2010 Buick Tire Fitment Guide

2010 Buick vehicles use five distinct tire sizes across two models. The LaCrosse uses 245/50R17, 235/50R18, and 245/40R19, while the Lucerne uses 235/55R17 and 245/50R18. Rim diameter varies by size, with 17-, 18-, and 19-inch applications represented, so these are not interchangeable simply because they belong to the same year and make.

The practical takeaway is that year and make alone are not enough for a correct selection on a 2010 Buick. Start by confirming whether the car is a LaCrosse or a Lucerne, then verify the wheel diameter already on the car. Once that is settled, you can compare sidewall styling, brand options, and published load or speed characteristics within the correct size.

On a 2010 Buick, 235/50R18 is a metric radial size. The 235 is the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. That fitment belongs to the LaCrosse and is used on an 18-inch wheel.

Reading the code correctly helps prevent one of the most common late-model fitment mistakes: matching section width but missing the wheel diameter or sidewall height. A 235/50R18 is not a substitute for a 235/55R17 or a 245/50R18 just because some of the numbers look close. On a 2010 Buick, the complete size code needs to match the car’s model and wheel package.

No, 2010 Buick models do not use the same tire size. The LaCrosse and Lucerne each have their own fitment range, and none of the five sizes is shared across both models in the year-make range shown here. The LaCrosse spans three sizes, while the Lucerne uses two different sizes.

That matters because a Lucerne owner cannot assume a LaCrosse size will fit correctly, even when both cars wear similar wheel diameters. Buick positioned these sedans differently, and their tire fitments reflect that. If the car has replacement wheels or you are buying for a recently acquired vehicle, check the model badge and the current tire sidewall before moving to a model-specific or size-specific page.

Sidewall appearance varies quite a bit across 2010 Buick sizes. The 235/50R18 and 245/40R19 sizes for the LaCrosse are available in blackwall form, while the Lucerne’s 235/55R17 size adds goldline and wide whitewall choices alongside blackwall. The Lucerne’s 245/50R18 size also offers RWL and redline sidewall treatments.

For a factory-like late-model look, blackwall is the most natural choice on a 2010 Buick. Goldline, wide whitewall, redline, and raised white letter treatments shift the car’s character more toward custom, nostalgic, or boulevard styling rather than strict showroom appearance. Lucerne owners have more visual flexibility, while LaCrosse owners are more centered on contemporary blackwall presentation.

Several brands cover 2010 Buick fitments, depending on size. BFGoodrich appears in 235/50R18, 245/40R19, and 235/55R17, Nitto is available in 235/50R18, American Classic covers 235/55R17, and Pro-Trac covers 245/50R18. Brand choice is tied closely to the exact tire size and the sidewall look you want.

That brand spread means the selection process starts with fitment and only then moves to styling or tread family. A LaCrosse owner on 19-inch wheels is choosing within a narrower group than a Lucerne owner on 17-inch wheels, where blackwall, goldline, and wide whitewall options all exist. Once the size is confirmed, comparing brands becomes much more straightforward.

Within the 2010 Buick 235/50R18 fitment, BFGoodrich and Nitto both offer blackwall radial choices, and their basic wheel fit range overlaps at 18 inches with a 6.5- to 8.5-inch rim width span. Published load figures reach 1,609 pounds at 51 psi on one BFGoodrich version and 1,819 pounds at 50 psi on the Nitto NT555 G2 and one BFGoodrich Phenom version. Product weights also vary, with examples around 26 to 29 pounds.

Those differences matter most when you are narrowing the choice within the same size rather than deciding whether the size fits the car. Buyers who want to compare more closely should look at the specific series, published load figure, and wheel-width compatibility of the exact tire they are considering. Keeping the comparison inside the same 235/50R18 fitment avoids crossing into a size that belongs to a different Buick application.

Rim width guidance is available for several 2010 Buick sizes. The 235/50R18 fitment works with roughly 6.5 to 8.5 inches of rim width, the 245/40R19 fitment with about 8.0 to 9.5 inches, and the 235/55R17 fitment with about 6.0 to 8.5 inches depending on the exact tire. Those ranges apply to the tire size itself, not automatically to every wheel that may have been installed on the car over the years.

If a 2010 Buick has aftermarket wheels, this check becomes especially important. A tire can match the sidewall size code and still be mismatched to the wheel if the rim width falls outside the manufacturer’s approved range. Before choosing a tire, measure or verify the wheel width so the final selection suits both the car’s fitment and the wheel already in service.

The 2010 Buick sizes covered here are modern radial fitments, and none of the available products is marked as tube-type. That points to tubeless construction across the published 17-, 18-, and 19-inch applications. Tube use is not part of the normal setup for these Buick sizes.

Even so, tubeless operation still depends on wheel condition and valve-stem integrity. If the wheels are original, inspect the bead seats for corrosion and replace aging valve stems during tire service. That is especially worthwhile on a 2010 Buick that has sat for long periods, because air retention problems often come from the wheel or valve area rather than the tire itself.

A 2010 Buick should be stored on clean, properly inflated tires in a cool, dry, dark space away from direct sunlight, electric motors, welders, furnaces, and other ozone sources. Radial tires generally tolerate storage better than older bias-ply designs, but they still age from heat, UV exposure, and long periods of inactivity. Keeping the car on a dry surface rather than bare earth or damp concrete also helps.

For a Buick that sits between seasonal drives, moving the car periodically can help avoid localized stress on one part of the casing. If storage will be extended, some owners use tire cradles or stands to reduce the static load, though normal inflation and occasional movement are often enough for shorter layups. A simple storage routine does more for tire life than many owners realize.

On a 2010 Buick, tire age matters as much as tread depth, and often more. A good rule is to begin evaluating tires closely once they reach about five to seven years of service and to give serious replacement consideration as they approach ten years, even if the tread still looks usable. The DOT date code on the sidewall identifies the week and year of manufacture.

That approach is especially important on Buicks that see low annual mileage, because collector-style use can leave plenty of tread on a tire that has already aged out. Cracking, hardening, vibration, and poor wet-weather confidence can all show up long before the tread is gone. A newer tire with modest mileage is usually preferable to an older tire that only looks serviceable at a glance.

Tires on a 2010 Buick should be inspected before every drive and again before any longer highway trip. Look for sidewall cracking, punctures, bulges, uneven tread wear, and any sign that the tire has been run low on air. Pressure should be checked when the tires are cold so the reading is meaningful.

Regular inspection is one of the easiest ways to catch aging or alignment issues before they turn into a roadside problem. On a modern Buick sedan, irregular shoulder wear or a change in steering feel can point to inflation or chassis issues as much as tire wear itself. A quick walkaround before driving is inexpensive insurance, especially if the car is used only occasionally.

A 2010 Buick LaCrosse belongs to the modern era of factory radial tire use, so radial construction is the correct baseline for original-style fitment. Within the LaCrosse range here, the applicable sizes are 245/50R17, 235/50R18, and 245/40R19 depending on the wheel package. The right original-style choice starts with matching the exact size and wheel diameter the car was built around.

For a stock-appearing restoration or preservation-minded car, staying with the correct radial size matters more than chasing a vintage-style sidewall treatment that would look out of period on a 2010 sedan. If the car’s build history or trim package is in question, the best next step is to confirm the door placard, owner’s literature, or a marque specialist before finalizing the tire selection.

Yes, correct tire fitment matters on a shown 2010 Buick, even though it is a much newer car than the traditional collector vehicles most people picture. Judges and knowledgeable enthusiasts will notice if the car carries the wrong size, an obviously mismatched wheel diameter, or a sidewall style that clashes with the car’s original character. On a 2010 Buick, radial construction is expected, so the finer points become size accuracy and overall presentation.

That means a stock LaCrosse or Lucerne generally benefits from a clean, appropriate late-model appearance, while custom sidewall treatments make more sense on a personalized build than on a factory-faithful one. Event standards vary, especially as newer collector cars enter judged classes, so owners who want to be exact should check with the hosting club or Buick-focused community before the car is prepared for display.

For the 2010 Buick Lucerne in 235/55R17, BFGoodrich and American Classic serve different visual purposes while staying within the same radial fitment. BFGoodrich appears in blackwall form, while American Classic adds goldline and 1.75-inch wide whitewall choices. Published load figures reach 1,929 pounds at 50 psi on one BFGoodrich version and 1,653 pounds at 35 psi on the American Classic versions.

That makes the choice less about whether the size fits and more about the look you want the Lucerne to project. A blackwall tire keeps the car closer to a contemporary OEM-style presentation, while goldline or wide whitewall styling pushes it toward a more personalized or nostalgic appearance. Either way, staying within 235/55R17 keeps the fitment aligned with the Lucerne application.

Yes, the radial tires used on 2010 Buick applications are suitable for normal highway use when they are the correct size, in sound condition, and properly inflated. Speed ratings present in these sizes include W, which carries a 168 mph ceiling, and Y, which carries a 186 mph-or-higher ceiling. Those ratings are well beyond ordinary legal highway speeds in the United States.

In real-world use, the bigger safety concern on a 2010 Buick is usually tire age, inflation, impact damage, or neglected alignment rather than the published speed category itself. A fresh, correctly matched tire in the proper size is the goal. Owners should also remember that the car’s brakes, suspension condition, and overall maintenance still govern how confidently it handles long-distance highway driving.

Inflation pressure for a 2010 Buick should follow the vehicle placard or owner’s manual for normal service, because the correct operating pressure depends on the exact model, wheel package, and loading condition. Some of these tires also carry published maximum load-and-pressure figures, such as 1,609 pounds at 51 psi for one 235/50R18 application, 1,819 pounds at 50 psi for another 235/50R18 version, 1,653 pounds at 35 psi or 1,929 pounds at 50 psi in 235/55R17, and 1,653 pounds at 50 psi in 245/40R19.

Those figures are not blanket recommended running pressures for every 2010 Buick. They show the pressure tied to a tire’s rated maximum load, which is a different question from the vehicle manufacturer’s normal-use recommendation. Keep the pressure matched to the car and size you actually have, and avoid borrowing a pressure number from one Buick model or tire size for another.

Before a longer trip in a 2010 Buick, inspect each tire for cracking, cuts, punctures, bulges, irregular wear, and correct cold inflation pressure. Check the valve stems, confirm the spare is usable, and make sure wheel hardware is secure. A close look at tread condition and age is just as important as confirming that the size on the car matches the intended Buick application.

That tire check should be part of a broader pre-drive routine on any aging modern car. Fluids, brakes, battery condition, lights, and suspension all deserve attention before distance travel, especially if the Buick has been sitting. When the tire sidewalls, pressures, and overall condition are sorted first, the rest of the trip preparation becomes much easier and more confidence-inspiring.