cuts, bulges, and any signs of uneven wear. Pay close attention to low-profile 19- and 20-inch tires, since pothole or curb damage can be easier to miss at a glance. Also check valve stems, wheel condition, and whether the tires are all the same size and type that belongs on that particular Buick model.

A tire check should be part of a broader pre-trip inspection on any modern collector or daily-driven Buick, including brakes, fluids, and suspension condition. Tires are often the first clue that something else is off, such as an alignment problem or a bent wheel. If the car has sat for a long period, drive only after the tires have been inspected cold and any age-related concerns have been addressed.