1959 Fairthorpe Atomota Tires

The 1959 Fairthorpe Atomota uses two primary tire sizes: 520-13 in bias-ply construction and 145R13 in radial construction. Both sizes are associated with the Atomota Base and both use a 13-inch rim, so the fitment question is less about wheel diameter and more about which construction and tire style best match the car.

That makes it important to look at the car’s current setup before choosing. A car already running bias-ply tires may be restoration-oriented, while one set up for radials may point you toward 145R13. Wheel width, suspension condition, and clearance around the fenders and steering should be checked before settling on either size path.

The 1959 Fairthorpe Atomota uses a 13-inch rim with both of its primary tire sizes. That applies whether the car is fitted with the 520-13 bias-ply size or the 145R13 radial size, so the rim diameter remains the same across the covered fitments.

Rim diameter is only part of the fitment picture, though. The wheel’s actual width still matters, especially when comparing a vintage bias-ply setup with a radial alternative. Measuring the wheel and checking its condition helps avoid choosing a tire that is correct in diameter but mismatched to the wheel or the car’s available clearance.

The 1959 Fairthorpe Atomota Base uses the same two primary tire-size routes as the model core: 520-13 in bias-ply construction and 145R13 in radial construction. That means the Base does not introduce a separate wheel diameter or a unique size that changes the overall tire-selection path.

The practical decision is choosing which of those two approaches suits the car. A buyer looking for a more traditional presentation may focus on 520-13, while someone leaning toward radial construction may look at 145R13. Confirming the actual wheels on the car remains worthwhile, especially if the car has been updated over the years.

520-13 is the bias-ply tire size used on the 1959 Fairthorpe Atomota. It is a vintage numeric bias-ply format, and it represents the more traditional construction choice for this car compared with the 145R13 radial alternative also used on the same 13-inch rim diameter.

Choosing 520-13 usually means placing more emphasis on period-style appearance and traditional construction. That does not automatically make it the right answer for every Atomota, because some cars are used more regularly on modern roads or have already been set up around radial tires. Wheel width and overall setup should be reviewed before making a change.

Radial equivalents for 520-13 include 155R13, P155/75R13, and P155/70R13. In that group, 155R13 is the 80-series metric radial equivalent, P155/75R13 is the P-metric 75-series equivalent, and P155/70R13 is the P-metric 70-series equivalent for owners considering a radial-format alternative.

Those sizes give you more than one radial profile to evaluate, but none should be treated as automatic interchangeability. A recommended rim-width range of 4 to 5 inches applies to the equivalent path, and the car should still be checked for wheel compatibility, overall dimensions, and steering or fender clearance before moving away from 520-13.

Start by confirming the wheel diameter and actual wheel width, then compare the radial size you are considering against the car’s current tire setup. For a 520-13 bias-ply conversion, the radial-equivalent choices are 155R13, P155/75R13, and P155/70R13, each of which should be evaluated as an alternative rather than assumed to be interchangeable.

The car should also be inspected for suspension wear, steering travel, and available clearance at the fenders and chassis. On a lightweight specialty car like the Atomota, small changes can be noticeable. A careful check of wheel condition, tire age, and the intended use of the car helps determine whether the conversion makes sense for the setup you have.

Start with the role the tire needs to play on the car. A 520-13 tire for a 1959 Fairthorpe Atomota keeps you in the model’s bias-ply size path, and available choices vary by sidewall treatment, tire series, rim-width specification, weight, and in some cases load capacity at a stated pressure.

That means selection is about more than just finding any 520-13. Firestone and Premium Sport options present the car differently, especially when comparing blackwall, narrow whitewall, and wide whitewall versions. Matching the tire to the wheel, the look of the car, and how the Atomota will actually be driven leads to a more suitable choice.

The 1959 Fairthorpe Atomota has several sidewall styles available across its two fitment paths. The 145R13 radial options are blackwall, while the 520-13 bias-ply options include blackwall, narrow whitewall, and wide whitewall versions depending on the tire series and brand you choose.

Sidewall style has a strong effect on the finished look of a small British sports car, especially one with simple body lines. A blackwall usually gives the car a more restrained presentation, while whitewall options push it toward a more stylized or restoration-minded appearance. The best choice depends on the character you want the car to project.

Tires for the 1959 Fairthorpe Atomota are available from Michelin, Firestone, and Premium Sport. Michelin and Firestone appear in the 145R13 radial size, while Firestone and Premium Sport offer 520-13 bias-ply choices, giving the Atomota a mix of traditional and radial-oriented brand options.

Brand is only one part of the comparison. The more useful next step is to look at which size each brand supports, then compare tire series, sidewall appearance, and wheel compatibility details. That keeps the decision focused on the setup of the actual car instead of assuming every brand option serves the same purpose.

For a period-style 1959 Fairthorpe Atomota, the 520-13 bias-ply size is the natural starting point because it preserves the model’s vintage numeric sizing format and traditional construction. Within that size, blackwall, narrow whitewall, and wide whitewall versions create noticeably different visual effects without moving away from the bias-ply presentation.

The right choice depends on how closely the car is being restored and what visual character suits it. If exact originality matters, marque references, period photos, and vehicle-specific history are worth reviewing before selecting a sidewall treatment. For many owners, the goal is simply a convincing period-style look that works with the car’s overall finish.

Tire construction changes the visual character of a restored 1959 Fairthorpe Atomota more than many owners expect. A 520-13 bias-ply tire keeps the car in a distinctly vintage sizing and profile family, while a 145R13 radial gives the car a more modern tire format even though it still fits a 13-inch rim.

That difference matters because restoration is not only about whether a tire mounts on the wheel. Sidewall shape, overall presentation, and the availability of blackwall or whitewall treatments all influence how authentic or updated the car feels. Choosing between bias-ply and radial often sets the tone for the entire restoration’s finished look.

Yes, modifications can affect tire fitment on a 1959 Fairthorpe Atomota even when the tire size itself is correct. Changes such as aftermarket wheels, altered wheel width, suspension updates, ride-height changes, or body repairs can all influence how a 520-13 or 145R13 tire sits within the car’s available space.

That is why the actual car should be checked rather than relying only on nominal size. Steering clearance, fender clearance, and wheel condition all matter, especially on a compact specialty car. Any Atomota that has been changed from stock-like wheel or suspension dimensions deserves an extra fitment review before new tires go into service.

Inspect the wheels first, then check tire pressure, valve stems, and overall clearance once the tires are mounted. On a 1959 Fairthorpe Atomota, it also makes sense to verify that the tires do not contact suspension parts, fenders, or steering components through the full range of movement and normal vehicle loading.

A collector car should also be reviewed beyond the tires themselves before road use. Look for cracked or damaged wheels, loose fasteners, alignment issues, and signs of suspension wear that could affect how the tire performs. A short local test drive followed by a second inspection helps catch rubbing, air loss, or seating problems early.

Collector-car tire maintenance starts with regular visual inspection and proper inflation. Whether the 1959 Fairthorpe Atomota is running 520-13 bias-ply tires or 145R13 radials, the tires should be checked for cracking, cuts, bulges, uneven wear, and any loss of pressure before the car is driven after storage.

Storage conditions matter just as much as mileage on a low-use car. Keeping the Atomota away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the tires over time. Even a car that sees limited road use benefits from periodic pressure checks and close inspection, because age and storage can matter as much as tread depth.