The 1989 Pontiac Grand Prix sits at an interesting point in Pontiac’s late-1980s performance and personal-coupe story, spanning everyday LE and Base models through the sharper SE and the far more specialized Turbocharger version. Tire fitment matters here because this one model year uses four distinct radial sizes across 14-, 15-, and 16-inch wheel packages. That means the real choice starts with identifying the exact sub-model and wheel diameter, then narrowing the field by sidewall style, tire series, and overall presentation. Whether the goal is a clean stock-style look or the right stance and road manners for a specific trim, getting the size right comes first.
Which Tire Size Is Right for The 1989 Pontiac Grand Prix
The 1989 Pontiac Grand Prix uses four primary tire sizes, and the correct one depends on the exact sub-model and wheel diameter. All of these fitments are radial, but they span 14-, 15-, and 16-inch rims, so the first step is confirming whether the car is a Base, LE, LE Coupe w/Rally Suspension, SE, or Turbocharger model and checking the wheel size currently on the car.
195/70R15 is a metric radial size: 195 is the nominal section width in millimeters, 70 is the aspect ratio, R identifies radial construction, and 15 is the rim diameter in inches. On the 1989 Pontiac Grand Prix, this size is used on 15-inch applications and appears across several sub-model configurations. Product choice in this size is more specialized, with a Michelin XWX blackwall option that suits buyers looking for a traditional high-performance European-style radial presentation. It is the size to evaluate when the car already carries the correct 15-inch wheel setup.
195/75R14 is a metric radial size in which 195 denotes nominal width in millimeters, 75 is the aspect ratio, R means radial construction, and 14 identifies the wheel diameter. This fitment is associated with 14-inch wheel applications on certain 1989 Pontiac Grand Prix Base and LE models. The available choices show the widest appearance variety, including blackwall-related classic radial lines as well as narrow and wide whitewall styles from Coker Classic, Tornel, Maxxis, and Travelstar. It deserves close attention when maintaining a more comfort-oriented or restoration-minded 14-inch setup.
215/60R16 is a metric radial size where 215 is the nominal section width in millimeters, 60 is the aspect ratio, R indicates radial construction, and 16 is the rim diameter in inches. On the 1989 Pontiac Grand Prix, this size is tied to a 16-inch application rather than the smaller-wheel Base and LE fitments. Its lower profile relative to the 14- and 15-inch sizes gives it a distinct role within the model range. This is the size to verify carefully when dealing with an SE, especially if the car has had wheel changes over time.
245/50R16 is a metric radial size: 245 represents nominal section width in millimeters, 50 is the aspect ratio, R marks radial construction, and 16 is the wheel diameter. This is the widest primary fitment used on the 1989 Pontiac Grand Prix and is associated with the Turbocharger model’s 16-inch setup. Available products in this size come from BFGoodrich in the g-Force Comp 2 AS and g-Force Sport Comp 2 series, both in blackwall form. It is the size to focus on when preserving the wider, more performance-oriented tire footprint used on that configuration.
Sub-model fitment on the 1989 Pontiac Grand Prix is not one-size-fits-all. Some versions share more than one possible tire size, while the SE and Turbocharger move into distinct 16-inch fitments, so confirming the exact trim and wheel diameter is essential before choosing tires.
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1989 Pontiac Grand Prix Base
The 1989 Pontiac Grand Prix Base uses either a 195/70R15 or 195/75R14 radial, depending on its wheel package. That makes wheel confirmation especially important, and the final tire choice may also come down to whether the car is being kept in a plain blackwall look or a more traditional whitewall presentation.
The 1989 Pontiac Grand Prix LE also spans 195/70R15 and 195/75R14 radial fitments rather than one universal size. Tire selection starts with the actual wheel diameter on the car, then shifts to appearance and series choice, especially in 14-inch form where several whitewall options are available.
1989 Pontiac Grand Prix LE Coupe w/Rally Suspension
The 1989 Pontiac Grand Prix LE Coupe w/Rally Suspension uses the 195/70R15 radial fitment. That narrows the decision to choosing the right 15-inch tire presentation and verifying that the car still carries its correct wheel setup rather than a later wheel swap.
The 1989 Pontiac Grand Prix SE uses a 215/60R16 radial on a 16-inch wheel. This setup should be matched by confirming the current wheel diameter first, since a change to smaller wheels over the years would move the car out of its original primary fitment path.
The 1989 Pontiac Grand Prix Turbocharger uses the wide 245/50R16 radial fitment. Tire selection here centers on maintaining the proper 16-inch performance-oriented setup and comparing the available BFGoodrich series within that size rather than sorting through multiple primary sizes.
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 1989 Pontiac Grand Prix Tires for Sale
Available 1989 Pontiac Grand Prix tire choices vary significantly by size, from Michelin blackwall 15-inch fitment to multiple 14-inch whitewall radials from Coker Classic, Tornel, Maxxis, and Travelstar, plus BFGoodrich g-Force blackwall options in 245/50R16 for the Turbocharger application.
These FAQs focus on the exact tire sizes used on the 1989 Pontiac Grand Prix, how sub-model and wheel choices affect fitment, and what to compare when selecting between available radial tires for appearance, maintenance, and road use.
Tire Size & Fitment
What tire size fits a 1989 Pontiac Grand Prix?
The 1989 Pontiac Grand Prix does not use one universal tire size. Depending on sub-model and wheel package, the primary sizes are 195/75R14, 195/70R15, 215/60R16, and 245/50R16, and all are radial fitments. Base and LE models can use either 14- or 15-inch sizes, the LE Coupe w/Rally Suspension uses 195/70R15, the SE uses 215/60R16, and the Turbocharger uses 245/50R16.
The practical first step is matching the tire size to the actual wheel diameter on the car now, not just the badge on the fender. Many older Grand Prix cars have seen wheel changes over time, so identifying the exact sub-model and measuring the wheel before ordering helps avoid choosing the wrong diameter or profile.
What size rim does a 1989 Pontiac Grand Prix use?
A 1989 Pontiac Grand Prix can use 14-inch, 15-inch, or 16-inch rims, depending on the exact sub-model and tire size. The 195/75R14 fitment uses a 14-inch rim, 195/70R15 uses a 15-inch rim, and both 215/60R16 and 245/50R16 use a 16-inch rim. Rim diameter is one of the biggest dividing lines across this model year.
Checking rim diameter should come before comparing brands or sidewall styles. Even within the same model year, the Grand Prix spans multiple wheel packages, and the wrong rim diameter immediately rules out a tire choice. Looking at the tire sidewall and measuring the wheel can quickly confirm whether the car remains on its expected setup.
Why does the 1989 Pontiac Grand Prix have more than one tire size?
The 1989 Pontiac Grand Prix covers several sub-models with different wheel and tire packages, which is why more than one primary size appears. Base and LE versions can use either 195/75R14 or 195/70R15, while the SE moves to 215/60R16 and the Turbocharger uses 245/50R16. Those differences reflect distinct trim and wheel configurations rather than one interchangeable fitment.
That variation means tire selection should start with the specific version of the car, followed by the wheel diameter currently installed. It also affects the kind of choices available once the size is confirmed, since 14-inch applications lean toward classic whitewall options, while the wider 16-inch Turbocharger fitment focuses more on blackwall performance-style tires.
Choosing the Right Tire
What should I consider when choosing a 1989 Pontiac Grand Prix tire?
Start with the correct primary size for the exact sub-model and wheel diameter, because the 1989 Pontiac Grand Prix spans four different radial fitments. After that, compare the tire’s construction details, sidewall treatment, rim-width specification where stated, and overall character. The right choice can look very different on a 14-inch Base or LE setup than it does on a 16-inch SE or Turbocharger car.
Appearance and use matter once fitment is narrowed down. A whitewall tire can change the presentation of a 14-inch Grand Prix dramatically, while the 245/50R16 Turbocharger setup is more about matching the correct width and wheel compatibility. It also helps to check load figures and weight when those details are available, especially on a car used regularly.
What sidewall styles are available for 1989 Pontiac Grand Prix tires?
Sidewall style depends on the tire size. In 195/75R14, the 1989 Pontiac Grand Prix has the broadest variety, including wide whitewall and narrow whitewall options. The available 195/70R15 and 245/50R16 offerings shown here are blackwall tires, giving those applications a cleaner and more performance-oriented appearance than the more traditional 14-inch whitewall choices.
That makes sidewall style an important visual decision once the correct size is confirmed. A whitewall can complement a more formal late-1980s coupe presentation, while blackwall choices keep the look more restrained or sport-focused. The key is choosing the sidewall after size and wheel diameter are settled, rather than using appearance alone to guide fitment.
What brands offer tires for the 1989 Pontiac Grand Prix?
Available brands for the 1989 Pontiac Grand Prix include Michelin, Coker Classic, Tornel, Maxxis, Travelstar, and BFGoodrich, depending on the tire size. The 15-inch fitment is represented by Michelin, the 14-inch size includes several classic-style radial choices from multiple brands, and the 245/50R16 Turbocharger fitment is represented by BFGoodrich performance-oriented series.
Brand comparison only matters after the correct size is established, since not every brand appears in every Grand Prix fitment. Once size is confirmed, the meaningful differences are usually sidewall styling, series character, and wheel compatibility rather than the brand name alone. That is especially true when comparing whitewall-oriented 14-inch tires against blackwall 15- and 16-inch options.
Restoration & Appearance
Which tire should I choose for a period-style 1989 Pontiac Grand Prix?
A period-style choice starts with the correct primary size for the exact 1989 Pontiac Grand Prix sub-model and wheel diameter. After that, the visual direction becomes clearer. The 195/75R14 fitment offers narrow and wide whitewall radials that suit a more traditional late-1980s personal-coupe presentation, while the 195/70R15 and 16-inch fitments lean toward blackwall styling.
For a restoration-minded car, the goal is usually to match the tire’s overall look to the way the car is being finished rather than chasing one universal answer. Exact originality questions should be checked against vehicle-specific historical references or marque expertise, but correct size, proper wheel diameter, and a sidewall style that fits the car’s character are the right starting points.
Does correct tire fitment matter for a 1989 Pontiac Grand Prix restoration?
Correct tire fitment matters because the 1989 Pontiac Grand Prix used different radial sizes across different sub-models and wheel packages. A restoration that uses the wrong rim diameter or profile can change the car’s stance and visual balance, even before road behavior is considered. Getting back to the right size family is one of the simplest ways to keep the car’s presentation coherent.
Appearance is only part of the equation. The correct size also helps keep wheel compatibility and body clearance in the range intended for that configuration. Even on a driver-quality restoration, confirming whether the car should be on a 14-, 15-, or 16-inch setup prevents a lot of confusion when comparing whitewall, blackwall, and series choices.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1989 Pontiac Grand Prix?
Yes, modifications can affect tire fitment on a 1989 Pontiac Grand Prix, especially because this model already spans several wheel diameters and profiles. Aftermarket wheels, altered suspension height, replacement springs, or body changes can all influence whether the original size still makes sense. That is particularly important on the 16-inch SE and Turbocharger applications, where width and profile are more specialized.
A Grand Prix that has been changed from its original setup should be checked for wheel diameter, wheel width, and clearance at the fender and steering range before choosing tires. Even when the sidewall size looks close, the actual wheel package may no longer match the stock fitment path, so measuring the car is more useful than relying on assumptions.
What should I inspect before driving a 1989 Pontiac Grand Prix on new tires?
Before driving a 1989 Pontiac Grand Prix on new tires, inspect the wheels for the correct diameter and condition, confirm the tires are mounted in the proper size, and check inflation carefully. It is also smart to look over suspension and steering components, since worn parts can affect how a newly installed tire behaves even when the tire itself is correct.
A short, cautious road check helps confirm there is no rubbing, vibration, or unexpected pull after installation. Collector-era cars that sit for long periods deserve extra attention to wheel hardware, valve stems, and any signs of air loss. Taking a few minutes to verify those basics makes the first drive on new tires much more predictable.
How should tires on a collector 1989 Pontiac Grand Prix be maintained?
Tires on a collector 1989 Pontiac Grand Prix should be maintained with regular pressure checks, visual inspections, and careful storage habits. Look for sidewall cracking, cuts, bulges, uneven tread wear, and gradual air loss, especially if the car is driven only occasionally. A low-mile car can still have tire aging issues even when the tread appears to be in good condition.
Storage conditions matter as much as mileage on an older collector vehicle. Keeping the Grand Prix away from prolonged heat, direct sunlight, moisture, and ozone sources can help preserve tire condition between drives. It also helps to inspect the tires before longer trips rather than assuming they are ready simply because the car has not been used much.
