The 1977 Porsche 930 sits at the beginning of Porsche’s turbocharged 911 road-car story, combining compact 911 proportions with the wider stance and harder-edged character that made the early Turbo such a distinct driver’s car. Tire fitment matters here because this model uses a staggered radial setup, with 205/55R16 in front and 225/50R16 in the rear on 16-inch rims. That gives the owner a modern metric radial starting point rather than a vintage bias-ply decision, but there is still meaningful choice in brand, tire series, and even sidewall presentation. Getting the right front-to-rear pairing matters just as much as choosing a tire that suits restoration appearance, road use, and the car’s actual wheel setup.
Which Tire Size Is Right for The 1977 Porsche 930
The 1977 Porsche 930 uses two primary tire sizes, and the split is tied to position on the car rather than interchangeable fitment. Both are radial tires for 16-inch rims, so the first step is confirming whether you are selecting a front or rear tire before comparing brands, series, and other product details.
205/55R16 is a metric radial size in which 205 identifies nominal section width in millimeters, 55 is the aspect ratio, and 16 is the wheel diameter in inches. On the 1977 Porsche 930, this is the front tire size, making it part of the car’s staggered performance-oriented setup rather than a universal four-corner size. Available choices include BFGoodrich, Michelin, and American Classic offerings, with blackwall and wide whitewall sidewall styles appearing in this size. This is the size to evaluate when you want to preserve the car’s front fitment while deciding how modern or how appearance-focused the finished look should be.
225/50R16 is a metric radial size with a 225-millimeter nominal section width, a 50-series profile, and a 16-inch rim diameter. On the 1977 Porsche 930, it serves as the rear tire size, so it works as part of the model’s front-to-rear stagger rather than as a substitute for the front fitment. Product choices in this size include BFGoodrich and Michelin blackwall radials across distinct tire series. It is the size to focus on when maintaining the proper rear setup and comparing tires by brand character, rim-width compatibility, and intended driving use.
Fitment on the 1977 Porsche 930 is straightforward once the tire’s position on the car is identified. The front and rear use different sizes, so choosing correctly means matching the tire to the proper end of the vehicle before comparing product options.
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1977 Porsche 930 Turbo Front
The 1977 Porsche 930 Turbo Front uses a 205/55R16 radial fitment on a 16-inch rim. That makes front tire selection a matter of staying with the correct metric radial size while comparing brand, series, and sidewall presentation within that front-specific fitment.
The 1977 Porsche 930 Turbo Rear uses a 225/50R16 radial fitment on a 16-inch rim. Rear tire selection should center on keeping that staggered setup intact and confirming wheel width and clearance before changing to a different tire within the same size.
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 1977 Porsche 930 Tires for Sale
Available 1977 Porsche 930 tires center on 205/55R16 and 225/50R16 radial choices from BFGoodrich, Michelin, and American Classic. Buyers can compare tire series, blackwall versus wide whitewall presentation in the front size, and rim-width compatibility across the staggered 16-inch setup.
These 1977 Porsche 930 tire FAQs focus on the staggered front-and-rear sizes, 16-inch rim fitment, radial tire choices, appearance considerations, and the checks that matter before road use on an early Turbo.
Tire Size & Fitment
What tire size fits a 1977 Porsche 930?
The 1977 Porsche 930 uses a staggered radial tire setup with 205/55R16 in the front and 225/50R16 in the rear. Both sizes are mounted on 16-inch rims, but they are not the same size at both ends of the car. The front and rear fitments each serve a specific position on the vehicle.
That means the first step is identifying whether you are replacing front tires, rear tires, or a complete set. A 930 with changed wheels or prior tire substitutions should be checked carefully so the actual wheel width, tire position, and clearance all match the intended front-to-rear combination before installation.
What size rim does a 1977 Porsche 930 use?
The 1977 Porsche 930 uses 16-inch rims with both of its primary tire sizes. The front 205/55R16 and rear 225/50R16 are both built around that 16-inch wheel diameter, so the rim diameter stays the same even though the tire widths and profiles differ from front to rear.
Wheel diameter is only part of the fitment picture, so it is still important to confirm the actual wheel width before choosing tires. Product options in the front size and rear size have different rim-width ranges, and an early 930 with aftermarket wheels should be checked closely before replacing the tires.
Why does the 1977 Porsche 930 have more than one tire size?
The 1977 Porsche 930 has more than one tire size because its fitment is staggered by position. The front uses 205/55R16, while the rear uses 225/50R16. Both are radial sizes on 16-inch rims, but they are assigned to different ends of the car rather than used interchangeably.
For the owner, that means tire selection starts with maintaining the correct front-to-rear arrangement. Mixing up the sizes or assuming all four tires should match can change the car’s intended setup, so replacement tires should be chosen with the correct position, wheel width, and overall vehicle configuration in mind.
Choosing the Right Tire
What should I consider when choosing tires for a 1977 Porsche 930?
Start with the correct staggered sizes: 205/55R16 for the front and 225/50R16 for the rear. From there, compare radial construction details, brand, tire series, and the rim-width range that matches each wheel. On this car, choosing the right tire means preserving the intended front and rear fitment rather than treating all four positions the same.
Appearance and use matter too. A blackwall performance-style radial suits the car’s later-period sporting character, while the 205/55R16 front size also offers a wide whitewall option for a more custom presentation. On a modified 930, confirm the actual wheel widths and clearances before choosing among the available tires.
What sidewall styles are available for 1977 Porsche 930 tires?
Blackwall is the main sidewall style available across the 1977 Porsche 930 tire offerings, and it appears in both the 205/55R16 front size and the 225/50R16 rear size. A wide whitewall option is also available in the 205/55R16 front size, giving that position a distinctly different visual treatment from the more typical blackwall choices.
Sidewall selection is mostly an appearance decision as long as the tire remains in the correct size and fits the wheel properly. Owners trying to keep a traditional sport-oriented look will usually stay with blackwalls, while a whitewall front tire creates a custom visual statement that should be considered as part of the full vehicle presentation.
What brands offer tires for the 1977 Porsche 930?
BFGoodrich, Michelin, and American Classic all offer tires for the 1977 Porsche 930 fitments covered here. BFGoodrich appears in both front and rear sizes with multiple g-Force series, Michelin appears in both sizes, and American Classic appears in the 205/55R16 front size with a wide whitewall radial option.
Brand choice should be evaluated alongside tire series, sidewall style, and wheel compatibility rather than in isolation. A front-and-rear staggered setup may also lead an owner to combine brand considerations with the need to keep both sizes available, so the complete paired fitment should be planned before replacing only one end.
Restoration & Appearance
Which tire should I choose for a period-style 1977 Porsche 930?
A period-style approach for a 1977 Porsche 930 usually begins with keeping the proper staggered radial sizing: 205/55R16 in front and 225/50R16 in the rear. From there, a blackwall radial generally preserves the restrained sporting appearance most buyers expect on an early Turbo, while still staying within the correct size framework.
Exact restoration goals can vary, especially on collector Porsches with changed wheels or long ownership histories. When originality matters beyond basic fitment, the safest approach is to confirm the car’s intended presentation through marque-specific references, then choose a tire that supports both the correct size layout and the desired visual character.
How does tire construction affect the appearance of a restored 1977 Porsche 930?
On a 1977 Porsche 930, construction is less about choosing between bias-ply and radial than about selecting the right style of radial within the correct sizes. This model uses modern metric radial fitment, so appearance differences come more from sidewall treatment and tire series character than from switching construction types.
That makes details like blackwall versus wide whitewall more visually important than they would be on many earlier collector cars. A restoration-oriented owner should keep the correct front and rear sizes first, then choose the sidewall and tire presentation that best matches the car’s finish, stance, and intended era-correct impression.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1977 Porsche 930?
Yes. Even when the correct tire sizes are 205/55R16 front and 225/50R16 rear, modifications can change whether a particular tire works well on the car. Aftermarket wheels, altered wheel widths, suspension changes, ride-height adjustments, and body modifications can all influence clearance and the suitability of a given tire choice.
A modified 930 should be checked at both the front and rear before replacement tires are chosen. Wheel width, steering clearance, fender clearance, and the actual tire position on the car matter more once the original setup has been changed, especially on a staggered-performance vehicle where front and rear fitment already differ.
What should I inspect before driving a 1977 Porsche 930 on new tires?
Before road use, inspect wheel condition, verify that the front and rear tires are mounted in the correct sizes, and confirm that inflation is set appropriately for the tires being used. It also helps to look for any signs of rubbing, uneven clearance, or interference at steering lock and through normal suspension movement.
A collector or low-use 930 deserves a broader check as well. Examine the older surrounding hardware for issues that can affect tire performance, and make sure there are no cracks, bulges, cuts, or unexplained air loss in any tire. A cautious test drive is a smart final step after installation and balancing.
How should tires on a collector 1977 Porsche 930 be maintained?
Tires on a collector 1977 Porsche 930 should be kept properly inflated, inspected regularly, and protected from the long periods of inactivity that can be hard on specialty vehicles. Because the car uses different front and rear sizes, each end should be checked individually for wear, aging, and any signs of irregular contact.
Storage conditions matter almost as much as mileage. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, while routine visual checks can catch cracking, flat spotting, or air loss before road use. Any 930 that sits often should have its tires reviewed before longer drives.
