The 2004 Buick Trucks Rainier came from an era when Buick gave a midsize SUV a more upscale identity, blending truck-based utility with a smoother, more premium road-going character. For owners today, that means tire choice affects not just fitment, but also stance, ride feel, and the overall look of the vehicle. The 2004 Buick Trucks Rainier uses radial tires in two primary sizes, 245/65R17 and 255/60R17, both built for 17-inch wheels. Fitment can vary by sub-model, and the available product selection also brings sidewall and tire-series differences into the decision. Before choosing, it helps to confirm the exact trim and wheel setup currently on the vehicle.
Which Tire Size Is Right for The 2004 Buick Trucks Rainier
The 2004 Buick Trucks Rainier uses two primary tire sizes, and the right one depends on the exact sub-model. Both sizes are radial tires for 17-inch wheels, so the key first step is confirming whether your Rainier is a CXL or CXL Plus, and whether it is a 4x2 or 4x4. Once that is settled, the decision shifts to choosing the tire style and specifications that best match how the SUV is driven and presented.
245/65R17 is a metric radial size where 245 identifies section width in millimeters, 65 is the aspect ratio, R indicates radial construction, and 17 is the wheel diameter in inches. On the 2004 Buick Trucks Rainier, this size is used on certain 4x2 configurations, so it should not be assumed across every sub-model. The available product selection in this size includes a BFGoodrich All Terrain T/A KO2 with raised white letter sidewalls, giving it a more truck-oriented visual character. This size is worth considering when it matches the vehicle's original wheel setup and intended use.
Fit(s): CXL 4x2, CXL 4x4, CXL Plus 4x2, and CXL Plus 4x4
Construction: Radial|Rim: 17 in
255/60R17 is a metric radial size with a 255-millimeter nominal section width, a 60-series aspect ratio, radial construction, and a 17-inch rim diameter. On the 2004 Buick Trucks Rainier, this size appears across both 4x2 and 4x4 CXL and CXL Plus applications, making it the more broadly used fitment within the lineup. Its sizing gives the buyer a distinctly modern format that should be matched carefully to the actual wheel and sub-model. This is the size to evaluate when confirming a Rainier equipped with the wider 17-inch tire setup.
Tire fitment on the 2004 Buick Trucks Rainier is not completely uniform across the covered sub-models. Some versions use one size exclusively, while certain 4x2 trims can use either of the two 17-inch radial sizes, so confirming the exact sub-model matters before comparing tires.
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2004 Buick Trucks Rainier CXL 4x2
The 2004 Buick Trucks Rainier CXL 4x2 can use either 245/65R17 or 255/60R17, both in radial construction. That makes wheel verification especially important, since the tire choice should match the actual 17-inch setup on the vehicle rather than relying on trim name alone.
The 2004 Buick Trucks Rainier CXL 4x4 uses 255/60R17 radial tires. For this sub-model, the selection process is more straightforward and centers on choosing a tire in the correct size that matches the vehicle's current wheel setup and intended road use.
The 2004 Buick Trucks Rainier CXL Plus 4x2 can be fitted with either 245/65R17 or 255/60R17 radial tires. Buyers should confirm which wheel and tire package is currently on the SUV before choosing between available products, especially if the vehicle has seen wheel changes over time.
The 2004 Buick Trucks Rainier CXL Plus 4x4 uses 255/60R17 radial tires. With one primary fitment to focus on, the main decision becomes selecting the right tire type and appearance for the way the vehicle is used today.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2004 Buick Trucks Rainier Tires for Sale
Current product choice centers on 245/65R17, with a BFGoodrich All Terrain T/A KO2 available in radial construction. It adds an all-terrain tire series and raised white letter sidewall treatment, along with a 7.0- to 8.0-inch rim-width specification to compare against the vehicle's wheel.
Owners of a 2004 Buick Trucks Rainier usually need clarity on the correct tire size, which sub-model uses which fitment, and how to compare available radial tires for wheel compatibility, appearance, and everyday road use.
Tire Size & Fitment
What tire size fits a 2004 Buick Trucks Rainier?
The 2004 Buick Trucks Rainier uses two primary tire sizes: 245/65R17 and 255/60R17. Both are radial tires for 17-inch wheels, but they do not apply the same way across every sub-model. Certain CXL and CXL Plus 4x2 versions can use either size, while the CXL 4x4 and CXL Plus 4x4 use 255/60R17.
That makes sub-model and wheel confirmation the first step before comparing tire options. A Rainier that has changed hands over the years may also have replacement wheels or a different tire package than expected, so checking the current tire sidewall and wheel size helps avoid ordering the wrong fitment.
What size rim does a 2004 Buick Trucks Rainier use?
The covered tire fitments for the 2004 Buick Trucks Rainier use a 17-inch rim diameter. Both 245/65R17 and 255/60R17 are built around that same 17-inch wheel size, so the difference between them is in tire width and profile rather than wheel diameter.
Rim diameter is only one part of the fitment picture, though. Wheel width also matters, especially when comparing a specific tire to the wheel on the vehicle, and any aftermarket wheel change can alter what tire size makes sense for the SUV's present setup.
Why does the 2004 Buick Trucks Rainier have more than one tire size?
The 2004 Buick Trucks Rainier has more than one tire size because fitment varies by sub-model and wheel package. The lineup includes both 245/65R17 and 255/60R17, with some 4x2 versions using either size while the 4x4 versions covered here use 255/60R17.
That variation means the correct tire cannot be chosen by model name alone. Trim, drive configuration, and the wheels actually installed on the vehicle should all be checked, particularly on an SUV of this age where replacements, upgrades, or previous owner changes may have altered the original setup.
Choosing the Right Tire
What should I consider when choosing a 245/65R17 tire for a 2004 Buick Trucks Rainier?
Start by confirming that 245/65R17 is the size your 2004 Buick Trucks Rainier actually uses, since some versions use 255/60R17 instead. Once size is confirmed, compare construction, rim-width compatibility, load capacity, sidewall style, and the kind of use the vehicle sees, whether that is regular road driving or a more truck-oriented role.
The available 245/65R17 product is a BFGoodrich All Terrain T/A KO2 with radial construction, raised white letter sidewalls, a 7.0- to 8.0-inch rim-width range, and a 2,405-pound load capacity at 65 psi. That makes wheel compatibility and intended appearance just as important as matching the size code.
What sidewall styles are available for 2004 Buick Trucks Rainier tires?
Among the currently available products for the covered Rainier fitments, the visible sidewall style is RWL, or raised white letter. That treatment gives the tire a more assertive, truck-oriented appearance than a plain blackwall and can change the overall presentation of a 2004 Buick Trucks Rainier quite noticeably.
Sidewall style does not replace the need to match the correct size, wheel, and tire specifications. Once those basics are right, the sidewall becomes part of the visual decision, especially for owners who want the SUV to lean more toward a clean stock look or a more rugged all-terrain personality.
What brands offer tires for the 2004 Buick Trucks Rainier?
The available product selection for the covered 2004 Buick Trucks Rainier fitments includes BFGoodrich. In 245/65R17, the listed option is the BFGoodrich All Terrain T/A KO2, which combines radial construction with an all-terrain tire series and a raised white letter sidewall treatment.
Brand is only one part of the decision, especially on a Rainier where more than one primary size may apply depending on sub-model. It still helps to compare the tire's size, wheel-width range, load specification, and visual style so the finished choice matches both the vehicle setup and the way it is used.
Restoration & Appearance
Which tire should I choose for a period-style 2004 Buick Trucks Rainier?
A period-style 2004 Buick Trucks Rainier should start with the correct primary size for the exact sub-model and wheel package, either 245/65R17 or 255/60R17. Because this is a modern SUV-era application, the right visual approach usually comes from staying within the proper size and choosing a tire whose overall character suits the vehicle's intended presentation.
Owners leaning toward a more assertive truck look may appreciate an all-terrain series and raised white letter sidewall, while others may prefer a subtler road-going appearance in the correct fitment. When exact historical appearance matters, trim-level brochures and marque-specific reference material can help narrow the look you want.
Does correct tire fitment matter for a 2004 Buick Trucks Rainier restoration?
Correct tire fitment matters on a 2004 Buick Trucks Rainier restoration because the wrong size can affect the SUV's stance, wheelwell appearance, and overall character just as much as it affects practical fitment. With both 245/65R17 and 255/60R17 used within the model range, size accuracy is an important part of getting the vehicle to look right.
The first step is matching the restoration to the actual sub-model and wheel setup rather than choosing by appearance alone. After that, details such as sidewall treatment and tire series can help shape the final presentation without drifting away from the dimensions that belong on the vehicle.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2004 Buick Trucks Rainier?
Yes, modifications can affect tire fitment on a 2004 Buick Trucks Rainier even when the tire size itself looks close to stock. Aftermarket wheels, changes in wheel width, altered offset, suspension work, or ride-height changes can all influence how a 245/65R17 or 255/60R17 tire sits and clears the vehicle.
That is especially important on a model that already has more than one legitimate factory-era size within the lineup. A modified Rainier should be checked for wheel dimensions, steering clearance, and fender or suspension contact before settling on a replacement tire, rather than assuming the original fitment logic still applies.
What should I inspect before driving a 2004 Buick Trucks Rainier on new tires?
Before driving a 2004 Buick Trucks Rainier on new tires, inspect the wheels for the correct 17-inch diameter and suitable width, confirm that all four tires match the intended size, and check inflation pressure carefully. It also helps to look over the suspension and steering components so the new tires are not being asked to compensate for worn hardware.
A short clearance check is worthwhile before regular use, especially near the inner fender, suspension components, and steering lock positions. After the first few drives, recheck pressure and look for any sign of rubbing, uneven wear, or unusual handling that might point to an issue with fitment or alignment.
How often should tires on a 2004 Buick Trucks Rainier be inspected?
Tires on a 2004 Buick Trucks Rainier should be inspected regularly, not just when tread wear becomes obvious. A visual check for cracking, cuts, bulges, embedded objects, and uneven wear is a smart routine on any older SUV, particularly one that may sit for stretches and then return to road use.
Pressure should be checked consistently as well, since underinflation or air loss can change how the Rainier rides and wears its tires. It also helps to inspect before longer trips, because age, storage conditions, and infrequent use can matter just as much as mileage on a vehicle from this era.
