In 1965 Austin covered a wide slice of the British market, from tiny city cars and sporting small-bore favorites to practical family saloons. That breadth matters because 1965 Austin was not a one-size-fits-all tire year: seven models used eleven distinct tire sizes spread across 10-, 12-, 13-, and 14-inch rims. Several models present a choice between an era-correct bias-ply size and a radial alternative, while others stand apart with their own model-specific fitment. The first step is to identify your exact model, then decide whether your priority is period appearance, original-style construction, or the road manners that come with a radial tire.
Which Tire Size Is Right for Your 1965 Austin
1965 Austin vehicles use 11 different tire sizes, and those sizes vary by model rather than carrying across the full lineup. In several cases the real choice is between a bias-ply size and a radial size for the same model, while other Austin models use their own rim diameter and size family altogether. Understanding that distinction before choosing a product saves time and helps you match the tire to the right car and wheel.
Year(s): 1965|Fit(s): 1100|Construction: Radial|Rim: 12 in
145R12 is a radial metric size with a nominal section width of 145 millimeters and a 12-inch rim diameter, with the missing aspect ratio conventionally treated as an 80-series profile. This size is available from Michelin in a blackwall tubeless configuration with an S speed rating, good for speeds up to 112 mph. On a 1965 Austin 1100, this radial size suits owners who want a more modern-feeling driving character while staying within the model's correct rim diameter.
Year(s): 1965|Fit(s): 1100|Construction: Bias Ply|Rim: 12-in rim
5.50-12 is a numeric bias-ply size in which 5.50 refers to nominal section width in inches and 12 is the rim diameter. It is a model-specific size for the 1965 Austin 1100 and represents the original-style construction choice for that car. Buyers restoring an 1100 for a more period-correct look and feel will usually gravitate to this kind of bias-ply fitment rather than the radial alternative.
Year(s): 1965|Fit(s): 1800|Construction: Radial|Rim: 13-in rim
175R13 is a radial metric size with a nominal width of 175 millimeters on a 13-inch rim, with the unstated profile conventionally treated as an 80-series radial. This size is specific to the 1965 Austin 1800 and serves as that model's radial-format fitment. Owners who use an Austin 1800 regularly and want a radial construction should focus on this size rather than the narrower and smaller Austin fitments used elsewhere in the range.
Year(s): 1965|Fit(s): 1800|Construction: Bias Ply|Rim: 13 in
650-13 is a numeric bias-ply size, with 6.50 indicating nominal section width in inches and 13 indicating the rim diameter. It is available from Coker Classic and US Royal in both wide whitewall and narrow whitewall styles, with load ratings of 1,150 pounds at 32 psi. For a 1965 Austin 1800, this size is the more traditional bias-ply route and will appeal to owners aiming for a more period-oriented presentation than a radial delivers.
Year(s): 1965|Fit(s): 850, Mini Cooper|Construction: Radial|Rim: 10 in
145R10 is a radial metric size with a 145-millimeter nominal section width on a 10-inch rim, with the absent profile conventionally understood as an 80-series radial. Firestone, Kings, Camac, and Dunlop offer this size in blackwall form, and speed or load details vary by product; Dunlop carries an S speed rating with a 112 mph ceiling, while Camac and Dunlop publish load figures around 694 pounds. This size is specific to the 1965 Austin 850 and 1965 Austin Mini Cooper, and it is the natural choice for owners who want radial construction on Austin's small 10-inch-wheel cars.
Year(s): 1965|Fit(s): 850, Mini Cooper|Construction: Bias Ply|Rim: 10-in rim
5.20-10 is a numeric bias-ply size in which 5.20 is the nominal section width in inches and 10 is the rim diameter. This size is specific to the 1965 Austin 850 and 1965 Austin Mini Cooper and represents the period-style construction for those compact 10-inch-wheel models. Owners chasing a more original small-car appearance and feel will generally prefer this bias-ply fitment over the radial alternative in the same rim diameter.
Year(s): 1965|Fit(s): A 110|Construction: Bias Ply|Rim: 13-in rim
7.50-13 is a numeric bias-ply size, with 7.50 denoting nominal section width in inches and 13 denoting rim diameter. It is a model-specific fitment for the 1965 Austin A 110 rather than a shared Austin size. Buyers with an A 110 should confirm that model first, since this larger 13-inch bias-ply fitment does not interchange with the smaller radial and bias-ply sizes used on other 1965 Austin cars.
Year(s): 1965|Fit(s): A 40|Construction: Radial|Rim: 13 in
145R13 is a radial metric size with a nominal width of 145 millimeters on a 13-inch rim, conventionally understood as an 80-series radial when no aspect ratio is stated. Michelin and Firestone offer this size in blackwall form, and speed or tube details vary by product; Michelin's version is tubeless and H-rated to 130 mph, while Firestone publishes a load figure of 825 pounds at 44 psi. On a 1965 Austin A 40, this model-specific radial size is the better match for owners who want radial construction without stepping outside the car's intended wheel diameter.
Year(s): 1965|Fit(s): A 40|Construction: Bias Ply|Rim: 13 in
520-13 is a numeric bias-ply size, with 5.20 indicating nominal section width in inches and 13 indicating the rim diameter. Firestone and Premium Sport offer it in blackwall and narrow whitewall styles, with published load figures ranging from 770 pounds at 32 psi to 1,100 pounds at 60 psi. For a 1965 Austin A 40, this is the more traditional bias-ply choice and will appeal to restorers who want an original-style look on a 13-inch wheel.
Year(s): 1965|Fit(s): A 55|Construction: Radial|Rim: 14 in
165R14 is a radial metric size with a nominal section width of 165 millimeters and a 14-inch rim diameter, with the unstated profile conventionally treated as an 80-series radial. Pirelli, Michelin, and Vredestein offer this size in blackwall form, and the available products carry H speed ratings with a 130 mph ceiling; Michelin's version is tubeless, while load figures vary by product and include 1,102 pounds at 51 psi on the Vredestein. On a 1965 Austin A 55, this radial size suits owners who want a later-style touring tire character on the model's 14-inch wheel.
Year(s): 1965|Fit(s): A 55|Construction: Bias Ply|Rim: 14-in rim
5.90-14 is a numeric bias-ply size, with 5.90 indicating nominal section width in inches and 14 indicating the rim diameter. It is a model-specific fitment for the 1965 Austin A 55 and represents the traditional construction alternative to the radial 165R14. Restorers who want a more era-appropriate look and driving feel on an A 55 will typically start here rather than with a radial.
Seven Austin models are covered for 1965, ranging from compact city cars to larger family saloons. Tire size varies by model, and several of those models also present a radial-versus-bias-ply decision within their own fitment range, so identifying the exact model matters before settling on a size. Select your model below to narrow the fitment history and see the products that match it.
1965 Austin 1100
The Austin 1100 was one of the key front-wheel-drive British family cars of the mid-1960s, known for making efficient use of a compact footprint. Its tires mount on 12-inch wheels, with a choice between a radial metric fitment and a traditional numeric bias-ply size depending on how original or how road-oriented you want the car to feel.
The Austin 1800 was a larger, roomy family saloon with a distinctly modern-for-its-time layout and a stronger road-car presence than Austin's smaller offerings. Its fitments mount on 13-inch wheels, and the model can be approached either with a radial size for later-style driving character or a bias-ply size for a more traditional presentation.
The Austin 850 represents the original Mini formula in its simplest and lightest form, built around minimal size and nimble city use. Its tires mount on 10-inch wheels, and owners typically choose between an original-style bias-ply size and a radial alternative that keeps the compact wheel diameter intact.
The Austin A 110 sat in the larger end of Austin's traditional saloon range, carrying a more substantial look and feel than the compact front-wheel-drive cars introduced in the same era. Its tire fitment mounts on 13-inch wheels and uses a bias-ply size rather than the radial-versus-bias split seen on several other 1965 Austin models.
The Austin A 40 was a compact, practical small car that remained popular for its straightforward packaging and familiar British saloon character. Its tires mount on 13-inch wheels, with one radial option and one bias-ply option, so the choice usually comes down to whether the car is being restored to a more original appearance or driven with a more modern tire construction.
The Austin A 55 belongs to Austin's established mid-size saloon family and carries a more traditional pre-BMC-modernization character than the Mini-based cars. Its fitments mount on 14-inch wheels, and owners can either keep the car in a classic bias-ply direction or use a radial size that preserves the same basic wheel diameter.
The Austin Mini Cooper turned the compact Mini platform into a genuine enthusiast car, blending small dimensions with a much sportier reputation. Like the Austin 850, it uses 10-inch wheels, but buyer expectations often differ because some owners prioritize road use while others want a more original small-performance-car presentation.
Fifteen products are available across five tire sizes for 1965 Austin vehicles. 145R12 has 1 Michelin radial blackwall, 650-13 has 4 Coker Classic and US Royal bias-ply whitewall options, 145R10 has 5 Firestone, Kings, Camac, and Dunlop radial blackwalls, 145R13 has 2 Michelin and Firestone radial blackwalls, and 165R14 has 3 Pirelli, Michelin, and Vredestein radial blackwalls. Confirm your size and construction choice first, and note that tube details and speed ratings can vary between products within the same size.
These answers sort out model-specific sizing across the 1965 Austin range, explain when the real choice is bias-ply versus radial, and cover sidewall style, setup, storage, and longer-drive checks for collector British cars.
Size Basics & Fitment
What tire sizes fit 1965 Austin vehicles?
1965 Austin vehicles use 145R12 and 5.50-12 on the Austin 1100, 175R13 and 650-13 on the Austin 1800, 145R10 and 5.20-10 on the Austin 850 and Austin Mini Cooper, 7.50-13 on the Austin A 110, 145R13 and 520-13 on the Austin A 40, and 165R14 and 5.90-14 on the Austin A 55. Rim diameters vary by model, spanning 10, 12, 13, and 14 inches, so there is no single 1965 Austin tire size across the whole make.
That means year and make alone are not enough for an accurate tire choice on a 1965 Austin. Start by identifying the exact model, then verify whether you want the bias-ply size associated with original-era construction or the radial size used on that same model family. Rim width should also be checked against the actual wheel whenever a product publishes a width range.
What does 145R10 mean on a 1965 Austin tire?
On a 1965 Austin, 145R10 is a radial metric size. The 145 refers to nominal section width in millimeters, the R indicates radial construction, and the 10 is the wheel diameter in inches. Because no aspect ratio is printed, this type of Euro-metric sizing is conventionally treated as an 80-series radial, which is typical of many period European applications.
For 1965 Austin fitment, 145R10 applies to the Austin 850 and Austin Mini Cooper, both of which use 10-inch wheels. It should not be confused with 145R12 or 145R13, since the final number is the wheel size and that must match exactly. Once the model is confirmed, you can compare the radial 145R10 against the bias-ply 5.20-10 if your car uses the same 10-inch wheel diameter.
Do all 1965 Austin models use the same tire size?
No, 1965 Austin models do not share one common tire size. The make spans compact cars such as the Austin 850 and Mini Cooper on 10-inch wheels, the Austin 1100 on 12-inch wheels, several 13-inch applications including the Austin 1800, A 110, and A 40, and the Austin A 55 on 14-inch wheels. Several models also have both a radial and a bias-ply size tied to that model's wheel diameter.
That variation matters because a tire that is correct for one 1965 Austin may be completely wrong for another even if the width numbers look similar. If you are unsure, identify the model from the chassis tag, registration, or marque references first, then confirm the wheel diameter on the car itself. That approach avoids mixing small-car Mini fitments with larger saloon sizes from the A-series or 1800 range.
Buying the Right Tire
Should I choose the 145R10 or the 5.20-10 for my 1965 Austin?
For a 1965 Austin 850 or 1965 Austin Mini Cooper, the choice between 145R10 and 5.20-10 is mainly a construction decision. 145R10 is a radial size offered in blackwall form by Firestone, Kings, Camac, and Dunlop, while 5.20-10 is the corresponding bias-ply size for the same 10-inch-wheel models. Both fit the same basic wheel diameter, but they reflect different periods of tire design and different owner priorities.
Choose 5.20-10 when originality, period look, and traditional response are the main goal. Choose 145R10 when you want a radial on the car's correct 10-inch wheel diameter and are less focused on factory-era construction. The final check should always be the actual wheel and the intended use of the car, especially if it is a restored Cooper where appearance expectations can be different from a casually driven Austin 850.
What sidewall styles are available for 1965 Austin tires?
Sidewall style varies considerably across 1965 Austin tire sizes. The radial sizes with current product coverage—145R12, 145R10, 145R13, and 165R14—are blackwall tires. The bias-ply 650-13 is available in both wide whitewall and narrow whitewall form, while 520-13 appears in blackwall and narrow whitewall versions. That mix reflects the fact that Austin's 1965 range spans modest British saloons and small cars, but some replacement bias-ply products also overlap with broader period styling tastes.
For most 1965 Austin restorations, blackwall is the safer visual starting point unless you have specific period evidence for a whitewall-equipped car in your market. Whitewalls can suit certain custom presentations or market-specific tastes, but concours originality usually depends on the exact model, trim, and delivery market. If appearance matters as much as fitment, compare the sidewall style to period photos and marque-club guidance before making the final choice.
What brands make tires for 1965 Austin vehicles?
1965 Austin tire coverage includes Michelin, Coker Classic, US Royal, Firestone, Kings, Camac, Dunlop, Premium Sport, Pirelli, and Vredestein, depending on size. Michelin covers 145R12 and also appears in 145R13 and 165R14, while Firestone appears in 145R10, 145R13, and 520-13. Coker Classic and US Royal cover 650-13, Premium Sport covers 520-13, and Pirelli plus Vredestein appear alongside Michelin in 165R14.
Brand choice should come after model and size are settled, not before. Some sizes have a deep selection and others have only one active product path, so the right question is usually which brands exist within your correct size and construction. Once you narrow that down, compare sidewall style, speed rating, load figure, and rim-width guidance where those details are published for the size you need.
Fitting & Setup
What rim width do 1965 Austin tires require?
Rim-width guidance varies by size on 1965 Austin applications. 145R12 is shown on a 4.5-inch rim, 650-13 fits 4.50 to 5.00-inch rims, 145R13 fits 4.00 to 5.00-inch rims on one product, 520-13 appears on 3.5-inch and 3.50 to 4.00-inch rims depending on product, and 165R14 fits 4.0 to 5.5-inch or 4.50 to 6.00-inch rims depending on brand. Some sizes do not carry published rim-width details in every product version.
Those ranges are useful because they show why two tires with the same wheel diameter are not automatically interchangeable across every wheel. Before committing to a tire, measure or confirm the wheel width on the car and compare it to the product's approved range for that exact size. That step is especially important on restored cars that may no longer wear their original wheels.
Do 1965 Austin tires require inner tubes?
Inner-tube requirements on 1965 Austin tires depend on the exact size and product. Michelin's 145R12 and Michelin's 165R14 are marked TL, which means tubeless, and 145R13 also includes a tubeless Michelin option. Other Austin tire products do not always state tube status in the sidewall marking, so tube use can vary by product rather than following one rule across the whole make.
The wheel matters as much as the tire here, especially on older British cars that may have original-style rims or wheels with tube-era design details. Even when a tire is tubeless by marking, the final decision should account for the condition and type of the wheel it will be mounted on. If your car still uses original wheels, verify tube practice with the wheel specialist or marque expert handling the installation.
Maintenance, Storage & Longevity
How should I store a 1965 Austin when the tires are fitted?
A stored 1965 Austin should be kept away from direct sunlight, electric motors, battery chargers, welding equipment, and other ozone sources that age rubber. Clean, dry floors and stable temperatures help, and the car benefits from being moved periodically so the tires do not sit in one position for months at a time. When both bias-ply and radial options exist for a model, remember that bias-ply tires generally flat-spot more readily during static storage.
For longer off-season storage, many owners either slightly increase pressure within the tire maker's guidance or take some weight off the tires with properly placed stands. The goal is not to hang the suspension unnaturally, but to reduce prolonged stress on the carcass. If your Austin is seldom driven, storage habits have a bigger effect on tire condition than mileage does.
How long do tires on a 1965 Austin typically last?
On a 1965 Austin, tire life is usually judged more by age than by miles driven. A good collector-car rule is to begin evaluating tires carefully once they are around five to seven years old and to treat roughly ten years as a point where replacement deserves serious consideration, even if tread still looks healthy. The DOT date code on the tire sidewall is the reference point for age, not the restoration date of the car.
That approach matters because many older Austins see light seasonal use, which can hide age-related hardening, cracking, or separation until a longer drive exposes it. A tire that looks acceptable in the garage may no longer be the right tire for road use if it has simply aged out. If the age is close to the upper end of that range, a close inspection becomes more important than remaining tread depth.
How often should tires on a 1965 Austin be inspected?
Tires on a 1965 Austin should be inspected before every drive and again before any extended outing. Look for sidewall cracking, cuts, bulges, exposed cord, irregular tread wear, and obvious pressure loss. On cars using tube-type practice or older wheels, valve stems and any signs of air loss around the stem deserve extra attention because small leaks can become major problems during a long run.
A quick visual check in the garage is helpful, but a hand-pressure test is not enough on a light British car. Use an accurate gauge, and compare all four tires plus the spare so the car is not relying on an aged or underinflated backup. Frequent inspections are especially important on collector Austins because they often sit long enough for issues to develop between drives.
Restoration & Authenticity
What tires were originally fitted to the 1965 Austin 1100?
For a 1965 Austin 1100, bias-ply construction is the safest original-era assumption unless you have market-specific evidence showing otherwise, because mid-1960s small family cars were still deeply tied to bias-ply fitment even as radial adoption was growing in Europe. The 1100 uses a 12-inch tire family, with 5.50-12 representing the classic numeric bias-ply format and 145R12 representing the radial alternative within the same model.
If the goal is authenticity, start with the tire construction and sidewall appearance that best matches your car's original market and restoration standard rather than choosing by brand name alone. Original-equipment branding could vary by market and supply, so marque clubs, factory literature, and period photographs remain the best final check. For many owners, getting the size family and construction right is the most important first step.
Does correct tire fitment matter for showing a 1965 Austin?
Correct tire fitment matters on a shown 1965 Austin because judges and knowledgeable enthusiasts often notice size, construction type, and sidewall presentation before they read any detailed placards. A radial on a car being judged for strict originality can stand out just as much as an obviously modern sidewall treatment, while the wrong rim diameter is a more fundamental error. On models with both bias-ply and radial options in current coverage, the bias-ply route usually aligns more closely with period presentation.
The right answer depends on the event standard. A local British car show may be more relaxed than concours judging, but once originality becomes the focus, seemingly small details matter. If your Austin is headed for judged events, compare the tire's size format and sidewall look against period references for that exact model and ask the relevant marque club what they would flag as incorrect.
What is the difference between Michelin XAS and Vredestein Sprint Classic for the 1965 Austin?
For the 1965 Austin A 55 in 165R14, Michelin XAS and Vredestein Sprint Classic are both blackwall radial choices with H speed ratings, which carry a 130 mph ceiling. Michelin marks its tire 165HR14 84H TL and gives a rim-width range of 4.50 to 6.00 inches, while Vredestein marks its tire 165HR14 84H, gives a 4.0 to 5.5-inch rim-width range, and publishes a load figure of 1,102 pounds at 51 psi.
That makes the comparison less about basic fitment class and more about the exact wheel on the car and the type of period character you want from the tread and sidewall presentation. If your Austin A 55 has narrower wheels, the published rim-width window can help narrow the choice quickly. It is also worth comparing visual details, since many restorers care as much about the tire's era-appropriate appearance as its dimensions.
Safety & Road Use
Are 1965 Austin tires safe for highway driving?
1965 Austin tires can be appropriate for highway use when the correct size is fitted, the tires are in sound condition, and the speed rating matches the intended use. Among the radial sizes with published ratings, 145R12 appears with an S rating to 112 mph, 145R10 includes an S-rated Dunlop option to 112 mph, and 145R13 plus 165R14 appear with H-rated options to 130 mph. Bias-ply sizes on these cars should be treated with the normal expectations that come with older-style construction and the driving character of a mid-1960s British car.
In real-world use, the Austin's own braking, suspension, wheel condition, and alignment usually matter as much as the tire's theoretical speed capability. A healthy tire cannot compensate for a car that has not been sorted mechanically for sustained road use. Before a longer highway drive, confirm condition, pressure, age, and balance so the tire choice works as part of a complete roadworthy package.
What inflation pressure should I use for 1965 Austin tires?
Inflation pressure on 1965 Austin tires should begin with the factory vehicle recommendation for the exact model, then be cross-checked against the tire maker's maximum load and pressure marking where one is published. Examples include 650-13 at 1,150 pounds at 32 psi, 520-13 at 770 pounds at 32 psi on one version and 1,100 pounds at 60 psi on another, 145R13 at 825 pounds at 44 psi on one product, and 165R14 at 1,102 pounds at 51 psi on one product.
Those figures are not interchangeable service pressures for every 1965 Austin tire; they are load-and-pressure references for specific products. The correct running pressure depends on the exact car, axle load, and tire design, so avoid copying a number from one size to another just because both are fitted to 1965 Austins. If the owner's manual and the tire's sidewall information point in different directions, use the model-specific application guidance from the tire maker or a qualified installer.
What should I check before taking a 1965 Austin on a longer drive?
Before a longer drive in a 1965 Austin, inspect each tire for cracking, cuts, bulges, irregular wear, and correct inflation, and do not forget the spare. If your tire or wheel setup relies on tube-type practice, add a close look at valve stems and any sign of slow leakage. Tire age also matters on low-use collector cars, so an old-looking but barely worn tire still deserves careful scrutiny.
A tire check is only one part of preparing a 1965 Austin for distance. Wheel bearings, brakes, cooling, steering play, and suspension condition all affect how safely the car uses its tires on the road. Once the mechanical side is sorted, make sure the tire size, construction, and pressure all match the specific Austin model so the car behaves as it should over a longer run.
