The 1981 Porsche 911 sits in the air-cooled era that made the model such a lasting benchmark for driver involvement, compact dimensions, and rear-engine character. On this car, tire choice is closely tied to the wheel package because fitment uses staggered front and rear radial sizes across both 15-inch and 16-inch setups. Front tires are either 185/70R15 or 205/55R16, while rear fitment moves to 215/60R15 or 225/50R16. That creates meaningful choices in brand, tread series, and sidewall presentation, from traditional blackwall sport radials to whitewall or redline alternatives in selected sizes. The right selection starts with confirming the actual wheel diameter and preserving the balance between front and rear fitment.
Which Tire Size Is Right for The 1981 Porsche 911
The 1981 Porsche 911 uses four primary tire sizes, with fitment split between front and rear positions and between 15-inch and 16-inch wheel packages. The first step is confirming the wheel diameter on the car and whether it is using the 15-inch front-and-rear combination or the 16-inch front-and-rear combination, since that determines the correct front and rear sizes together.
185/70R15 is a metric radial size in which 185 identifies nominal section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 15 is the wheel diameter in inches. On the 1981 Porsche 911, this size serves the front position in the 15-inch setup and keeps the car in an all-radial fitment. Available choices include blackwall sport and touring-oriented options from Michelin, Dunlop, and Avon, along with a wide whitewall offering from BFGoodrich. This size matters when the car retains 15-inch front wheels and you want to match the front fitment to the proper rear tire pairing.
205/55R16 is a metric radial size with a 205-millimeter nominal section width, a 55-series profile, radial construction, and a 16-inch rim diameter. On the 1981 Porsche 911, it is the front tire size for the 16-inch setup, making it a front-specific choice rather than a universal size for every wheel package. Product options are largely blackwall performance radials from BFGoodrich and Michelin, with a wide whitewall alternative also available from American Classic. This size becomes the right path when the car is equipped with 16-inch front wheels and the rear is matched to the corresponding 16-inch rear fitment.
215/60R15 is a metric radial size that uses a 215-millimeter nominal section width, a 60-series profile, and a 15-inch wheel diameter. For the 1981 Porsche 911, this size belongs at the rear in the 15-inch combination, so it should be viewed as part of a matched front-and-rear setup rather than a standalone substitution. The available selection is broad, including blackwall, raised white letter, wide whitewall, and redline sidewall treatments across series from American Classic, BFGoodrich, Dunlop, Avon, and Vredestein. It is the size to evaluate when the car runs 15-inch rear wheels and the goal is to balance appearance, period style, and road use.
225/50R16 is a metric radial size with a 225-millimeter nominal section width, a 50-series aspect ratio, radial construction, and a 16-inch rim diameter. On the 1981 Porsche 911, this is the rear size for the 16-inch wheel package, so it works as the rear partner to the corresponding 16-inch front fitment. Available choices focus on blackwall performance radials from BFGoodrich and Michelin, with differences in tire series and rim-width compatibility worth comparing. This size is the correct rear starting point when the car is already set up with 16-inch wheels and a staggered front-to-rear arrangement.
Fitment on the 1981 Porsche 911 is straightforward once the axle position and wheel diameter are confirmed, because the covered SC front and rear positions use different sizes. Checking both matters because the car uses a staggered setup, with one pair of sizes for 15-inch wheels and another for 16-inch wheels.
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1981 Porsche 911 SC Front
The 1981 Porsche 911 SC Front uses radial front fitments in either 185/70R15 or 205/55R16, depending on the wheel package on the car. Tire selection here starts with confirming whether the front wheels are 15-inch or 16-inch, then choosing among blackwall or selected whitewall options in the matching size.
The 1981 Porsche 911 SC Rear uses radial rear fitments in either 215/60R15 or 225/50R16, again tied to the wheel package in use. Rear tire choice should stay paired with the correct front size, while leaving room to compare sidewall treatments, tire series, and rim-width specifications within the proper rear fitment.
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 1981 Porsche 911 Tires for Sale
Available 1981 Porsche 911 tire choices span Michelin, Dunlop, Avon, BFGoodrich, Vredestein, and American Classic, with differences by size in tire series, sidewall style, and rim-width compatibility. Blackwall options dominate, while selected 15-inch and 16-inch sizes also add whitewall, redline, or raised white letter alternatives.
Owners of a 1981 Porsche 911 usually need to sort out front versus rear sizing, 15-inch versus 16-inch wheels, and the differences between available radial tire styles. These answers focus on fitment, rim compatibility, product selection, appearance, and pre-drive checks for an air-cooled 911.
Tire Size & Fitment
What tire size fits a 1981 Porsche 911?
The 1981 Porsche 911 uses a staggered radial setup rather than one universal tire size. Front fitment is either 185/70R15 or 205/55R16, and rear fitment is either 215/60R15 or 225/50R16, depending on whether the car is using the 15-inch or 16-inch wheel package.
The key is to confirm both axle position and wheel diameter before choosing tires. A front size should be matched with its corresponding rear size, and a 15-inch setup should stay paired with 15-inch front and rear tires unless the car has been intentionally changed to a different wheel package.
What size rim does a 1981 Porsche 911 use?
A 1981 Porsche 911 uses either 15-inch or 16-inch rims, depending on the tire setup on the car. The 15-inch combination uses 185/70R15 front and 215/60R15 rear, while the 16-inch combination uses 205/55R16 front and 225/50R16 rear.
Reading the tire sidewall is a quick way to confirm rim diameter, but it is also worth checking the wheels themselves if the car has seen changes over the years. The correct choice depends on the actual wheel package currently installed, not simply on model year alone.
What does 185/70R15 mean on a 1981 Porsche 911?
On a 1981 Porsche 911, 185/70R15 is a metric radial tire size used on the front in the 15-inch setup. The 185 is the nominal section width in millimeters, 70 is the aspect ratio, R means radial construction, and 15 indicates the wheel diameter in inches.
Understanding the size helps prevent mixing unlike fitments across the car. That 15 at the end must match the wheel diameter, and the front size should remain paired with the proper rear size for the same wheel package so the car keeps its intended staggered tire arrangement.
Choosing the Right Tire
What should I consider when choosing a tire for a 1981 Porsche 911?
Start with the exact front or rear size and the wheel diameter actually on the car, because a 1981 Porsche 911 uses different sizes by axle and by wheel package. From there, compare construction details within the correct size, along with tire series, sidewall style, rim-width specification, and load information where it is given.
A blackwall performance radial may suit a more sporting presentation, while whitewall, redline, or raised white letter options can change the car’s visual character in certain sizes. It also helps to consider how the car is used, since a garage-kept collector 911 may call for different priorities than one driven more regularly.
What sidewall styles are available for 1981 Porsche 911 tires?
Blackwall is the most common sidewall style across 1981 Porsche 911 tire sizes, especially in the 16-inch fitments and in several 15-inch sport-oriented options. Selected sizes also offer wide whitewall, redline, and raised white letter treatments, particularly in 215/60R15 and in certain front sizes.
The right sidewall style depends on the look you want without losing sight of the correct size and wheel diameter. A more traditional or custom presentation may point toward whitewall or redline options, while a more understated or performance-oriented look usually keeps the car on blackwall tires.
What brands offer tires for the 1981 Porsche 911?
Tires for the 1981 Porsche 911 are available from Michelin, Dunlop, Avon, BFGoodrich, Vredestein, and American Classic, depending on the size. Brand availability changes with the specific front or rear fitment, so the selection in 185/70R15 is not the same as the selection in 225/50R16.
Brand choice is only part of the decision. It should be considered alongside tire series, sidewall treatment, and the intended use of the car, especially since some sizes lean toward classic-style offerings while others focus more heavily on modern blackwall radial performance options.
Restoration & Appearance
Which tire should I choose for a period-style 1981 Porsche 911?
A period-style 1981 Porsche 911 tire choice starts with keeping the correct front and rear size combination for the wheel package on the car. Within those sizes, blackwall options from established classic and performance-oriented series usually provide the most natural visual fit for the car’s late air-cooled era character.
Appearance decisions should still stay secondary to fitment accuracy. Owners pursuing a highly exact restoration should compare the car’s wheel setup and period references before settling on a brand or sidewall treatment, especially if originality standards matter more than simply achieving a vintage-inspired look.
How does tire construction affect the appearance of a restored 1981 Porsche 911?
On the 1981 Porsche 911, the primary fitments are already radial, so the construction question is less about bias-ply versus radial appearance and more about how each radial design presents itself. Differences in tread style, sidewall lettering, and whitewall or redline treatments can change the overall look noticeably.
A restored car aimed at a restrained factory-era feel will usually call for close attention to sidewall treatment and overall visual proportion. More customized cars may lean into whitewall, redline, or raised white letter styling, but the best result still depends on staying with the proper staggered sizing front to rear.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1981 Porsche 911?
Yes, modifications can affect tire fitment on a 1981 Porsche 911 even when the tire size itself is correct for the model. Changes such as aftermarket wheels, altered wheel widths, different offsets, suspension lowering, or bodywork changes can all influence clearance at the fenders, struts, and steering range.
That matters most on a staggered 911 because front and rear tire sizes already serve different roles. A car that has been changed from its original wheel package should have actual wheel diameter and width checked carefully, along with clearance under compression and at full steering lock before settling on replacement tires.
What should I inspect before driving a 1981 Porsche 911 on new tires?
Before driving a 1981 Porsche 911 on new tires, inspect wheel condition, confirm the tire sizes match the correct front and rear positions, and check inflation pressure carefully. It also helps to look over suspension and steering components, since worn bushings or alignment issues can affect how a staggered 911 setup behaves.
A short initial drive should be used to verify that nothing rubs and that the car tracks properly. After that, recheck pressure and look for any early signs of uneven contact or interference, especially if the car has not been driven regularly or has a wheel and tire package different from stock.
How should tires on a collector 1981 Porsche 911 be maintained?
Tires on a collector 1981 Porsche 911 should be maintained with regular pressure checks, visual inspections, and attention to age-related condition even if tread wear is minimal. Sidewall cracking, flat spotting from long storage, bulges, cuts, and gradual air loss are all worth watching on a low-use air-cooled car.
Storage conditions also matter. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps protect the tires, and moving the car periodically can reduce set-in wear from sitting. Any tire that shows questionable age or damage deserves closer evaluation before longer road use.
