The 1968 Austin America belongs to a period when compact British sedans were being engineered for efficient packaging, tidy road manners, and practical everyday use. Its front-wheel-drive layout and small-wheel stance give tire selection more importance than the car’s modest size might suggest. For this exact model, the key fitment question is whether to stay with the 5.95-12 bias-ply format or use the 145R12 radial size, both built for a 12-inch rim. That makes construction choice central, especially for owners balancing period-style appearance against modern radial behavior. Getting the right Austin America tire starts with the correct size, then moves to wheel compatibility, intended use, and overall presentation.
Which Tire Size Is Right for The 1968 Austin America
The 1968 Austin America uses two primary tire sizes, both on a 12-inch rim: 145R12 in radial construction and 5.95-12 in bias-ply construction. Since the same sub-model can use either size, the first decision is not trim level but which tire construction suits the car’s intended use, appearance, and wheel setup. After that, the choice becomes a matter of selecting the right tire within the correct size.
A 145R12 size uses a nominal section width of 145 millimeters, radial construction, and a 12-inch rim diameter. In this format, the aspect ratio is not stated in the size code, though this style is commonly associated with a tall-profile metric radial shape. On a 1968 Austin America, this size is the radial primary fitment and suits owners who want a more modern construction while staying within the car’s proper small-wheel sizing. Michelin offers this size in the Michelin MX series with a blackwall sidewall, giving the buyer a clear radial option in the correct format.
A 5.95-12 size is a numeric bias-ply designation in which the first number represents nominal section width in inches and the final number identifies a 12-inch rim. This is the traditional bias-ply format associated with many compact cars of the period and is the period-style construction choice for a 1968 Austin America. Buyers considering this size are usually focused on preserving an earlier tire look and feel rather than moving to a radial layout. The key step is confirming that the wheel and overall vehicle setup still suit a bias-ply tire in this original-style size.
Fitment is straightforward for the covered 1968 Austin America sub-model because the same two primary tire sizes apply. Checking the sub-model still matters so the tire can be matched to the exact car before choosing between radial and bias-ply construction.
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1968 Austin America Base
The 1968 Austin America Base can use either the 145R12 radial or the 5.95-12 bias-ply size on a 12-inch rim. That means the real choice is whether to keep a period-style bias-ply presentation or move to a radial in the correct overall fitment category.
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 1968 Austin America Tires for Sale
Available 1968 Austin America tire choices currently center on the 145R12 radial size, with a Michelin option in the Michelin MX series. That gives buyers a blackwall Euro-metric radial to compare against a restoration-oriented decision to retain the 5.95-12 bias-ply format.
These 1968 Austin America tire FAQs focus on the two correct sizes, 12-inch rim fitment, bias-ply versus radial selection, available product choices, and the basic inspection steps worth taking before putting a small vintage sedan back on the road.
Tire Size & Fitment
What tire size fits a 1968 Austin America?
The 1968 Austin America uses two primary tire sizes: 145R12 in radial construction and 5.95-12 in bias-ply construction. Both sizes are associated with a 12-inch rim, so the tire decision is centered on construction type as much as the size code itself.
That means the next step is confirming whether the car is still set up for a period-style bias-ply tire or has been fitted with wheels and preferences better suited to a radial. On a compact car like the Austin America, small changes in wheel width, suspension height, or prior modifications are worth checking before settling on one format.
What size rim does a 1968 Austin America use?
The 1968 Austin America uses a 12-inch rim with both of its primary tire sizes, 145R12 and 5.95-12. Even though the two tires use different sizing systems, they are both built around the same rim diameter.
Rim diameter is only part of the fitment picture, so it helps to verify wheel width and the actual wheels on the car before choosing a tire. That is especially important if the Austin America has replacement wheels, older service parts, or a mix of components that may not match the original small-car setup.
Does the 1968 Austin America Base use the same tire size?
Yes. The 1968 Austin America Base uses the same two primary fitment sizes as the model core: 145R12 in radial construction and 5.95-12 in bias-ply construction. There is no separate size split here that changes the basic tire decision.
Since the Base shares the same fitment choices, selecting a tire comes down to the car’s condition and the owner’s goals. A buyer preserving a more traditional look may lean toward the bias-ply format, while someone focused on radial construction should confirm wheel compatibility and clearance before moving forward with 145R12.
Bias-Ply & Radial Options
Is 5.95-12 a bias-ply or radial tire for the 1968 Austin America?
On a 1968 Austin America, 5.95-12 is the bias-ply tire size. It uses a vintage numeric sizing format, with 5.95 representing the nominal section width in inches and 12 indicating the rim diameter.
Choosing 5.95-12 usually appeals to owners who want a more traditional tire format and appearance for the car. The practical check is making sure the wheels, suspension condition, and intended use still support a bias-ply setup, especially if the Austin America has seen wheel changes or has been driven on modern radials in the past.
Should I use bias-ply or radial tires on a 1968 Austin America?
The 1968 Austin America can be fitted with either a 5.95-12 bias-ply tire or a 145R12 radial tire. The right choice depends on whether the goal is a more period-style presentation with bias-ply construction or a more modern construction approach within the correct 12-inch fitment range.
Construction choice affects more than appearance, so it is worth checking the actual wheel width, the overall condition of the suspension and steering components, and how the car will be used. A lightly used restoration may point in one direction, while a regularly driven Austin America may lead the owner to consider the radial option more seriously.
What should I check before converting my 1968 Austin America from bias-ply to radial tires?
Before converting a 1968 Austin America from 5.95-12 bias-ply tires to 145R12 radials, confirm that the car still has suitable 12-inch wheels and that the wheel width matches the radial tire being considered. It also helps to inspect suspension and steering components on a car of this age.
Clearance should be checked at full steering lock and through normal suspension movement, especially on a compact front-wheel-drive sedan where space can be limited. The car’s current ride height, any prior wheel changes, and the general condition of the chassis all matter when moving from one tire construction type to another.
Choosing the Right Tire
What should I consider when choosing a tire for a 1968 Austin America?
Start with the correct primary fitment: 145R12 if the goal is a radial tire, or 5.95-12 if the goal is a bias-ply tire. Since both sizes use a 12-inch rim, the important choice is how closely the tire should reflect a period-style setup versus a more modern radial construction.
After size and construction, compare details that affect actual fitment and use, such as wheel width, sidewall style, and product specifications where available. The Austin America’s compact proportions make it wise to verify the car’s current wheel and suspension setup rather than assuming every 12-inch wheel arrangement will suit either tire equally well.
What sidewall styles are available for 1968 Austin America tires?
For the currently available 145R12 radial option associated with the 1968 Austin America, the sidewall style is blackwall. That gives the car a clean, understated look that fits many compact import presentations without pushing the appearance toward a more decorative sidewall treatment.
Sidewall style matters most when the car is being restored or when the owner wants the tire appearance to match a particular era of use. Even with a simple blackwall choice, it still helps to balance appearance against construction type, because a blackwall radial and a period-style bias-ply can give the Austin America a noticeably different overall character.
What brands offer tires for the 1968 Austin America?
Michelin offers a 145R12 radial tire for the 1968 Austin America in the Michelin MX series. That gives buyers a recognized small-car radial option in the correct 12-inch fitment category for this model.
When comparing brands and product lines for a car like the Austin America, the first priority remains the correct size and construction rather than the brand name alone. A buyer should also compare wheel compatibility, intended driving use, and the overall appearance the tire gives the car, especially when deciding between radial and bias-ply directions.
Restoration & Appearance
Which tire should I choose for a period-style 1968 Austin America?
For a period-style 1968 Austin America, the 5.95-12 bias-ply size is the most natural starting point because it reflects the vintage numeric bias-ply format associated with cars of that era. It preserves the traditional sizing language and construction style that many restoration-minded owners prefer.
That does not automatically make every bias-ply tire the right visual match for every restoration, especially when details like tread style and sidewall presentation matter. When exact originality is important, it is worth checking marque references, period photos, or restoration documentation so the tire choice supports the way the finished car is meant to present.
How does tire construction affect the appearance of a restored 1968 Austin America?
Tire construction can noticeably change how a restored 1968 Austin America looks. A 5.95-12 bias-ply tire gives the car a more traditional small-sedan presentation, while a 145R12 radial keeps the fitment in the correct size family but shifts the visual impression toward a later, more modern tire style.
That difference matters on a compact car because the tire and wheel package is so visible relative to the body. Owners trying to preserve an earlier look often focus on the bias-ply format first, while those who want radial construction should consider whether the updated appearance still suits the restoration’s intended balance of authenticity and road use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1968 Austin America?
Yes. Modifications can affect tire fitment on a 1968 Austin America even when the tire size itself is correct. Wheel changes, altered ride height, replacement suspension parts, or body repairs around the wheel openings can all influence how a 145R12 radial or 5.95-12 bias-ply tire sits and clears.
A careful check should include wheel diameter, wheel width, steering clearance, and the space available through suspension travel. On a small vintage sedan, minor changes can matter more than they would on a larger car, so the safest approach is to inspect the actual vehicle rather than relying only on the nominal tire size.
What should I inspect before driving a 1968 Austin America on new tires?
Before driving a 1968 Austin America on new tires, inspect the wheels for damage or corrosion, confirm the tires are seated properly, and look over the steering and suspension for looseness or worn parts. It is also smart to check for any rubbing points at full lock and during normal suspension movement.
On an older car, tire condition is only one part of road readiness. Tire pressure, wheel fastener torque, visible sidewall condition, and any signs of air loss deserve attention before regular use, especially if the car has been stored for long periods or is returning to the road after a restoration or mechanical refresh.
How should tires on a collector 1968 Austin America be maintained?
Tires on a collector 1968 Austin America should be checked regularly for pressure loss, sidewall cracking, cuts, bulges, and uneven tread wear. Low-use collector cars often age their tires before they wear them out, so visual condition matters just as much as remaining tread depth.
Storage habits also make a difference. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps protect the tires, and periodic inspections are worthwhile even when the car is rarely driven. A short check before each outing can catch aging or clearance issues before they become a road-use problem.
