2009 Buick Tire Fitment Guide

2009 Buick vehicles use five tire sizes across two models. The LaCrosse uses 225/60R16, 225/55R17, and 235/50R18, while the Lucerne uses 235/55R17 and 245/50R18. Rim diameters therefore span 16, 17, and 18 inches depending on the model and wheel package. Where rim-width guidance is available, 225/60R16 works on rims from 6.0 to 9.0 inches depending on tire, 225/55R17 from 6.0 to 9.0, 235/50R18 from 6.5 to 8.5, and 235/55R17 from 6.0 to 8.5.

The practical takeaway is that 2009 Buick fitment is model-specific, not universal. A LaCrosse owner may need to sort between three wheel diameters, while a Lucerne owner is choosing between two. Checking the size on the current tire sidewall or the wheel diameter itself is the quickest way to narrow the field before you start comparing brands, sidewall styling, or driving character.

On a 2009 Buick, 225/60R16 is a metric radial size code. The 225 is the nominal section width in millimeters, the 60 is the aspect ratio, meaning the sidewall height is 60 percent of the section width, the R indicates radial construction, and the 16 is the wheel diameter in inches. On 2009 Buick applications, that size belongs to the LaCrosse.

That code matters because each part of it affects fitment. A 16-inch tire cannot replace a 17- or 18-inch tire without changing wheels, and even two tires with similar widths may differ in overall height when the aspect ratio changes. If your LaCrosse currently wears 225/60R16, stay with that size unless you are intentionally changing wheel diameter and have confirmed the full package.

No, 2009 Buick models do not use the same tire size. The LaCrosse and Lucerne each have their own fitment range, and no single size spans both model lines in this year. The LaCrosse uses one 16-inch size, one 17-inch size, and one 18-inch size, while the Lucerne uses one 17-inch size and one 18-inch size.

That makes model identification the first step in the buying process for 2009 Buick tires. If you know only the year and make, you are still one step short of a confident selection. Once you confirm whether the car is a LaCrosse or Lucerne, the remaining choice becomes much simpler and usually comes down to matching the existing wheel diameter and deciding what sidewall style suits the car.

2009 Buick tire choices cover a surprisingly wide range of sidewall styles. The 225/60R16 LaCrosse size is available in Raised Yellow Letter, redline, pin white stripe, and wide whitewall. The 225/55R17 LaCrosse size comes in blackwall and wide whitewall, the 235/50R18 LaCrosse size is blackwall, the 235/55R17 Lucerne size comes in blackwall, goldline, and wide whitewall, and the 245/50R18 Lucerne size comes in RWL and redline.

Styling choice matters because these Buicks can lean either formal or custom depending on the look you want. Whitewalls and goldlines tend to suit Buick’s traditional luxury image, while blackwalls, raised letters, and redlines create a more contemporary or personalized presentation. The right answer is usually less about fitment than about whether the car is being kept close to stock in appearance or given a more individualized stance.

Five brands cover 2009 Buick applications here: Goodyear, BFGoodrich, Nitto, American Classic, and Pro-Trac. The 225/60R16 size is available from Goodyear and BFGoodrich, 225/55R17 from BFGoodrich, 235/50R18 from BFGoodrich and Nitto, 235/55R17 from BFGoodrich and American Classic, and 245/50R18 from Pro-Trac. Every fitment in this group uses radial construction.

Brand choice often follows the kind of Buick you are building. BFGoodrich covers the widest range of late-model performance and collector-style sidewall treatments, American Classic serves the Lucerne owner who wants a more traditional luxury appearance, Goodyear adds a bold custom option in the 16-inch LaCrosse size, and Nitto or Pro-Trac appeal to buyers after a more contemporary street-oriented look.

In 235/50R18 for the 2009 Buick LaCrosse, BFGoodrich offers blackwall g-Force variants and the g-Force Phenom T/A, while Nitto offers the NT555 G2. The BFGoodrich and Nitto options all fit 18-inch wheels, carry W speed ratings in this size, and work within a 6.5- to 8.5-inch rim-width window. Nitto’s NT555 G2 shows a 1,819-pound load figure at 50 psi, while BFGoodrich examples in this size include 1,609 at 51 psi and 1,819 pounds at 50 psi depending on series.

That means the choice is less about basic fitment and more about brand character within the same general size envelope. A buyer comparing them should look closely at load marking, tire weight, and the series’ intended personality, then match that to how the LaCrosse is used. Since they share the same wheel diameter and sidewall format, the finer distinctions come from the individual tire rather than the size code itself.

Rim-width ranges vary by size on 2009 Buick applications. The 225/60R16 tires fall between 6.0 and 9.0 inches depending on the specific tire, 225/55R17 runs from 6.0 to 9.0, 235/50R18 runs from 6.5 to 8.5, and 235/55R17 runs from 6.0 to 8.5. The 245/50R18 products here confirm an 18-inch rim diameter, though a rim-width range is not shown alongside them.

That spread is why wheel width should be confirmed before final selection, especially if the car has aftermarket wheels. Two tires with the same nominal size may still have different approved rim-width ranges by brand or series. Matching the tire to the actual wheel, not just the sidewall code, helps preserve proper tread shape, steering response, and clearance on a 2009 Buick.

The 2009 Buick tire sizes here are modern radial fitments and their size markings do not show tube-type notation. That points toward tubeless construction across these products rather than classic tube-type service. Nothing in these 16-, 17-, and 18-inch Buick applications suggests the kind of early wheel design that normally forces a tube requirement in collector vehicles.

Even so, the wheel itself still matters. If a 2009 Buick is wearing damaged factory wheels or unusual aftermarket rims, sealing issues can appear even with tubeless tires. Confirm the wheel condition, bead seat condition, and valve stem choice during installation so the tire and wheel work together as intended, especially on a sedan that may sit for long stretches between drives.

A 2009 Buick should be stored on clean, properly inflated tires in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment. Radial tires generally tolerate storage better than old bias-ply tires, but they can still age prematurely if they sit under load for long periods on a damp floor or in a hot building. Tire covers and a clean concrete or barrier surface under the tires help.

Moving the car periodically is better than letting it sit in one spot for months at a time. If the Buick will be parked for an extended season, some owners use stands to reduce load on the tires and suspension, though the suspension should not hang unsupported. The goal is simple: protect the rubber from heat, ozone, moisture, and long static compression.

On a 2009 Buick, tire age usually matters more than mileage because many of these cars now live collector-style lives with low annual use. A good rule is to begin close inspection once tires reach the five- to seven-year range and to treat around ten years from the DOT date code as a serious replacement point, even if tread depth still looks acceptable. Heat cycles, storage conditions, and inflation history all affect the real timeline.

That means a lightly driven Buick can still need tires that appear visually decent at first glance. Sidewall hardening, internal aging, and small cracks often matter more than wear bars on a car that comes out mainly for weekend drives. Checking the DOT date code and comparing age alongside condition gives a much better picture than judging by tread alone.

Tires on a 2009 Buick should be inspected before every drive and again before any longer highway outing. Look for sidewall cracking, tread separation, bulges, punctures, irregular wear, and slow pressure loss. Because these are tubeless radial applications, valve stems, bead sealing areas, and wheel condition deserve attention along with the tire itself.

Routine inspection is especially important on cars that are driven infrequently, because age-related problems can advance while mileage stays low. A quick walk-around before leaving home catches many of the issues that strand collector cars later in the day. If the Buick has been parked for weeks or months, add a pressure check and inspect the spare before heading out.

The 2009 Buick LaCrosse was originally a modern radial-tire car, not a bias-ply-era vehicle. Within this year and model line, LaCrosse fitments use 225/60R16, 225/55R17, or 235/50R18 depending on wheel package. Since 2009 Buick sat well into the radial era, the key originality question is usually the correct size and wheel diameter for the specific car rather than a bias-versus-radial decision.

For a restoration-minded owner, that means checking the door placard, original wheel package, and any surviving delivery paperwork before settling on a replacement size. Sidewall appearance is the next authenticity decision, because some owners prefer a more factory-like blackwall look while others choose a whitewall or accent stripe to emphasize Buick’s traditional image. If the car will be judged, event-specific standards are worth confirming with Buick marque experts.

Yes, correct tire fitment matters on a 2009 Buick if the car is being presented seriously at shows. On a modern-era Buick, judges and knowledgeable enthusiasts will usually notice an obviously incorrect wheel diameter, sidewall treatment that clashes with the car’s trim and presentation, or a size that changes the stance in a way that looks out of character. The right radial size is the first authenticity checkpoint.

That does not always mean every show car needs the exact same visual approach. A stock-preservation Lucerne may look most at home on restrained sidewall styling, while a custom-oriented LaCrosse can carry a more expressive look and still be coherent. The important thing is consistency with the build theme and the event’s standards, especially if originality rather than personalization is the goal.

In 235/55R17 for the 2009 Buick Lucerne, BFGoodrich covers blackwall performance-oriented choices, while American Classic offers goldline and 1.75-inch wide whitewall versions with an asymmetrical tread design. Both use radial construction and fit 17-inch rims, with BFGoodrich examples and American Classic tires both working within a 6.0- to 8.5-inch wheel-width range in this size family. American Classic examples carry a 1,653-pound load figure at 35 psi, while a BFGoodrich Phenom example shows 1,929 pounds at 50 psi.

That makes the distinction clear for a Lucerne owner. American Classic leans toward a more traditional Buick luxury presentation, while BFGoodrich leans toward a more modern blackwall look with higher-performance visual cues. Since both fit the same basic wheel diameter, the choice usually comes down to the appearance you want and whether your priorities are period-flavored styling or a more contemporary stance.

Yes, 2009 Buick tires in these sizes can be appropriate for highway driving when they are the correct size, properly inflated, and in sound condition. The speed-rated products shown in 225/55R17, 235/50R18, and 235/55R17 carry W ratings, which correspond to a 168 mph ceiling. That is far beyond normal U.S. highway use and well above the speeds these comfort-oriented Buick sedans are likely to see in ordinary service.

The more important safety factors are usually age, condition, inflation pressure, and the condition of the Buick itself. Brake performance, alignment, suspension wear, and wheel integrity matter just as much as the speed symbol on the sidewall during real-world driving. A fresh, properly matched tire on a healthy car is what builds confidence on the highway, not an impressive speed letter by itself.

Inflation pressure on a 2009 Buick should follow the vehicle placard or owner’s manual for normal service, while the tire’s own load-and-pressure marking sets the product’s upper-rated limit. Available load-and-pressure figures vary by size and tire: 225/60R16 examples show 1,609 pounds at 44 psi and 1,609 at 34 psi, 225/55R17 examples include 1,609 at 51 psi and 1,819 at 50 psi, 235/50R18 examples include 1,609 at 51 psi and 1,819 at 50 psi, and 235/55R17 examples include 1,653 at 35 psi and 1,929 at 50 psi.

Those figures should not be treated as one universal setting for every 2009 Buick. They describe the tire’s rated capacity at a given pressure, not necessarily the carmaker’s recommended operating pressure for your specific sedan. Use the factory recommendation as your starting point, then verify that the chosen tire is operating within its approved range and carrying the car correctly.

Before taking a 2009 Buick on a longer drive, inspect all four tires and the spare for cracking, punctures, cuts, bulges, and uneven wear. Confirm cold inflation pressure, check valve stems for age or cracking, and make sure the tread surfaces are free of embedded damage. Since these cars may sit between outings, age-related issues can appear even when the tires still have plenty of tread depth.

The tire check should be part of a broader once-over that includes brakes, fluid levels, battery condition, and suspension feel on the road. A Lucerne or LaCrosse in good mechanical condition is usually a comfortable highway car, but comfort can hide early warning signs if you rush the preparation. Spending a few minutes on the tires first is one of the simplest ways to avoid turning a pleasant trip into a roadside delay.