The 1989 Porsche 911 sits at an interesting point in the air-cooled 911 story, blending classic rear-engine character with late-1980s performance, wider rubber, and more specialized fitment depending on model and axle position. For many owners, tire selection is less about finding a generic 911 size and more about confirming whether the car uses the 16-inch or 17-inch front-and-rear combination tied to Carrera, Carrera 4, Speedster, or Turbo Carrera setup. Every primary fitment here is radial, with distinct front and rear sizing. Available choices range from blackwall performance-oriented tires to wide whitewall options in select front sizes, so appearance, wheel setup, and intended road use all matter.
Which Tire Size Is Right for The 1989 Porsche 911
The 1989 Porsche 911 uses five primary tire sizes, and the correct combination depends first on the exact sub-model and whether you are selecting a front or rear tire. This is also a two-wheel-diameter fitment, with both 16-inch and 17-inch applications, so confirming the car's actual wheel diameter before choosing a tire is essential. Once that is settled, the decision becomes a matter of matching the correct axle position, size format, and product style to the car's setup.
Fit(s): Carrera 4 Front, Carrera Front, and Speedster Front
Construction: Radial|Rim: 17 in
205/50R17 is a metric radial size that reads as 205 millimeters of section width, a 50-series aspect ratio, and radial construction for a 17-inch wheel. On the 1989 Porsche 911, this size serves as a front fitment on certain configurations that use the later 17-inch wheel setup. Available choices include blackwall performance-oriented tires from BFGoodrich and Vredestein, along with an American Classic Radial wide whitewall option for a more distinctive appearance. This size should be evaluated as a front application only where the vehicle's sub-model and wheel diameter call for it.
Fit(s): Carrera 4 Front, Carrera Front, and Turbo Carrera Front
Construction: Radial|Rim: 16 in
205/55R16 is a metric radial size with a 205-millimeter section width, 55-series profile, and fitment for a 16-inch rim. On the 1989 Porsche 911, it appears as a front tire size on 16-inch wheel applications, making it part of the correct front-to-rear stagger on several sub-models rather than a universal fitment. Product selection includes blackwall tires from BFGoodrich and Michelin, plus a wide whitewall American Classic Radial for buyers who want a less modern visual presentation. The key here is confirming that the car actually uses the 16-inch front setup before comparing brands or series.
225/50R16 uses the same modern metric radial naming convention, with a 225-millimeter section width, 50-series profile, and a 16-inch rim diameter. For the 1989 Porsche 911, this size is used as a rear fitment on certain 16-inch-wheel Carrera and Carrera 4 applications, so its role is tied to axle position as much as model identification. Available blackwall choices include BFGoodrich g-Force series options and a Michelin Pilot Sport. This size makes sense only when the car's rear wheel diameter and sub-model call for the 16-inch staggered arrangement.
Fit(s): Carrera 4 Rear, Carrera Rear, and Speedster Rear
Construction: Radial|Rim: 17 in
255/40R17 is a wider metric radial size, combining a 255-millimeter section width, 40-series profile, and a 17-inch rim diameter. On the 1989 Porsche 911, it serves as a rear fitment for 17-inch applications, including staggered setups that pair it with a narrower front tire. The available choices are performance-focused blackwall tires from BFGoodrich, Nitto, and Vredestein, with rim-width compatibility centered on wider rear wheels. This is a size to choose only after confirming that the car is using the correct 17-inch rear wheel package for its particular configuration.
245/45R16 is a metric radial size that denotes a 245-millimeter section width, a 45-series profile, and fitment to a 16-inch wheel. On the 1989 Porsche 911, this is the rear tire size associated with the Turbo Carrera's 16-inch setup, giving it a more specific role than the other rear sizes used across the model range. Tire choice in this fitment is less about sidewall variety and more about matching the exact rear specification to the correct wheel and axle position. Buyers should verify both the sub-model and the rear wheel diameter before treating this as the right size.
Sub-model fitment on the 1989 Porsche 911 is not one-size-fits-all, because front and rear tire sizes vary by configuration and by 16-inch versus 17-inch wheel setup. Checking the exact sub-model and axle position is the most important step before comparing tires.
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1989 Porsche 911 Carrera 4 Front
The 1989 Porsche 911 Carrera 4 Front uses either a 205/50R17 or 205/55R16 radial, depending on which wheel package is on the car. Tire selection starts with confirming whether the front wheels are 17-inch or 16-inch, then choosing among the available blackwall or appearance-oriented options in that exact size.
The 1989 Porsche 911 Carrera 4 Rear uses either a 225/50R16 or 255/40R17 radial, tied to the rear wheel diameter and staggered setup. That makes rear-wheel confirmation essential before purchase, especially since the two sizes differ noticeably in width, profile, and the product choices available.
The 1989 Porsche 911 Carrera Front follows the same front fitment pattern, using either 205/50R17 or 205/55R16 radial tires. The practical choice is not between two interchangeable sizes, but between the correct size for the wheel diameter already on the car and the product style that suits its use.
The 1989 Porsche 911 Carrera Rear uses either 225/50R16 or 255/40R17, again depending on the rear wheel package. Rear tire selection should stay tied to the existing wheel diameter and stagger, then narrow down to the available performance-oriented tire lines within that exact fitment.
The 1989 Porsche 911 Speedster Front uses 205/50R17 radial tires. That makes front selection straightforward, with the main decision shifting to brand, tread character, and whether a blackwall performance look or a more unusual wide whitewall presentation better suits the car.
The 1989 Porsche 911 Speedster Rear uses 255/40R17 radial tires. Because this is a dedicated rear fitment on a 17-inch wheel, the focus should be on matching the correct rear size and wheel width rather than trying to substitute another 17-inch size without checking clearance.
The 1989 Porsche 911 Turbo Carrera Front uses 205/55R16 radial tires. Front tire choice is therefore centered on selecting the right 16-inch fitment and comparing the available series and sidewall treatments within that established size.
The 1989 Porsche 911 Turbo Carrera Rear uses 245/45R16 radial tires. That specific rear fitment makes wheel-diameter confirmation especially important, since the Turbo Carrera does not share the same rear size pattern as every other 1989 Porsche 911 configuration.
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 Porsche 911 Tires for Sale
Available 1989 Porsche 911 tire choices span 16-inch and 17-inch radial fitments from BFGoodrich, Michelin, Nitto, Vredestein, and American Classic. Most options are blackwall performance-oriented tires, while select 205 front sizes also offer wide whitewall alternatives for a more distinctive appearance.
Owners researching 1989 Porsche 911 tires usually need to sort out front-versus-rear sizing, 16-inch versus 17-inch wheels, and the differences between available brands, series, and sidewall treatments. The questions below focus on fitment, selection, appearance, and road-use checks for this exact model year.
Tire Size & Fitment
What tire size fits a 1989 Porsche 911?
A 1989 Porsche 911 does not use just one tire size across the entire model range. The primary fitments are 205/50R17, 205/55R16, 225/50R16, 255/40R17, and 245/45R16, all in radial construction, with the exact size depending on sub-model and whether the tire is for the front or rear axle.
The practical first step is identifying the exact version of the car and confirming whether it uses 16-inch or 17-inch wheels. Carrera and Carrera 4 fitments can use different front and rear combinations, the Speedster uses a 17-inch front and rear pairing, and the Turbo Carrera uses its own 16-inch rear size.
What size rim does a 1989 Porsche 911 use?
The 1989 Porsche 911 uses both 16-inch and 17-inch rim diameters, depending on the specific sub-model and axle position. Front fitments appear in both diameters, and rear fitments do as well, so the correct wheel diameter has to be confirmed before selecting a tire size.
That matters because a 16-inch tire and a 17-inch tire are not interchangeable even if the overall proportions look similar. Checking the stamp on the wheel, the existing tire size, and the car's front-and-rear setup will keep the search focused on the correct fitment and avoid mixing sizes from different wheel packages.
Why does the 1989 Porsche 911 have more than one tire size?
The 1989 Porsche 911 has more than one tire size because fitment changes by sub-model and by front versus rear application. Carrera, Carrera 4, Speedster, and Turbo Carrera configurations do not all use the same wheel diameter or the same rear-tire dimensions, and several of them use staggered sizing.
That means the right choice is not simply the largest or widest size shown for the model year. Tire selection should follow the car's actual configuration first, then the wheel diameter, then the axle position. Once those are confirmed, it becomes much easier to compare tire series, sidewall style, and brand within the proper size.
Choosing the Right Tire
What should I consider when choosing a 1989 Porsche 911 tire?
Start with the exact size required for the car's sub-model, wheel diameter, and axle position, because the 1989 Porsche 911 uses several different front and rear combinations. Every primary fitment here is radial, so the main decision is matching the correct size first and then comparing available tire lines within that fitment.
After size is settled, look at rim-width compatibility, brand, tread type, sidewall appearance, and any meaningful differences in load capacity or intended use. A Speedster rear tire decision is different from a Turbo Carrera rear decision, and a front 205 size with whitewall availability serves a different goal than a blackwall performance tire.
What sidewall styles are available for 1989 Porsche 911 tires?
Most 1989 Porsche 911 tire options in these fitments are blackwall radials, especially in the rear sizes and the performance-oriented front sizes. Wide whitewall choices are also available in select front fitments, including 205/50R17 and 205/55R16, through the American Classic Radial line.
That gives the car owner two very different visual directions. Blackwall tires keep a more contemporary late-1980s performance look, while a wide whitewall changes the presentation substantially and may appeal more to a custom or highly individualized build. The right choice depends on the car's appearance goals as much as its wheel size.
What brands offer tires for the 1989 Porsche 911?
Tires for the 1989 Porsche 911 are available from BFGoodrich, Michelin, Nitto, Vredestein, and American Classic across the covered fitments. Brand availability varies by size, so some combinations offer several choices while others are narrower and more tied to the exact front or rear application.
The useful comparison is not just brand name, but what each brand offers in the needed size. Some sizes emphasize blackwall performance series, while certain front fitments also include a wide whitewall option. Once the correct tire size is confirmed, brand choice becomes part of the larger decision about appearance, road use, and wheel compatibility.
Restoration & Appearance
Which tire should I choose for a period-style 1989 Porsche 911?
A period-style 1989 Porsche 911 tire choice starts with the correct front or rear size for the exact sub-model, since this model year uses several staggered combinations. After the fitment is confirmed, the appearance decision usually comes down to a more traditional blackwall presentation or, in select front sizes, a wide whitewall alternative.
For most late-1980s 911s, blackwall radials align more naturally with the car's original-era performance character. Buyers pursuing exact restoration standards should verify sidewall appearance and brand preferences through marque references, period photos, or model-specific documentation, since the right size alone does not settle every originality question.
How does tire construction affect the appearance of a restored 1989 Porsche 911?
On a 1989 Porsche 911, construction is straightforward because the primary fitments are radial. The visible appearance difference comes less from choosing bias-ply versus radial and more from selecting the correct low-profile size, the proper front-and-rear stagger, and the sidewall style that matches the car's intended presentation.
A restored car can look noticeably different if the rear width, wheel diameter, or sidewall treatment strays from its proper setup. Keeping the correct 16-inch or 17-inch arrangement and the right front-to-rear relationship usually matters more visually than chasing a generic tire that happens to fit the rim diameter.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1989 Porsche 911?
Yes, modifications can affect tire fitment on a 1989 Porsche 911, especially because the car already uses staggered front and rear sizing and more than one wheel diameter. Aftermarket wheels, altered offsets, suspension changes, lowered ride height, or body modifications can all change the clearance available for the correct nominal tire size.
That is why the existing wheel and chassis setup should be checked before assuming a stock size will behave the same on a modified car. Steering clearance up front, fender space at the rear, and actual wheel width are all worth verifying, particularly when the car has wider rear tires such as 255/40R17 or 245/45R16.
What should I inspect before driving a 1989 Porsche 911 on new tires?
Before driving a 1989 Porsche 911 on new tires, inspect the wheels for correct diameter and condition, confirm that the front and rear sizes match the car's setup, and check inflation, valve stems, and lug torque. It is also smart to look closely at suspension and alignment condition on a car that may have seen age or intermittent use.
A short initial drive should be used to confirm there is no rubbing at full steering lock, over bumps, or under load. Air-cooled 911s are especially sensitive to tire setup balance, so even when the sizes are correct, attention to wheel condition, alignment, and clearance helps the car feel composed and predictable on the road.
How should tires on a collector 1989 Porsche 911 be maintained?
Tires on a collector 1989 Porsche 911 should be maintained with regular pressure checks, periodic visual inspection, and attention to age as well as tread depth. Even a low-mileage car can develop sidewall cracking, flat spotting, or air loss if it sits for extended periods or is stored in poor conditions.
Routine maintenance also means checking for uneven wear that could point to alignment or suspension issues, and keeping the car away from prolonged sunlight, heat, moisture, and ozone sources during storage. A 911 that is driven occasionally should still have its tires inspected before longer outings, particularly if it has staggered fitment and older wheels.
