The 1993 Porsche 928 sits at the end of Porsche’s front-engine grand touring era, blending V8 power, long-distance composure, and a distinctly modern shape for its time. In GTS form, it carries the kind of wide, purposeful stance that makes tire fitment especially important to both appearance and road manners. This model uses staggered 17-inch radial sizing, with 225/45R17 up front and 255/40R17 at the rear. Available choices include blackwall performance radials along with select raised white letter and redline options in the front size. The key decision is matching the correct front and rear fitment while choosing the look and tire character that best suits the car.
Which Tire Size Is Right for The 1993 Porsche 928
The 1993 Porsche 928 uses two primary tire sizes, and the difference is tied directly to position on the car rather than an interchangeable single-size setup. The front uses 225/45R17 and the rear uses 255/40R17, both in radial construction on 17-inch wheels. The first step is confirming that the car still has its correct staggered wheel arrangement before selecting among the available tire brands, series, and sidewall treatments.
In 225/45R17, the 225 is the nominal section width in millimeters, 45 is the aspect ratio, R designates radial construction, and 17 is the wheel diameter in inches. On the 1993 Porsche 928, this is the front tire size and it reflects the low-profile, modern performance fitment used on the GTS front position. Available options include BFGoodrich, Nitto, and Pro-Trac choices, with blackwall, raised white letter, and redline sidewall presentations depending on the tire series. This size matters most when preserving the intended front-end balance and selecting the appearance that best suits the car.
In 255/40R17, the 255 identifies the nominal section width in millimeters, 40 is the aspect ratio, R means radial construction, and 17 marks the wheel diameter in inches. For the 1993 Porsche 928, this is the rear tire size and it is part of the car’s staggered 17-inch setup rather than a universal four-corner fitment. Rear-size choices include BFGoodrich, Nitto, and Vredestein options in blackwall form across several performance-oriented series. This is the size to evaluate carefully when confirming rear wheel width and maintaining the car’s intended front-to-rear stance.
Sub-model fitment on the 1993 Porsche 928 is position-specific rather than shared across a single all-around tire size. Checking whether you are selecting for the GTS front or GTS rear matters because each position uses its own dedicated 17-inch radial size.
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1993 Porsche 928 GTS Front
The 1993 Porsche 928 GTS Front uses the narrower of the two staggered radial sizes, making front-position selection distinct from the rear. That means the focus should be on the correct front fitment first, then on choosing among the available brands, tire series, and sidewall styles that suit the car’s intended look and use.
The 1993 Porsche 928 GTS Rear uses its own wider radial size, separate from the front, as part of the car’s staggered layout. Rear tire selection should center on the correct size and wheel compatibility, then on comparing the available blackwall performance options for the rear position.
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 1993 Porsche 928 Tires for Sale
Available 17-inch radial choices for the 1993 Porsche 928 include BFGoodrich, Nitto, Pro-Trac, and Vredestein offerings across several performance-oriented series. Most options are blackwall, while the 225/45R17 front size also includes raised white letter and redline presentations for a more customized appearance.
Owners of a 1993 Porsche 928 usually need clear answers on staggered tire sizing, 17-inch rim fitment, front-versus-rear selection, available brands and sidewall styles, and the checks to make before road use on a grand touring car that may have seen wheel or suspension changes.
Tire Size & Fitment
What tire size fits a 1993 Porsche 928?
The 1993 Porsche 928 uses a staggered radial setup with 225/45R17 at the front and 255/40R17 at the rear. Both sizes fit 17-inch wheels, and they are not a single interchangeable all-around tire arrangement for this car.
That makes the first job identifying which position you are replacing rather than choosing one size for the entire vehicle. If the car still has its original-style staggered layout, front and rear tires should be selected by position, with wheel width and overall clearance checked carefully if aftermarket wheels or suspension changes are part of the current setup.
What size rim does a 1993 Porsche 928 use?
The 1993 Porsche 928 uses 17-inch rims with both of its primary tire sizes. The 225/45R17 front tire and the 255/40R17 rear tire are both built around a 17-inch wheel diameter, which is the common rim size for this application.
Wheel diameter is only part of the fitment picture, especially on a staggered-performance car like the 928 GTS. Before choosing tires, it is smart to confirm the actual wheel diameter stamped on the wheel, then compare wheel width and tire-to-body clearance so the selected front and rear sizes match the car’s current hardware.
Why does the 1993 Porsche 928 have more than one tire size?
The 1993 Porsche 928 has more than one tire size because it uses a staggered setup, with one size for the front and a wider size for the rear. The front position uses 225/45R17, while the rear uses 255/40R17.
For the buyer, that means tire selection depends on axle position, not just year, make, and model. A front tire should not be chosen as though it also serves the rear, and vice versa. On a car that may have been modified over time, checking the wheels currently installed is the best way to avoid ordering the right diameter but the wrong width range.
Choosing the Right Tire
What should I consider when choosing a tire for a 1993 Porsche 928?
Start with the correct position-specific size: 225/45R17 for the front and 255/40R17 for the rear. From there, compare radial tire series, sidewall presentation, rim-width compatibility, and load-related specifications where they are given, since the available choices are not identical across both sizes.
A 928 buyer is usually balancing two things at once: maintaining the car’s intended staggered look and selecting the tire character that matches how the car will be driven. Some owners will prefer a clean blackwall performance presentation, while others may want a more customized look up front, so reviewing front and rear choices together helps keep the set visually and functionally consistent.
What sidewall styles are available for 1993 Porsche 928 tires?
Blackwall is the primary sidewall style available for the 1993 Porsche 928 in both front and rear sizes. In the 225/45R17 front size, there are also raised white letter and redline choices, while the 255/40R17 rear options remain blackwall.
That means sidewall styling flexibility is greatest at the front of the car, not equally across the full staggered set. Anyone choosing a more distinctive front sidewall should think through how that presentation will pair with the rear tires, since a mismatched visual treatment can change the overall look of a car whose stance is a big part of its appeal.
What brands offer tires for the 1993 Porsche 928?
Tire options for the 1993 Porsche 928 include BFGoodrich, Nitto, Pro-Trac, and Vredestein, depending on size and position. BFGoodrich and Nitto appear in both sizes, Pro-Trac is available in the 225/45R17 front size, and Vredestein appears in the 255/40R17 rear size.
Brand choice should be considered alongside the exact tire series, sidewall style, and wheel-width suitability for the position you are replacing. On a staggered car, it is also worth checking whether you want matching brand presentation front to rear or whether you are simply replacing one axle while keeping the other size and brand already on the vehicle.
Restoration & Appearance
Which tire should I choose for a period-style 1993 Porsche 928?
A period-style approach to a 1993 Porsche 928 usually starts with keeping the correct staggered 17-inch sizing, using 225/45R17 in front and 255/40R17 in the rear. Blackwall radials will be the closest match to the restrained, modern performance look most buyers associate with a late 928.
Appearance decisions still depend on the direction of the car. A clean restoration-oriented build may lean toward matching blackwalls and consistent series character front to rear, while a more personalized presentation could use one of the available front sidewall treatments. If exact originality matters, owner documentation and marque-specific references remain the best guide for final appearance choices.
How does tire construction affect the appearance of a restored 1993 Porsche 928?
On a 1993 Porsche 928, tire construction is already modern radial, so the appearance question is less about bias-ply versus radial and more about profile, sidewall treatment, and overall visual balance. The low-profile 17-inch sizing is part of what gives the car its late-model grand touring stance.
That means a restoration-minded owner should pay close attention to how the front and rear tires look as a set. A blackwall setup keeps the presentation understated and contemporary to the car’s era, while raised white letter or redline treatment on the front size creates a more customized look that may shift the car away from a strictly stock-style visual impression.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1993 Porsche 928?
Yes. Modifications can affect tire fitment on a 1993 Porsche 928 even when the tire sizes remain 225/45R17 in front and 255/40R17 in the rear. Changes to wheel width, wheel offset, ride height, springs, or body clearance can all alter how comfortably those sizes work on the car.
That is especially important on a staggered setup where front and rear fitment are already different by design. A 17-inch diameter match alone does not settle the question. Cars with aftermarket wheels or lowered suspension should be checked for fender, inner clearance, and steering room before mounting replacement tires, particularly if the current setup differs from original-style wheel specifications.
What should I inspect before driving a 1993 Porsche 928 on new tires?
Before driving a 1993 Porsche 928 on new tires, inspect wheel condition, confirm that the front and rear sizes are mounted in the correct positions, and check inflation pressure, valve stems, and bead seating. It is also wise to make sure there is no visible interference at the fenders, suspension, or steering components.
A careful first road check matters on a grand touring car that may spend long periods parked and then return to highway use. After a short drive, recheck pressure and look for any signs of rubbing or uneven contact. If the car has older suspension parts, alignment issues, or modified wheels, those should be corrected early so the new tires wear evenly.
What should I check before a longer drive in a 1993 Porsche 928?
Before a longer drive in a 1993 Porsche 928, check tire pressure, tread condition, sidewalls, and any signs of air loss or impact damage. Confirm that the car still carries the correct staggered front and rear sizes and that the tires are free from cracking, bulges, or cuts.
Long-distance use places more importance on condition than appearance alone, especially on collector-era cars that may not be driven every week. It helps to inspect wheel fastener torque, verify that the spare and support equipment are in order, and look over suspension and alignment condition so the car remains stable and the tires do not develop rapid wear during the trip.
