The 1991 Audi 100 came from a period when Audi was refining its reputation for understated engineering, high-speed stability, and clean European sedan design. For many owners, it remains a practical modern classic that blends everyday drivability with collector-era character. The 1991 Audi 100 uses a single primary tire size, 195/65R15, in radial construction on a 15-inch rim. That keeps fitment straightforward, but there is still room to choose a tire that matches the car’s intended use and presentation. For a well-kept driver or a preservation-minded example, the real focus is selecting the right radial tire while confirming wheel specs and overall condition before road use.
Which Tire Size Is Right for The 1991 Audi 100
The 1991 Audi 100 uses one primary tire size: 195/65R15. It is a radial tire sized for a 15-inch rim, and that same fitment applies to the Base sub-model. With only one primary size to sort out, the main decision is choosing the right tire within that fitment and confirming that the car still has the correct wheel setup if it has ever been modified.
195/65R15 is a metric radial size where 195 indicates the nominal section width in millimeters, 65 is the aspect ratio, R identifies radial construction, and 15 is the wheel diameter in inches. On the 1991 Audi 100, this modern metric format suits the car’s original-era balance of comfort, stability, and everyday road manners. Because the fitment is already a radial, the choice is less about changing construction and more about selecting a tire that matches the car’s driving use and wheel specifications. It is also wise to confirm that the car still wears the proper 15-inch wheels before making a final selection.
Tire fitment is straightforward for the covered 1991 Audi 100 sub-models. The key benefit of checking the sub-model is simply confirming that the car remains on its intended wheel and tire setup before choosing a replacement.
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1991 Audi 100 Base
The 1991 Audi 100 Base uses the same 195/65R15 radial fitment found across this model coverage. That makes tire selection fairly direct, with the real focus on choosing a suitable radial tire and verifying that the car has not been changed to a different wheel diameter over time.
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.
Frequently Asked Questions
Common questions for the 1991 Audi 100 usually center on its 195/65R15 tire size, 15-inch rim fitment, replacement selection, and the checks worth making before putting a low-use older sedan back on the road.
Tire Size & Fitment
What tire size fits a 1991 Audi 100?
The 1991 Audi 100 uses a 195/65R15 tire size. That is a radial tire format, and it is the primary fitment for this model coverage, including the Base sub-model. For most owners, that means the basic size question is simple because there is only one main fitment to match.
The practical next step is confirming that the car still has 15-inch wheels and has not been changed to an aftermarket wheel package. On an older Audi sedan, wheel swaps can happen over time, so checking the actual wheel diameter and overall clearance before purchasing tires helps avoid ordering the right size for the model but the wrong size for the car as it sits today.
What size rim does a 1991 Audi 100 use?
The primary tire fitment for a 1991 Audi 100 is built around a 15-inch rim. That rim diameter matches the 195/65R15 tire size, where the final number in the size code identifies the wheel diameter in inches. The covered fitment keeps the car in a straightforward modern radial sizing format.
Rim diameter is only part of the check, especially on a vehicle that may have seen decades of service or modification. It is smart to verify wheel width, inspect for bent or damaged rims, and make sure all four wheels match before mounting new tires. Even when the diameter is correct, wheel condition and compatibility still matter for proper tire seating and road manners.
Does the 1991 Audi 100 Base use the same tire size?
Yes. The 1991 Audi 100 Base uses the same 195/65R15 radial tire size. That keeps replacement selection much simpler than a model lineup where trim levels or performance packages change the wheel and tire fitment from one version to another.
Even with shared fitment, it is still worth checking the car itself rather than assuming every surviving example remains exactly as built. Older sedans are often fitted with replacement wheels during their lives, and mismatched wheel sets are not unusual. Verifying the installed wheel diameter and the condition of the suspension and steering components helps the new tires perform as intended.
Choosing the Right Tire
What should I consider when choosing a 195/65R15 tire for a 1991 Audi 100?
Start with the correct size, 195/65R15, and make sure the tire is intended for a 15-inch wheel. Since the 1991 Audi 100 already uses a radial fitment, the main selection factors are wheel compatibility, the condition and intended use of the car, and whether the tire suits a preserved weekend sedan or a regularly driven example.
Looking beyond size alone is especially important on an older European car. Check that the wheels are straight, the suspension is in good order, and the tire choice matches how the car will actually be driven. A lightly used collector car and a daily road car can share the same size while still calling for a different emphasis on ride quality, handling feel, and overall presentation.
How do I choose between the available 195/65R15 tires for a 1991 Audi 100?
The best way to compare 195/65R15 tires for a 1991 Audi 100 is to begin with fitment, then narrow the choice by the car’s role. A well-kept original car, a frequently driven sedan, and a long-stored project can all use the same size, but the right tire for each may differ in feel, driving priorities, and overall character.
Focus on compatibility first, then compare construction details and the condition of the rest of the chassis. Tires cannot compensate for worn shocks, loose steering parts, or poor alignment. Once the wheel setup is confirmed, choose the tire that best fits the vehicle’s intended use and the driving experience you want from a 1991 Audi 100 rather than selecting by size alone.
What rim-fitment details should I compare when choosing 1991 Audi 100 tires?
The critical rim-fitment detail is the 15-inch wheel diameter required by the 195/65R15 size. Beyond diameter, the wheels should be inspected for condition, matched sizing, and overall compatibility with the tire you plan to use. Those details matter just as much as the printed size when replacing tires on an older Audi.
A careful wheel check helps prevent fitment problems that are easy to miss at first glance. Confirm that the wheels are not bent, that there is adequate clearance at the fenders and suspension, and that the car is not running a mixed set from past repairs or modifications. Taking a few minutes to verify the wheel setup can save time and avoid mounting issues later.
Restoration & Appearance
Which tire should I choose for a period-style 1991 Audi 100?
For a period-style 1991 Audi 100, the starting point is staying with the proper 195/65R15 radial size on a 15-inch wheel. Because this Audi already uses a modern metric radial format, maintaining the correct sizing and proportions does a great deal to preserve the car’s original-era stance and overall visual balance.
Appearance on a 1991 Audi 100 is often influenced more by tire profile and wheel correctness than by dramatic vintage sidewall treatments. If originality is especially important, compare the car against marque references, period photography, or trusted enthusiast guidance. That helps keep the tire choice aligned with the character of the car without assuming every modern tire in the size will look the same.
Does correct tire fitment matter for a 1991 Audi 100 restoration?
Yes, correct tire fitment matters on a 1991 Audi 100 restoration because the tire size affects both how the car sits and how it drives. Using the proper 195/65R15 radial size keeps the wheel-and-tire relationship in line with the model’s intended proportions and helps preserve the restrained, balanced look that suits this Audi sedan.
Fitment also matters mechanically, not just visually. A restoration-minded owner should confirm wheel diameter, inspect for non-original wheel changes, and check clearance before settling on replacement tires. Even a nicely finished car can lose some of its proper stance and road feel if the wheel and tire package has drifted away from the correct size over the years.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1991 Audi 100?
Yes, modifications can affect tire fitment on a 1991 Audi 100 even when the intended size is still 195/65R15. Aftermarket wheels, suspension changes, altered ride height, or body repairs can all change how much space the tire has around the fenders, steering components, and suspension parts. That is why the car itself should always be checked.
An older Audi may have gone through several owners, so it is worth looking for non-original wheels or evidence of previous setup changes before mounting new tires. Steering clearance at full lock, fender room over bumps, and overall wheel condition are all worth inspecting. Small differences in the car’s current setup can matter even when the printed tire size is correct.
What should I inspect before driving a 1991 Audi 100 on new tires?
Before driving a 1991 Audi 100 on new tires, inspect the wheels, valve stems, alignment condition, and the general state of the suspension and steering. New tires perform best when mounted on straight, properly matched wheels and supported by healthy chassis components. It is also smart to confirm air pressure and look over the tires after installation.
A short test drive should include listening for rubbing, vibration, or pull through the steering. Recheck pressure after the first few drives and inspect for any signs of uneven wear as the tires begin to settle in. On a collector-age sedan, fresh tires can reveal existing suspension or alignment issues that were less obvious when the old tires were worn out.
How should 195/65R15 tires on a collector 1991 Audi 100 be maintained?
195/65R15 tires on a collector 1991 Audi 100 should be maintained with regular pressure checks, visual inspections, and attention to age as well as tread depth. A car that is driven only occasionally can still develop sidewall cracking, flat spotting, air loss, or weather-related deterioration even if the tires do not accumulate many miles.
Good storage habits help just as much as routine inspection. Keep the car away from prolonged sunlight, excess moisture, and long periods on underinflated tires, and move it occasionally if it sits for extended stretches. Before any longer drive, inspect the tread and sidewalls closely and make sure the tires, wheels, and suspension are all ready for road use.
