In 2005, Buick straddled two identities at once, serving traditional full-size sedan buyers while also moving toward a newer midsize lineup with the LaCrosse. That gives 2005 Buick an unusually broad tire story, spanning comfort-oriented sedans such as the LeSabre and Park Avenue as well as the outgoing Century and the newer LaCrosse. Four models use five radial sizes overall, with one shared size appearing across the full range and several model-specific sizes tied to particular body and wheel packages. The first thing to confirm on a 2005 Buick is the exact model, then the wheel diameter already on the car, before narrowing down the right tire size.
Which Tire Size Is Right for Your 2005 Buick
Five tire sizes are used across 2005 Buick vehicles, and they vary by model rather than carrying across the entire range. The main decision is confirming the correct model and wheel diameter first, since these sizes span 15-, 16-, and 17-inch fitments even though all are radial constructions. Understanding that distinction before choosing a product saves time and helps match the tire to the right Buick.
Year(s): 2005|Fit(s): Century|Construction: Radial|Rim: 15 in
205/70R15 is a metric radial size with a 205-millimeter section width, a 70-series aspect ratio, and a 15-inch rim diameter. It is available from Maxxis, Michelin, Avon, and American Classic in blackwall, narrow whitewall, and wide whitewall styles, with speed ratings varying by product from V at 149 mph to W at 168 mph. This size is specific to the 2005 Buick Century rather than universal across the year and make. It suits Century owners who want to stay with the model's 15-inch fitment while choosing between a cleaner blackwall look or a more traditional whitewall presentation.
Year(s): 2005|Fit(s): Century, LaCrosse, LeSabre, Park Avenue|Construction: Radial|Rim: 16 in
225/60R16 is a metric radial size with a 225-millimeter section width, a 60-series aspect ratio, and a 16-inch rim diameter. It is available from Goodyear and BFGoodrich in raised yellow letter, redline, pin white stripe, and wide whitewall styles, with load capacities reaching 1,609 pounds depending on the product. This is the one size shared across every 2005 Buick model covered here, making it the broadest cross-model fitment in the range. It is the logical place to start for buyers with 16-inch wheels who want either a sporty sidewall treatment or a more traditional Buick-friendly whitewall look.
Year(s): 2005|Fit(s): LaCrosse|Construction: Radial|Rim: 17 in
225/55R17 is a metric radial size with a 225-millimeter section width, a 55-series aspect ratio, and a 17-inch rim diameter. It is available from BFGoodrich in blackwall and wide whitewall styles, with speed ratings varying by product and including W at 168 mph, while load capacity can reach 1,819 pounds on certain versions. This size is specific to the 2005 Buick LaCrosse rather than shared across the whole Buick lineup. It gives LaCrosse owners a choice between contemporary blackwall performance-oriented products and a whitewall radial that better matches Buick tradition.
Year(s): 2005|Fit(s): LeSabre|Construction: Radial|Rim: 15 in
215/70R15 is a metric radial size with a 215-millimeter section width, a 70-series aspect ratio, and a 15-inch rim diameter. It is available from Cooper, BFGoodrich, Dunlop, and Avon in RWL, wide whitewall, and blackwall styles, with speed ratings varying by product from V at 149 mph to W at 168 mph and load capacities running up to 1,653 pounds depending on the tire. This size is specific to the 2005 Buick LeSabre, so it should not be treated as a universal 15-inch Buick fitment. It is a strong match for LeSabre owners who want to preserve the car's comfort-sedan character while choosing either a traditional whitewall or a more understated blackwall appearance.
Year(s): 2005|Fit(s): Park Avenue|Construction: Radial|Rim: 17 in
235/55R17 is a metric radial size with a 235-millimeter section width, a 55-series aspect ratio, and a 17-inch rim diameter. It is available from BFGoodrich and American Classic in blackwall, goldline, and wide whitewall styles, with W-rated options carrying a 168 mph ceiling and load capacities reaching 1,929 pounds depending on the product. This size is specific to the 2005 Buick Park Avenue and reflects that model's distinct 17-inch fitment within the Buick range. It is the right path for Park Avenue owners who want either a modern blackwall presentation or a more upscale period-flavored sidewall style.
Four Buick models are covered for 2005, and they do not all use the same tire size. One 16-inch size overlaps across the full lineup, but each model also has its own model-specific fitment path depending on wheel diameter and package. Select a model below for model-specific fitment history and products.
2005 Buick Century
The Century was Buick's long-running midsize sedan, known in its final years for straightforward comfort and familiar front-drive Buick packaging. In 2005 it uses either a 15-inch or 16-inch tire fitment, so Century owners should confirm which wheel diameter is actually on the car before choosing a replacement.
The LaCrosse arrived as Buick's newer midsize sedan, replacing the Century with a more modern look and a broader appeal. Its tire choices mount on either 16-inch or 17-inch wheels, making model and wheel confirmation especially important before narrowing down sidewall style or tire character.
The LeSabre remained Buick's familiar full-size front-drive sedan, valued for ride comfort, easy road manners, and traditional Buick character. It uses either a 15-inch or 16-inch tire fitment, with the 15-inch choice standing apart from the other models that also share the 16-inch size.
Associated Tire Sizes:
215/70R15 — radial, traditional full-size sedan look
The Park Avenue sat near the top of Buick's sedan range in 2005, carrying a more formal, upscale personality than the division's midsize cars. Its tires mount on either 16-inch or 17-inch wheels, and the 17-inch size is unique to Park Avenue within this group.
Twenty-seven products are available across five tire sizes for 2005 Buick vehicles. 205/70R15 comes from Maxxis, Michelin, Avon, and American Classic in radial blackwall and whitewall styles; 225/60R16 from Goodyear and BFGoodrich in radial raised yellow letter, redline, pin white, and wide whitewall styles; 225/55R17 from BFGoodrich in radial blackwall and wide whitewall; 215/70R15 from Cooper, BFGoodrich, Dunlop, and Avon in radial RWL, blackwall, and wide whitewall; 235/55R17 from BFGoodrich and American Classic in radial blackwall, goldline, and wide whitewall styles.
These FAQs sort out which tire size belongs to each 2005 Buick model, how the 15-, 16-, and 17-inch fitments differ, what sidewall styles and brands exist within each size, and what to check before driving or storing a low-use modern Buick.
Size Basics & Fitment
What tire sizes fit 2005 Buick vehicles?
2005 Buick vehicles use five radial sizes across four models: 205/70R15 for Century, 215/70R15 for LeSabre, 225/55R17 for LaCrosse, 235/55R17 for Park Avenue, and 225/60R16 across Century, LaCrosse, LeSabre, and Park Avenue. Rim diameters therefore span 15, 16, and 17 inches depending on model and wheel package. Rim width ranges also vary by size, running from 5.00 to 7.50 inches on the 205/70R15 products, 5.5 to 7.5 on 215/70R15, 6.0 to 9.0 on 225/60R16, 6.0 to 9.0 on 225/55R17, and 6.0 to 8.5 on 235/55R17.
That means year and make alone are not enough to choose correctly for a 2005 Buick. Start by identifying the exact model, then confirm whether the car currently has 15-, 16-, or 17-inch wheels before narrowing down sidewall style or brand preference. If the car has been changed from its original wheel package, the wheel diameter on the car matters more than the other fitments used somewhere else in the Buick range.
What does 205/70R15 mean on a 2005 Buick tire?
On a 2005 Buick, 205/70R15 is a metric radial code. The 205 is the nominal section width in millimeters, 70 is the aspect ratio, the R means radial construction, and 15 is the wheel diameter in inches. Within the 2005 Buick range, that size belongs to the Century. Products in this size fit 15-inch wheels and cover rim widths from 5.00 to 7.50 inches depending on the tire.
That decoding matters because a 205/70R15 is not interchangeable with Buick's 16-inch or 17-inch fitments without a wheel change. It also helps explain why one Century may wear a taller-sidewall 15-inch tire while another uses the shared 225/60R16 fitment instead. Once the size on the sidewall matches the wheel, the next choice becomes appearance, such as blackwall, narrow whitewall, or wide whitewall.
Do all 2005 Buick models use the same tire size?
No. The only size shared across all 2005 Buick models here is 225/60R16, which fits Century, LaCrosse, LeSabre, and Park Avenue. Century also uses 205/70R15, LaCrosse also uses 225/55R17, LeSabre also uses 215/70R15, and Park Avenue also uses 235/55R17. Every size in the 2005 Buick range is a radial, but the wheel diameters and sidewall profiles differ from one model fitment to another.
That model variation means buyers should identify the exact Buick before treating any online tire reference as interchangeable across the brand. A LeSabre owner and a Park Avenue owner may both see 225/60R16 as an option, yet each model also has another fitment path that changes wheel diameter and available product styles. Using the model name first prevents mistakes and keeps the search focused on the correct wheel package.
Buying the Right Tire
What sidewall styles are available for 2005 Buick tires?
2005 Buick tires are available in a wide spread of sidewall styles depending on size. 205/70R15 comes in blackwall, narrow whitewall, and wide whitewall. 225/60R16 adds raised yellow letter, redline, pin white stripe, and wide whitewall. 225/55R17 offers blackwall and wide whitewall, 215/70R15 offers RWL, blackwall, and wide whitewall, and 235/55R17 offers blackwall, goldline, and wide whitewall.
For a Buick of this era, whitewall styles usually feel the most in character with the brand's comfort-luxury identity, while blackwall, RWL, or raised-letter treatments push the appearance in a sportier or more custom direction. The right choice depends less on fitment than on how original, understated, or personalized you want the car to look. Sidewall style is one of the easiest ways to tune the personality of a 2005 Buick without changing wheel size.
What brands make tires for 2005 Buick vehicles?
Several brands cover 2005 Buick fitments, and the brand mix changes by size. 205/70R15 is available from Maxxis, Michelin, Avon, and American Classic. 225/60R16 is available from Goodyear and BFGoodrich. 225/55R17 comes from BFGoodrich, 215/70R15 from Cooper, BFGoodrich, Dunlop, and Avon, and 235/55R17 from BFGoodrich and American Classic.
That spread gives Buick owners room to prioritize appearance, brand preference, or the character of the tire without leaving the correct size. Some sizes lean more traditional with whitewall choices, while others have a more performance-flavored mix dominated by blackwalls and higher speed ratings. If you already know your exact size, comparing the brands within that one fitment is usually more useful than comparing across the whole 2005 Buick range.
What is the difference between BFGoodrich Silvertown Radial and Goodyear Eagle NASCAR in 225/60R16 for 2005 Buick vehicles?
In 225/60R16 for 2005 Buick vehicles, the Goodyear Eagle NASCAR uses a raised yellow letter sidewall, carries a 1,609-pound load rating at 44 psi, fits 6.0- to 7.0-inch rims, and weighs about 24 pounds. BFGoodrich Silvertown Radial versions in the same size come in redline, pin white stripe, and wide whitewall styles, fit a broader 6.00- to 9.00-inch rim range, weigh about 28 pounds, and some versions also carry a 1,609-pound load rating, though one pin-white version is rated at 1,609 pounds at 34 psi.
The practical difference is appearance and wheel compatibility more than basic fitment. A Buick owner after a sporty, period-inspired muscle-era accent may lean toward the raised yellow letter Goodyear, while someone preserving a more traditional Buick look may prefer one of the Silvertown sidewall treatments. The broader rim-width span on the BFGoodrich options can also matter if the car is running aftermarket 16-inch wheels rather than factory-width rims.
Fitting & Setup
What rim width do 2005 Buick tires require?
Rim width depends on the exact 2005 Buick tire size. 205/70R15 products fit roughly 5.00 to 7.50 inches depending on brand, while 215/70R15 products generally fit 5.5 to 7.5 inches where a rim-width range is given. 225/60R16 products fit from 6.0 to 9.0 inches, 225/55R17 from 6.0 to 9.0 inches, and 235/55R17 from 6.0 to 8.5 inches. Those ranges belong to the tire size, not to every wheel Buick used.
Before replacing tires on a 2005 Buick, measure or verify the actual wheel width rather than assuming any rim with the right diameter will work. This matters most when a car has aftermarket wheels or a different trim package than expected. Staying within the tire maker's approved rim-width range helps maintain proper sidewall shape, tread contact, and steering response without stretching or pinching the tire.
Do 2005 Buick tires require inner tubes?
At least one 2005 Buick size is clearly tubeless: the Michelin 205/70VR15 carries a TL marking, which identifies it as a tubeless radial. The other sizes here are sold as modern radial passenger tires and are typically run on tubeless-compatible wheels, but tube markings are not repeated across every product in the range. No 2005 Buick fitment here is presented as a dedicated tube-type collector tire.
The best approach is to match the tire's sidewall marking to the wheel you are using, especially if the car has older replacement wheels or wheels that have seen corrosion around the bead area. A sound tubeless wheel and a tubeless-marked tire are the normal combination for a 2005 Buick. If there is any doubt about wheel condition, have the wheel inspected before mounting new tires.
Maintenance, Storage & Longevity
How should I store a 2005 Buick when the tires are fitted?
A stored 2005 Buick should sit in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, and other ozone sources that can age rubber. Keep the tires properly inflated, move the car occasionally so it does not rest on one contact patch for months, and avoid standing water or bare dirt floors. Because every fitment here is radial, long static storage is generally easier on the tire than it would be with an older bias-ply design, but flat-spotting can still occur.
If the car will be parked for a full season, using tire cradles or placing the vehicle on stands can reduce stress on the casing and help preserve ride quality. A breathable car cover and a clean storage area do more for tire life than many owners realize. The goal is to reduce heat, ozone, moisture, and constant load on one spot of the tread.
How long do tires on a 2005 Buick typically last?
On a low-use 2005 Buick, age is usually more important than mileage. A sensible rule is to start evaluating tires closely around five to seven years of age and to consider replacement around ten years, even if tread depth still looks generous. The DOT date code on the sidewall is the quickest way to tell when a tire was made. Collector and weekend-driven cars often age out their tires before they wear them out.
That matters because a clean-looking whitewall or blackwall can still be old enough to lose flexibility and road confidence. Regular inspections, proper inflation, and indoor storage can extend useful life, but they do not stop the rubber-aging clock. If a 2005 Buick still wears older tires with good tread, the date code should weigh heavily in the replacement decision.
How often should tires on a 2005 Buick be inspected?
Tires on a 2005 Buick should be inspected before every drive and more thoroughly before any extended highway outing. Check inflation pressure, sidewall cracking, tread wear, cuts, bulges, and any sign that the tire has been run low. Also look at the valve stems, especially on cars that spend long periods parked, because rubber stems can age just like tires do.
Frequent inspection is especially worthwhile on a lightly used Buick because infrequent driving can hide slow leaks and age-related cracking until the car is finally taken out for a longer trip. A two-minute walkaround catches many issues early. If the car has a trunk spare, inspect that tire too, since an old or flat spare can turn a minor problem into a stranded car.
Restoration & Authenticity
What tires were originally fitted to the 2005 Buick Century?
A 2005 Buick Century would have been equipped with modern radial passenger-car tires, not vintage-style bias-ply construction. Within the 2005 Buick range, Century uses either 205/70R15 or 225/60R16 depending on wheel package. Sidewall appearance from the factory era would generally have been more contemporary than the broad whitewall styles now available in some reproduction-oriented products. If originality matters closely, the right place to confirm the exact original fitment is the car's tire placard, owner's literature, or a Buick marque specialist.
That distinction matters because a tire can be the correct size for a Century while still changing the car's visual character significantly. A modern blackwall usually looks closest to mainstream original-equipment practice for a mid-2000s Buick, while wide whitewalls and other period-style accents create a custom or nostalgic look. Owners building a judged car should verify both the size and the sidewall treatment expected for their specific trim and wheel package.
Does correct tire fitment matter for showing a 2005 Buick?
Yes, correct tire fitment matters on a shown 2005 Buick, though the judging emphasis is usually different from that of a prewar or muscle-era car. Size, overall stance, construction type, and sidewall appearance all affect whether the car looks true to its year and model. Since these Buicks use radial tires, the more likely authenticity questions involve choosing the right 15-, 16-, or 17-inch fitment and matching the sidewall style to the car's original presentation rather than debating bias-ply versus radial.
For a serious show car, a whitewall width, blackwall finish, or raised-letter treatment that looks out of place can draw attention even if the tire physically fits. A Park Avenue with a tasteful wide whitewall may suit a personalized presentation, while a stock-oriented LaCrosse often looks more at home on a plain blackwall. Event standards vary, so local Buick clubs and marque judges are the best sources for final authenticity expectations.
What is the difference between BFGoodrich g-Force Comp 2 AS and BFGoodrich Silvertown Radial for 2005 Buick vehicles?
On 2005 Buick fitments, BFGoodrich g-Force Comp 2 AS appears in performance-flavored blackwall 17-inch sizes such as 225/55ZR17 and 235/55ZR17, with W-rated speed capability to 168 mph and rim-width ranges of 6.0 to 8.0 inches or 6.5 to 8.5 inches depending on size. BFGoodrich Silvertown Radial appears in more appearance-driven sizes such as 225/60R16, 225/55R17, and 215/70R15, with sidewall treatments that include redline, pin white stripe, and wide whitewall, plus broader rim-width allowances in some applications.
That makes the choice largely one of visual direction and vehicle character. A g-Force tire gives a 2005 Buick a more contemporary, sporty presentation, especially on 17-inch applications. A Silvertown Radial keeps the car within the right size while introducing a more traditional sidewall treatment that better echoes Buick's long comfort-luxury image. Both are radial choices, but they speak to very different restoration or personalization goals.
Safety & Road Use
Are 2005 Buick tires safe for highway driving?
Yes, 2005 Buick tires in these sizes are suitable for highway use when they are the correct size, properly inflated, and in sound condition. Several products carry V or W speed ratings, which correspond to 149 mph and 168 mph ceilings respectively, including options in 205/70R15, 215/70R15, 225/55R17, and 235/55R17. Even so, a 2005 Buick's real-world highway confidence depends just as much on alignment, suspension condition, brakes, and tire age as it does on the speed letter molded into the sidewall.
For normal highway travel, the bigger concern is usually condition rather than outright speed capability. A fresh, properly matched radial in the right size is far safer than an aged tire with plenty of tread but hidden rubber deterioration. Before a long trip, confirm even wear, stable pressure, and no visible cracking or bulges so the tire's highway manners match the car's intended comfort-oriented design.
What inflation pressure should I use for 2005 Buick tires?
Inflation pressure on a 2005 Buick should follow the vehicle placard or owner's manual for the original application, then be checked against the tire maker's own specifications for the exact reproduction or replacement tire. The tires here show different maximum load and pressure figures by size and product, including 1499 pounds at 35 psi for some 205/70R15 versions, 1609 pounds at 44 psi or 34 psi for certain 225/60R16 versions, 1620 pounds at 35 psi and 1653 pounds for some 215/70R15 versions, and up to 1929 pounds at 50 psi on a 235/55R17 product.
Those figures are not universal inflation recommendations for every 2005 Buick. They are load-and-pressure limits tied to specific tires, and one size's figure should never be transferred to another size or another model. Use the car's factory guidance as the starting point for routine service pressure, then verify that the chosen tire is appropriate for that operating range and load requirement.
What should I check before taking a 2005 Buick on a longer drive?
Before a longer drive in a 2005 Buick, inspect every tire for cracking, cuts, punctures, bulges, and uneven wear, then set pressures cold and confirm the valve stems are sound. Check that all four tires match the size required for the car's wheel package, and inspect the spare as well. Because these Buicks can carry 15-, 16-, or 17-inch fitments depending on model, it is worth confirming that a previous owner did not mix wheel and tire combinations in a way that leaves one corner mismatched.
Tires are only one part of the pre-trip picture, but they are the part touching the road. Pair the tire check with a quick review of brakes, fluids, belts, lights, and battery condition, especially if the car spends long periods parked between outings. A careful once-over before departure is cheap insurance on a car whose comfort and road manners depend heavily on proper tire condition.
