1957 Simca Tire Fitment Guide

1957 Simca vehicles in this fitment group use two tire sizes, and both apply to the 1957 Simca Aronde: 155R14 and 560-14. Both sizes mount on 14-inch rims, but they differ in construction. The 155R14 is a radial size, while the 560-14 is a bias-ply size. Rim width guidance is also different between the two, with 155R14 products shown for 4.00 to 5.50-inch rims and 560-14 products shown for 3.50 to 4.00-inch rims.

That means a 1957 Simca owner should confirm more than just the year and make before choosing a tire. Start by checking whether the car still wears the wheel width appropriate to the size you want to run, then decide whether your priority is factory-era presentation or a more radial-style driving experience. Since both sizes are used on the Aronde, the decision usually comes down to the car's restoration goals and how it will be driven.

On a 1957 Simca, 560-14 is a numeric bias-ply tire size. The 560 portion is the nominal section width expressed in the older numeric system, and the 14 indicates the wheel diameter in inches. This format belongs to the bias-ply era and is the traditional fitment style represented here for the Simca Aronde. Available versions include blackwall, narrow whitewall, and wide whitewall variations in the same basic size.

For a buyer, 560-14 usually points toward a restoration-minded choice rather than a modernized one. It preserves the look and steering feel associated with 1950s tire construction, and it also fits the narrower rim-width range shown for this size. If your Aronde is being returned to a more original visual character, or if whitewall treatment matters to the finished look, this is the size family to consider first.

On a 1957 Simca, 155R14 is a metric radial size. The 155 refers to nominal section width in millimeters, the R identifies radial construction, and the 14 is the rim diameter in inches. In this style of older metric notation, the absence of a stated aspect ratio conventionally corresponds to an 80-series radial. This makes it a distinctly different type of tire from the 560-14 bias-ply option, even though both fit a 14-inch wheel.

That difference matters because the code is telling you more than just dimensions. It also signals a different driving character and a different wheel-width range than the narrower bias-ply option. If your 1957 Simca Aronde is driven regularly and you want a radial-format tire that still suits the car's size and era, 155R14 is the size to evaluate against your actual wheel width and the sidewall markings on the specific product you choose.

Within this year-and-make fitment group, the 1957 Simca Aronde is the model represented, and it uses both available sizes: 155R14 and 560-14. So there is no split here between different Simca model lines for this page. Instead, the same model can be fitted with either a radial or a bias-ply size, both built around a 14-inch rim diameter.

That gives the 1957 Simca buyer a simpler starting point, but not a simpler final decision. You still need to verify which wheels are on the car now, especially if it has been restored or modified over the years. Once wheel width is confirmed, the more important question becomes whether you want a radial-format driving experience or a more original-looking and feeling bias-ply setup.

For a 1957 Simca Aronde, the choice between 155R14 and 560-14 is primarily a choice between radial and bias-ply construction. The 155R14 radial keeps the correct 14-inch rim diameter while using a metric radial format more associated with later driving behavior. The 560-14 bias-ply keeps the earlier construction style and the visual character many owners want on a period-correct restoration. Both sizes fit the Aronde, but they do not ask the same thing of the wheel width.

Owners focused on presentation, period feel, or whitewall styling will usually gravitate toward 560-14, while owners planning more regular road use often look first at 155R14. Neither choice should be made by appearance alone. Confirm the wheel width on the car, then decide whether authenticity or a more radial-style road manner matters more to how you use your 1957 Simca.

Sidewall choices for 1957 Simca tires vary by size. The 155R14 radial products are offered in blackwall form, while the 560-14 bias-ply products are available as blackwall, narrow whitewall, and wide whitewall versions. That gives the Aronde owner a broader appearance range in the bias-ply size than in the radial size. The sidewall style you choose has a strong effect on how formal, sporty, or factory-era the finished car looks.

For most 1950s European small cars, blackwalls are the most broadly authentic visual direction, especially if the goal is a restrained original look. Whitewalls can still be appealing on a restored car, but they should be chosen with an eye toward the market style and the presentation you want. If authenticity matters for judging or marque correctness, match sidewall treatment to the car's intended finished look rather than choosing solely by personal preference.

Three brands cover the available 1957 Simca sizes here. Michelin and Firestone both offer the 155R14 radial, while BFGoodrich covers the 560-14 bias-ply size. That means brand choice is partly tied to the size and construction you want, not just the name on the sidewall. The two radial offerings stay within blackwall presentation, while the BFGoodrich bias-ply line includes multiple whitewall treatments as well as blackwall.

A practical way to narrow the choice is to decide on size and construction first, then compare the products available within that size. If you are leaning radial, Michelin and Firestone are the names to study. If your goal is a classic bias-ply look for the Aronde, BFGoodrich is the relevant path, especially when sidewall appearance is part of the restoration plan.

Rim width guidance for 1957 Simca tires differs by size. The 155R14 radial is shown with a 4.00 to 5.50-inch rim width range, while the 560-14 bias-ply is shown with a 3.50 to 4.00-inch rim width range. Both sizes share a 14-inch rim diameter, but they are not aimed at the same wheel-width window. That makes wheel width one of the most important checks before choosing between the two.

If your Aronde still wears its original-style narrow wheels, that often points naturally toward the 560-14 bias-ply range. If the car has later replacement wheels or wheel measurements that land within the wider radial range, 155R14 may be the more suitable fit. Measure the actual wheel rather than relying on assumptions, because restorations done decades ago often changed wheels without leaving obvious clues.

Inner-tube requirements for 1957 Simca tires depend on the specific product and size. Within 155R14, tube status varies by product because one radial is explicitly marked TL, while the other does not carry the same marking in its size description. The 560-14 bias-ply listings are not marked TL in the size field, so they should be treated with care and matched to the wheel and tire manufacturer's guidance before installation.

The important point is not to assume that every tire in the same size handles tubes the same way. Tube decisions involve both the tire and the wheel, especially on a vintage car with original or older restored rims. Before fitting a 1957 Simca tire, check the sidewall marking on the exact product chosen and make sure the wheel condition and valve setup are appropriate for that installation method.

Original 1957 Simca wheels can potentially accept both listed tire sizes in terms of rim diameter, because both 155R14 and 560-14 are 14-inch tires. The limiting factor is wheel width, not diameter. The radial 155R14 is shown for 4.00 to 5.50-inch rims, while the bias-ply 560-14 is shown for 3.50 to 4.00-inch rims. A wheel that is correct for one size may sit at the edge of, or outside, the recommended range for the other.

That is why wheel measurement should come before tire selection on a 1957 Simca Aronde. If the car remains on narrow original-style wheels, bias-ply fitment is often the more natural match. If the wheels have changed over the years, the radial may become the more practical option. Treat diameter compatibility as only the first checkpoint, then verify the actual width stamped on the wheel or measured directly.

A 1957 Simca should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone sources that age rubber prematurely. Keep the tires properly inflated and move the car periodically so the same contact patch is not loaded for months at a time. Bias-ply tires like the 560-14 are especially prone to temporary flat-spotting during long static storage, while both bias-ply and radial tires can suffer sidewall aging if the environment is harsh.

For longer layups, many collectors either roll the car occasionally or support it in a way that reduces constant load without leaving the suspension hanging unnaturally. Tire covers help if the storage area has light exposure. The goal is to protect the casing as much as the paint and upholstery, because a beautifully restored 1957 Simca still depends on healthy rubber for safe, predictable road use.

On a 1957 Simca, tire age matters more than mileage because collector cars often accumulate very few miles each year. A sensible rule is to evaluate tires closely once they are around five to seven years old and to treat about ten years as the point where replacement deserves serious consideration regardless of tread depth. The DOT date code on the tire is the starting point for that timeline, and visible cracking, hardening, or repeated air loss can shorten it.

That approach applies whether your Aronde wears radial 155R14 tires or bias-ply 560-14 tires. A tire can look presentable on a garage-kept car and still be aged out internally. If the age is unclear, or if the car is returning to the road after long storage, replacing old tires is often one of the smartest first steps before putting real miles on a 1957 Simca.

Tires on a 1957 Simca should be inspected before every drive, with a more thorough check before any extended outing. Look for sidewall cracking, cuts, bulges, uneven wear, embedded debris, and signs of air loss. Pressure should be checked regularly, not just visually, because an underinflated vintage tire can still appear normal at a glance. If your installation uses tubes, valve stems and stem areas deserve the same attention as the tread and sidewalls.

A short local drive may not expose a marginal tire the way a longer trip will. Before taking an Aronde farther from home, inspect all four road tires and the spare, since collector-car spares are often the oldest tire on the vehicle. Frequent inspection is especially important on lightly used classics because age-related issues tend to appear before wear-related ones.

For a 1957 Simca Aronde, bias-ply construction is the most historically typical starting point when thinking about original-period fitment. The available 560-14 size reflects that era-correct bias-ply approach, while 155R14 represents a radial format that became strongly associated with European passenger-car development. No original-equipment brand should be assumed without checking period literature for the exact market and specification of the car.

If your goal is faithful restoration, start with the correct size family and construction type before worrying about finer presentation details. Then confirm sidewall treatment and market-specific expectations through Simca club resources, factory literature, or marque specialists. That extra step matters because a 1957 Simca sold new in one market may not have been presented exactly the same way as a car delivered elsewhere.

Correct tire fitment does matter when a 1957 Simca is judged for originality. Size, construction type, and sidewall appearance all influence whether the car reads as period-correct. On a car judged to factory-era standards, a modern-looking radial or an overly stylized sidewall treatment can stand out just as quickly as an incorrect paint detail. The closer the judging is to authenticity, the more these details count.

For most restoration-focused Arondes, the safest path is to match the tire's construction and sidewall style to the look the car would reasonably have carried in its original market and trim context. Event standards vary, so local or national Simca and French-car groups are the best place to confirm what a particular judge or class expects. Tire choice is part of the car's presentation, not just its drivability.

Both Michelin X and Firestone F560 cover the 155R14 radial fitment for the 1957 Simca, and both are blackwall radial tires for 14-inch rims. The Michelin listing is marked 155R14 80T TL, giving it a T speed rating up to 118 mph and explicit tubeless marking. The Firestone F560 is also described as an 80-series metric radial and includes a 4.00 to 5.50-inch rim width range plus a 990-pound maximum load at 44 psi, but its size field does not carry the same TL or speed-letter notation.

That means the difference is not simply brand name. The Michelin listing gives clearer sidewall marking detail for tube status and speed symbol, while the Firestone listing gives fuller wheel-width and load information. A 1957 Simca owner comparing the two should check the exact wheel width on the car and verify the sidewall marking on the specific tire before installation, especially if tubeless use is part of the plan.

1957 Simca tires can be suitable for highway driving when the size, construction, age, and condition are appropriate for the car and its use. In the available radial choices, one 155R14 product carries a T speed rating, which corresponds to 118 mph. The 560-14 bias-ply products do not show a speed symbol in the available markings here, so they should be treated in line with the more conservative expectations typical of period-style bias-ply motoring. On a car like the Aronde, the vehicle's own vintage braking, suspension, and overall mechanical condition are just as important as the tire itself.

The practical takeaway is to match road use to the whole package, not just the speed letter on one product. A healthy, properly sorted 1957 Simca on fresh tires is a very different proposition from a long-stored car on old rubber. Before sustained highway use, confirm tire age, inflation, wheel condition, and alignment, and make sure the rest of the car is equally ready for modern traffic.

Inflation pressure for 1957 Simca tires should begin with the vehicle's factory recommendation, then be checked against the tire manufacturer's rated pressure information for the exact size and product. In the available products here, the 560-14 bias-ply carries a maximum load of 906 pounds at 30 psi, while one 155R14 radial listing shows a maximum load of 990 pounds at 44 psi. Those figures are load-and-pressure ratings for the tire itself, not a blanket instruction to inflate every Simca tire to the same pressure.

That distinction matters because radial and bias-ply tires behave differently, and the correct operating pressure on a light 1950s car may be well below the tire's maximum-rated pressure. Use the owner's manual or marque guidance as your baseline, then confirm that your chosen tire is being used within its rated limits. Never transfer the pressure figure from a 155R14 radial to a 560-14 bias-ply, or the other way around.

Before taking a 1957 Simca on a longer drive, inspect each tire for cracks, cuts, bulges, tread separation signs, and uneven wear, then verify pressures with an accurate gauge. Check the valve stems, and if your setup uses tubes, pay close attention to any signs of slow leakage or stem distress. The spare should also be inspected and inflated, because on a collector car it may be older than the four road tires and easy to overlook.

A good pre-drive routine goes beyond the tires, but the tires are where roadworthiness meets every other system on the car. Even a well-restored Aronde can feel unsettled if the rubber is aged, mismatched, or incorrectly inflated. If the trip will involve sustained speed or distance, give the car a broader mechanical check as well, including brakes, steering, suspension, and wheel fastener security.