The 1975 Audi 100 came from an era when Audi was building its reputation in the U.S. around clean engineering, restrained styling, and efficient European road manners. For owners today, that makes tire choice more than a simple replacement decision, because this sedan can be approached either through its later radial fitment or a more traditional bias-ply presentation. The 1975 Audi 100 uses 165R14 radial and, on some versions, 560-14 bias-ply tires on 14-inch rims. That opens the door to different period-style looks, construction types, and brand choices. The right selection depends on the exact sub-model, the wheels on the car, and whether the goal is road use, restoration character, or both.
Which Tire Size Is Right for The 1975 Audi 100
The 1975 Audi 100 uses two primary tire sizes, and the right one depends on the specific sub-model and construction choice. Both sizes fit 14-inch rims, but 165R14 is a radial size while 560-14 is a bias-ply size, so the first step is confirming whether the car is a Base, GL, or LS and then checking the wheel setup before choosing a tire.
165R14 is a Euro-metric radial size. The 165 identifies nominal section width in millimeters, the R indicates radial construction, and the 14 identifies a 14-inch rim; in this format, the profile is conventionally treated as an 80-series style. On the 1975 Audi 100, this size suits owners who want a radial tire in the car’s original sizing language. Available choices include blackwall options from Pirelli, Michelin, and Vredestein across series such as Cinturato CA67, Michelin XAS, and Sprint Classic, giving buyers room to compare brand character, rim-width compatibility, and intended use.
560-14 is a numeric bias-ply size. The 560 represents a nominal section width of about 5.60 inches, with the final 14 indicating a 14-inch rim diameter. On the 1975 Audi 100, this size creates a distinctly traditional bias-ply presentation and is relevant only to the sub-models that use it. The available BFGoodrich Silvertown Classic Bias Ply options include blackwall, narrow whitewall, and wide whitewall versions, making this size especially important for owners focused on a restoration-oriented look, while still requiring a check of wheel width and overall vehicle setup.
Sub-model fitment matters on the 1975 Audi 100 because not every version uses the same construction choices. Base and GL models can be fitted with either radial or bias-ply primary sizes, while the LS stays with the radial size, so identifying the exact model prevents choosing the wrong tire type.
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1975 Audi 100 Base & GL
The 1975 Audi 100 Base & GL can use either the 165R14 radial or the 560-14 bias-ply size on a 14-inch rim. That gives owners a more involved decision between radial road manners and a more traditional bias-ply appearance, along with sidewall and brand choices within each construction.
The 1975 Audi 100 LS uses the 165R14 radial size. Tire selection here is more straightforward, with the main decision centered on choosing among the available blackwall radial options and confirming that the car still retains the correct 14-inch wheel setup.
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 1975 Audi 100 Tires for Sale
Available 1975 Audi 100 tire options split clearly between 165R14 blackwall radials from Pirelli, Michelin, and Vredestein, and 560-14 BFGoodrich bias-ply tires in blackwall, narrow whitewall, and wide whitewall form. That gives buyers a useful contrast in construction, appearance, tire series, and rim-width range.
These 1975 Audi 100 tire FAQs focus on the two primary sizes, how fitment changes by sub-model, and how to choose between radial and bias-ply options while keeping wheel compatibility, appearance, and road use in mind.
Tire Size & Fitment
What tire size fits a 1975 Audi 100?
The 1975 Audi 100 uses two primary tire sizes: 165R14 in radial construction and 560-14 in bias-ply construction. Both are 14-inch tire sizes, but they are not used the same way across the range, because the LS uses 165R14 while Base and GL models can use either 165R14 or 560-14.
That means the first step is identifying the exact sub-model and then confirming the wheels currently on the car. A 14-inch rim is common to both sizes, but wheel width, restoration goals, and whether the car remains in original-style configuration all matter before selecting between the radial and bias-ply fitments.
What size rim does a 1975 Audi 100 use?
The 1975 Audi 100 uses a 14-inch rim with both of its primary tire sizes, 165R14 and 560-14. Rim diameter is straightforward here because both the radial and bias-ply fitments share the same 14-inch wheel diameter, even though the tire constructions and sizing systems are different.
The practical check is wheel width, not just diameter. The available 165R14 radial products use different rim-width ranges than the 560-14 bias-ply products, so a car with replacement wheels or a non-original wheel setup should have its actual wheel dimensions verified before a tire is chosen.
Do all 1975 Audi 100 sub-models use the same tire size?
No. The 1975 Audi 100 LS uses 165R14 radial tires, while the Base and GL sub-models can use either 165R14 radials or 560-14 bias-ply tires. That makes the Audi 100 a case where sub-model identification matters, even though every version uses a 14-inch rim diameter.
This affects more than just the size printed on the sidewall. Construction type changes the look and character of the tire, and the two sizes also point to different wheel-width ranges and product styles. Checking the exact sub-model and current wheel setup helps narrow the search before comparing brands or sidewall treatments.
Bias-Ply & Radial Options
Is 560-14 a bias-ply or radial tire for the 1975 Audi 100?
560-14 is a bias-ply tire size on the 1975 Audi 100. It uses the older numeric sizing system, with 560 referring to nominal section width and 14 referring to rim diameter, and it appears on Base and GL sub-models rather than the LS, which uses the 165R14 radial size.
That distinction matters because a bias-ply tire changes both presentation and wheel requirements compared with the radial option. A 560-14 Audi should have its wheel width checked carefully, especially if the car has been modified or converted over the years, since a 14-inch diameter match alone does not settle full compatibility.
Should I use bias-ply or radial tires on a 1975 Audi 100?
The answer depends on the sub-model, the wheels on the car, and what the car is being built or maintained for. A 1975 Audi 100 LS stays with the 165R14 radial fitment, while Base and GL models can be approached with either the 165R14 radial or the 560-14 bias-ply size.
A radial choice keeps the car in a European radial sizing format, while a bias-ply choice gives a more traditional period-style look. The better path is to match the tire to the actual wheel dimensions, driving plans, and restoration goals rather than treating the two constructions as automatically interchangeable.
What should I check before converting my 1975 Audi 100 from bias-ply to radial tires?
Start by confirming that the Audi 100 actually uses the sub-model fitment that allows both constructions, since the LS already uses the 165R14 radial size. On a Base or GL, moving from 560-14 bias-ply to 165R14 radial means comparing the wheel width, tire clearance, and the car’s present wheel and suspension setup.
A 14-inch rim diameter match is only one part of the decision. The car should also be checked for steering clearance, fender space, and any wheel changes made during past service or restoration. That is especially important on older imported cars where a previous owner may have changed wheels without keeping original dimensions.
Choosing the Right Tire
What should I consider when choosing a 165R14 tire for a 1975 Audi 100?
The first considerations are sub-model and wheel setup. The 1975 Audi 100 LS uses 165R14, and Base and GL models can also use that radial size, so the next step is comparing the available radial products by brand, tire series, and rim-width range rather than treating every 165R14 the same.
Pirelli, Michelin, and Vredestein each offer a blackwall 165R14 option, with series including Cinturato CA67, Michelin XAS, and Sprint Classic. That lets buyers weigh period-style appearance, published rim-width suitability, and product details such as load or weight where available, while keeping the original 14-inch fitment in focus.
What sidewall styles are available for 1975 Audi 100 tires?
Sidewall choice depends on which primary tire size is being used. The 165R14 radial options for the 1975 Audi 100 are available as blackwalls, while the 560-14 bias-ply options include blackwall, narrow whitewall, and wide whitewall versions within the BFGoodrich Silvertown Classic Bias Ply line.
That gives the Audi 100 owner a clear appearance decision. A blackwall radial keeps the car in a restrained European style, while whitewall bias-ply options create a more traditional presentation. The sidewall should be chosen only after confirming the correct size and construction for the sub-model and wheel setup on the car.
What brands offer tires for the 1975 Audi 100?
The 1975 Audi 100 has tire options from Pirelli, Michelin, Vredestein, and BFGoodrich. The 165R14 radial size is offered by Pirelli, Michelin, and Vredestein, while the 560-14 bias-ply size is offered by BFGoodrich through the Silvertown Classic Bias Ply series.
That brand spread reflects two very different buying paths. A shopper staying with 165R14 can compare established European-style radial offerings, while someone choosing 560-14 is deciding among sidewall treatments within a traditional bias-ply line. The right comparison starts with the correct size and construction, then moves to series and appearance.
Restoration & Appearance
Which tire should I choose for a period-style 1975 Audi 100?
A period-style 1975 Audi 100 can be approached in two distinct ways. The 165R14 radial keeps the car in a classic European radial format, while the 560-14 bias-ply size offers a more traditional vintage presentation for Base and GL models that use that fitment on 14-inch rims.
The better choice depends on the kind of restoration or preservation you are pursuing. Owners focused on European road-car character often stay with the radial format, while those drawn to older visual cues may prefer bias-ply styling. When exact originality matters, vehicle-specific historical references should guide brand and appearance details.
How does tire construction affect the appearance of a restored 1975 Audi 100?
Construction changes the visual character of the tire as much as the ride character. On a 1975 Audi 100, a 165R14 radial presents the car in a later European-style radial format, while a 560-14 bias-ply gives a more old-school profile and opens the door to blackwall, narrow whitewall, or wide whitewall styling.
That visual difference matters on a restored car because the tire strongly influences stance and overall impression. A buyer should decide early whether the goal is a restrained European sedan look or a more overtly vintage presentation, then match that choice to the correct sub-model fitment and wheel dimensions.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1975 Audi 100?
Yes. Even though the 1975 Audi 100 uses 14-inch tire sizes, modifications can change whether a specific tire choice remains appropriate. Aftermarket wheels, altered wheel width, suspension changes, or body and fender work can all affect the suitability of either the 165R14 radial or the 560-14 bias-ply fitment.
A modified car should be checked as it sits, not as it left the factory decades ago. Wheel diameter, wheel width, steering clearance, and available space around the tire matter most, especially on a vehicle that may have seen owner changes over time. That check should happen before choosing construction or sidewall style.
What should I inspect before driving a 1975 Audi 100 on new tires?
Before road use, inspect the wheels, valve stems, lug hardware, and the general condition of the suspension and steering components. A 1975 Audi 100 also deserves a close look at tire pressure, sidewall condition, tread surface, and whether the mounted tires match the intended size and construction for the sub-model.
Older collector vehicles often spend long periods parked, so age and inactivity can be just as important as tread depth. It also helps to confirm that the tires clear the fenders and suspension through steering travel and that the wheel dimensions suit the selected tire, especially if the car has changed hands several times.
How should 165R14 and 560-14 tires on a collector 1975 Audi 100 be maintained?
Collector-car tire care starts with regular inspection rather than waiting for high mileage. On a 1975 Audi 100, both 165R14 radial and 560-14 bias-ply tires should be checked for air loss, cracking, bulges, cuts, uneven wear, and signs that the car has been sitting too long in one position.
Storage conditions also matter because long exposure to sunlight, moisture, heat, or ozone sources can shorten tire life on low-use vehicles. Keeping the tires properly inflated and moving the car periodically helps, and any Audi that has sat for an extended time should have its tires and wheel condition reviewed before returning to regular road use.
