The 1985 Porsche 928 sits in the era when Porsche’s front-engine grand touring coupe had matured into a fast, refined high-speed machine with distinctly modern road manners. Buyers looking at one today are usually balancing original character with confident real-world use. Tire fitment centers on a single primary size, 225/50R16, in radial construction on a 16-inch rim. Within that size, the meaningful choices come from blackwall performance-oriented options from BFGoodrich and Michelin across different tire series. For a road-driven 928, the decision is less about finding the correct size and more about choosing the right tire character, confirming wheel compatibility, and matching the car’s current setup.
Which Tire Size Is Right for The 1985 Porsche 928
The 1985 Porsche 928 uses one primary tire size: 225/50R16 radial on a 16-inch rim. The covered 928 S sub-model uses that same size, so the key decision is not between multiple primary fitments but between the available radial tire choices, their performance character, and whether the car still retains its original wheel and suspension setup.
In 225/50R16, the 225 identifies nominal section width in millimeters, 50 is the aspect ratio, R marks radial construction, and 16 is the rim diameter in inches. For the 1985 Porsche 928, this is a modern metric radial fitment that suits the car’s grand touring and performance-oriented character. Available choices in this size include blackwall offerings from BFGoodrich and Michelin across g-Force and Pilot Sport series. Selecting within 225/50R16 comes down to matching the tire to the car’s actual wheel width, intended driving use, and the balance you want between period presentation and later radial performance feel.
Fitment is straightforward for the covered sub-model because the same primary tire size is used throughout. Checking the exact sub-model still matters so the tire choice stays aligned with the car’s wheel setup and intended road use.
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1985 Porsche 928 S
The 1985 Porsche 928 S uses the same 225/50R16 radial tire fitment as the core model coverage here. That keeps size selection simple, leaving the real choice between available blackwall radial products, wheel-width compatibility, and the kind of road behavior expected from the car.
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 1985 Porsche 928 Tires for Sale
Available 225/50R16 choices focus on blackwall radial performance tires from BFGoodrich and Michelin. The main comparisons are tire series, overall tire character, and shared 16-inch rim fitment with 6.0- to 8.0-inch rim-width compatibility.
These FAQs focus on the 1985 Porsche 928’s 225/50R16 fitment, 16-inch wheel compatibility, available radial tire choices, and the checks that matter before putting a collector-era grand touring Porsche back on the road.
Tire Size & Fitment
What tire size fits a 1985 Porsche 928?
The 1985 Porsche 928 uses a 225/50R16 radial tire. That size is also used on the covered 1985 Porsche 928 S sub-model, so the primary fitment question is fairly straightforward for this year and model.
Once the size is confirmed, the next step is making sure the car still has the proper 16-inch wheel setup and that wheel width remains appropriate for the tire being considered. Any aftermarket wheel change, suspension alteration, or long-stored vehicle should be checked before mounting a new set.
What size rim does a 1985 Porsche 928 use?
The 1985 Porsche 928 uses a 16-inch rim with its 225/50R16 tire fitment. Available tires in this size are built for 16-inch applications, and the product range here supports rim-width compatibility from 6.0 to 8.0 inches.
Rim diameter is the first number to verify on the wheel itself, especially if the car has changed hands or received later wheels. Width matters too, since a tire may share the right diameter but still need an appropriate wheel width and enough clearance at the suspension and fender.
Does the 1985 Porsche 928 S use the same tire size?
Yes. The covered 1985 Porsche 928 S uses the same 225/50R16 radial tire size. That means the sub-model does not introduce a separate primary size choice within this page’s fitment coverage.
Even with shared sizing, the actual tire decision can still vary based on how the car is used. A 928 S that sees regular road miles, occasional spirited driving, or mostly preservation-minded use may lead its owner toward a different tire series, even though the base size remains the same.
Choosing the Right Tire
What should I consider when choosing a 225/50R16 tire for a 1985 Porsche 928?
Start with the correct size, radial construction, and 16-inch wheel fitment. From there, compare the tire series available in 225/50R16, the brand options, blackwall presentation, rim-width compatibility, and product details such as load capacity or weight when those differences matter to your intended use.
A road-driven grand touring Porsche usually benefits from a tire choice that matches the car’s actual role today rather than just its age. Confirm wheel width, inspect the suspension and alignment condition, and decide whether the goal is mostly preservation, regular highway use, or a more performance-oriented driving experience.
What brands offer tires for the 1985 Porsche 928?
The 1985 Porsche 928 has 225/50R16 tire options from BFGoodrich and Michelin. Within that fitment, BFGoodrich appears in g-Force series offerings, while Michelin is represented by the Pilot Sport series.
Brand alone should not be the whole decision. It makes more sense to compare the tire series within the correct size, the wheel-width suitability, and the kind of use the car will see. A 928 that is driven regularly may call for a different emphasis than one used more sparingly.
What tire series are available for the 1985 Porsche 928?
In 225/50R16, the available tire series for the 1985 Porsche 928 include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Comp 2 AS, and Michelin Pilot Sport. All are radial blackwall options built around the same basic fitment size.
Those series differences give the buyer something meaningful to compare even when the size stays fixed. Looking at tire series helps narrow the choice by intended driving style, while wheel-width fit, vehicle condition, and the 928’s current alignment and suspension state should still be checked before final selection.
Restoration & Appearance
Which tire should I choose for a period-style 1985 Porsche 928?
A period-style approach for a 1985 Porsche 928 starts with retaining the correct 225/50R16 size and radial construction. Since the available choices here are blackwall radials, the visual character stays appropriately restrained and performance-oriented rather than moving toward a more overt vintage sidewall treatment.
For a restoration-minded car, correct fitment usually matters more than chasing a dramatic appearance change. If exact originality is the goal, compare the tire choice against marque references, historic photos, or other vehicle-specific documentation, then confirm that the wheel dimensions on the car still match the intended tire.
Does correct tire fitment matter for a 1985 Porsche 928 restoration?
Yes, correct tire fitment matters on a 1985 Porsche 928 restoration because the car’s stance, wheel-well appearance, and road manners all depend on using the proper size category. For this model year, that means staying with the 225/50R16 radial fitment on a 16-inch rim.
A restoration can look right at first glance and still lose accuracy if the tire profile or wheel package has drifted away from the intended setup. Measuring the installed wheels, checking for suspension changes, and choosing a tire that respects the car’s original fitment approach will usually produce the most convincing result.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1985 Porsche 928?
Yes. Modifications can change how a 225/50R16 tire works on a 1985 Porsche 928 even when the size itself is correct. Aftermarket wheels, width changes, offset differences, lowering, spring changes, or body alterations can all affect clearance and the way the tire sits on the car.
Any modified 928 should be checked at the wheel, suspension, and fender before a new tire is selected. Turning clearance, suspension travel, and the actual wheel dimensions matter just as much as the printed tire size, especially on a performance-oriented car that may no longer sit at stock ride height.
What should I inspect before driving a 1985 Porsche 928 on new tires?
Before driving a 1985 Porsche 928 on new tires, inspect the wheels for correct diameter and condition, confirm the lug hardware is appropriate, and look over the suspension, steering, and alignment-related components. Tire pressure should also be set properly, and any sign of rubbing or uneven placement should be addressed first.
A collector-era Porsche can hide age-related issues even after fresh tires are installed. Checking for brake drag, worn bushings, leaking shocks, and hardened suspension parts helps the new tires perform as intended. A short, careful road test is a smart final step before committing the car to regular or higher-speed use.
How should 225/50R16 tires on a collector 1985 Porsche 928 be maintained?
225/50R16 tires on a collector 1985 Porsche 928 should be maintained with regular pressure checks, periodic visual inspection, and attention to tread wear and sidewall condition. Low-mileage use does not eliminate the need for inspection, because age, storage, and inactivity can affect the tire even when tread still looks strong.
Good maintenance also includes keeping the car stored away from prolonged heat, direct sunlight, moisture, and ozone sources such as certain motors or generators. Moving the car occasionally, watching for air loss, and checking for cracks, bulges, or vibration before longer drives can prevent problems from appearing on the road.
