The 1965 Simca lineup reflected the practical, space-efficient thinking that made small European cars appealing to American enthusiasts looking for something different from domestic iron. In that year, 1965 Simca centered around the rear-engined Simca 1000, a compact sedan known for light weight, simple engineering, and lively character. Tire choice for 1965 Simca is more nuanced than it first appears, because the model used four sizes across 12-inch and 13-inch fitments, with both bias-ply and radial options depending on the wheel and period of use you want to reflect. Before choosing a tire, confirm whether your car is on 12-inch or 13-inch wheels, then decide whether originality or more modern road manners matters more to you.
Which Tire Size Is Right for Your 1965 Simca
Four tire sizes are used on 1965 Simca vehicles, and all of them apply to the Simca 1000 rather than being split across multiple models. The real decision starts with wheel diameter, since these sizes are divided between 12-inch and 13-inch fitments, and then moves to construction, with both bias-ply and radial choices in the year range. Understanding that distinction before choosing a product saves time and helps you match the tire to the wheels and driving character you want.
Year(s): 1965|Fit(s): 1000|Construction: Radial|Rim: 13 in
145R13 is a metric radial size with a nominal section width of 145 millimeters and a 13-inch rim diameter; in this style of metric sizing, the absent aspect ratio conventionally indicates an 80-series profile. This size is available from Michelin and Firestone in Blackwall form, and the products include tubeless construction, with one Michelin example carrying an H speed rating to 130 mph. For a Simca 1000 running 13-inch wheels, this radial size suits owners who want a later-era European driving feel with road manners that differ from a traditional bias-ply tire.
Year(s): 1965|Fit(s): 1000|Construction: Bias Ply|Rim: 13-in rim
5.50-13 is a numeric bias-ply size in which 5.50 denotes the nominal section width and 13 is the rim diameter in inches. It is specific to Simca 1000 applications using 13-inch wheels and represents the earlier bias-ply sizing convention seen on many compact European cars of the period. This is the right direction for owners focused on preserving a more period-correct look and steering character on a 13-inch Simca 1000.
Year(s): 1965|Fit(s): 1000|Construction: Radial|Rim: 12-in rim
155R12 is a metric radial size with a nominal section width of 155 millimeters and a 12-inch rim diameter; as with other older metric radials of this style, the profile is conventionally treated as an 80-series. It is specific to Simca 1000 applications using 12-inch wheels and reflects a radial alternative for cars fitted with the smaller wheel diameter. For owners confirming a 12-inch setup first, this size points toward a more modern radial construction while staying within an appropriate vintage European size family.
Year(s): 1965|Fit(s): 1000|Construction: Bias Ply|Rim: 12-in rim
5.60-12 is a numeric bias-ply size, with 5.60 indicating the nominal section width and 12 indicating the rim diameter in inches. It is specific to Simca 1000 applications on 12-inch wheels and follows the traditional bias-ply sizing format used before metric radial sizing became common. Owners restoring a Simca 1000 with 12-inch wheels often look to this type of size when visual authenticity and era-correct construction matter more than adopting a radial.
One model is covered for 1965 Simca: the Simca 1000. Because all four tire sizes belong to that single model, identifying the exact wheel diameter on your car matters more than distinguishing between model lines. Select the model below for Simca 1000-specific fitment history and products.
1965 Simca 1000
The 1965 Simca 1000 was a compact rear-engined French sedan with tidy proportions and a strong following among enthusiasts who appreciate small-displacement European cars. Its tire fitment spans both 12-inch and 13-inch wheels, so the first step is verifying which wheel diameter your particular car carries before narrowing the choice to bias-ply or radial construction.
Two products are available across one tire size for 1965 Simca vehicles. In 145R13, Michelin and Firestone offer radial Blackwall choices. Confirm whether your Simca 1000 uses a 12-inch or 13-inch wheel before selecting a construction type.
These answers focus on the 1965 Simca 1000's mix of 12-inch and 13-inch tire fitments, the difference between numeric bias-ply and metric radial sizing, and the practical checks that matter for a lightly used collector car.
Size Basics & Fitment
What tire sizes fit 1965 Simca vehicles?
1965 Simca vehicles in this year range use four sizes, all on the Simca 1000: 145R13, 5.50-13, 155R12, and 5.60-12. The 145R13 and 5.50-13 mount on 13-inch wheels, while the 155R12 and 5.60-12 mount on 12-inch wheels. Firestone's 145R13 radial is designed for 4.00- to 5.00-inch rim widths, which gives a useful reference point for that specific size.
The practical takeaway is that year and make alone are not enough if your Simca 1000 may have changed wheels over time. Start by measuring the wheel diameter on the car, then match the tire size to that wheel before deciding between bias-ply and radial construction. That approach prevents the most common mistake on small European classics: choosing the right-looking size family on the wrong rim diameter.
What does 5.50-13 mean on a 1965 Simca tire?
On a 1965 Simca, 5.50-13 is a numeric bias-ply size. The 5.50 refers to the nominal section width in inches, and the 13 refers to the wheel diameter in inches. Unlike a modern metric radial size, it does not include a millimeter width, an aspect ratio, or an R to identify radial construction.
That matters because a 5.50-13 is not just another way of writing 145R13. The two sizes share a 13-inch wheel diameter, but they come from different sizing systems and different construction eras. If your goal is a period-authentic 1965 Simca look and feel, this kind of numeric bias-ply size is usually where the search begins; if regular road use matters more, many owners compare it to a same-diameter radial alternative.
What does 145R13 mean on a 1965 Simca tire?
On a 1965 Simca, 145R13 is an older metric radial size. The 145 is the nominal section width in millimeters, the R identifies radial construction, and the 13 is the wheel diameter in inches. When no aspect ratio is printed in this older Euro-metric format, it is conventionally treated as an 80-series profile.
That makes 145R13 easy to recognize as a later-style radial format compared with a numeric bias-ply size such as 5.50-13. It still fits a 13-inch wheel, but the construction and sizing language belong to a different tire era. On a 1965 Simca 1000, that distinction is useful when balancing originality against driving preferences, especially on cars that have been kept on the road and updated over time.
Buying the Right Tire
Should I choose the 5.50-13 or the 145R13 for my 1965 Simca?
For a 1965 Simca on 13-inch wheels, the difference between 5.50-13 and 145R13 is mainly construction and period character rather than wheel diameter. The 5.50-13 is a numeric bias-ply size, while the 145R13 is a radial metric size. Among current 145R13 choices, Michelin and Firestone both offer Blackwall radials, and one Michelin version carries an H speed rating.
Choose the bias-ply route if your priority is preserving the more original look and feel associated with mid-1960s fitment practice. Choose the radial route if you want a same-diameter tire family with a more modern construction style for regular driving. The key is not to mix up construction choice with wheel fitment: both are 13-inch sizes, so the first confirmation is that your Simca actually uses 13-inch wheels.
What sidewall styles are available for 1965 Simca tires?
Blackwall styling is available in 145R13 for 1965 Simca applications. That appearance is consistent with the modest, practical presentation expected on many small European sedans of the period, especially compared with the wide-white styling more often associated with American cars from earlier decades.
Sidewall style matters most when you are trying to capture the right visual tone for a restoration. A 1965 Simca 1000 usually looks most natural with a restrained sidewall treatment rather than a decorative one. If appearance is a major part of your decision, compare sidewall style only after you have confirmed the correct wheel diameter and chosen between a bias-ply and radial construction path.
What brands make tires for 1965 Simca vehicles?
Michelin and Firestone both make 145R13 tires for 1965 Simca applications. Michelin is closely tied to the broader history of European radial development, which makes it a familiar name for small Continental cars, while Firestone offers another radial option in the same size family.
Brand choice on a 1965 Simca usually comes after the bigger decisions have been made. First confirm whether your car uses a 12-inch or 13-inch wheel, then decide whether you want a bias-ply or radial construction. Once those two points are settled, comparing brands becomes more meaningful because you are evaluating products within the correct fitment path rather than across different wheel diameters.
Fitting & Setup
What rim width do 1965 Simca tires require?
Rim width guidance is available for the 145R13 used on 1965 Simca applications. In that size, a Firestone radial fits rims from 4.00 to 5.00 inches wide. The year range also includes 12-inch and 13-inch tire sizes, so rim diameter still has to be confirmed before rim width becomes the next step.
Use rim width information as a compatibility check, not as a substitute for identifying the tire size first. A correct-width rim with the wrong diameter still will not work, and a wheel that has been changed during the car's life can shift the right answer from one size family to another. On a Simca 1000, measuring the wheel and then checking the tire maker's approved width range is the safest sequence.
Do 1965 Simca tires require inner tubes?
Tube status can be confirmed for 145R13 on 1965 Simca applications, and the available examples in that size are tubeless. The Michelin 145HR13 carries a TL marking, which identifies tubeless construction. Other year-correct sizes on the Simca 1000 should be checked by product marking rather than assumed from the size code alone.
That matters because many vintage-car owners understandably associate older fitments with inner tubes, but the tire's actual sidewall marking is the detail that decides it. If your car still uses original-style wheels, also inspect the wheel condition and valve stem area before final installation. A clean, sound wheel is just as important as the tube or tubeless designation when setting up a small European classic for regular use.
Maintenance, Storage & Longevity
How should I store a 1965 Simca when the tires are fitted?
A 1965 Simca should be stored in a cool, dry, dark space with the tires protected from sunlight, electric motors, battery chargers, furnaces, and other ozone sources that accelerate rubber aging. Keep the tires properly inflated during storage and move the car periodically if it will sit for long stretches. Bias-ply tires generally develop flat spotting more readily than radials during static storage.
That means storage practice should reflect the construction you chose. A Simca 1000 on bias-ply tires benefits from occasional rolling or support that reduces long-term load in one contact patch, while a car on radials still needs protection from light and ozone even if flat spotting is less dramatic. Good storage habits preserve ride quality, appearance, and casing condition long before tread wear becomes the issue.
How long do tires on a 1965 Simca typically last?
On a 1965 Simca, tire life is usually judged more by age than by mileage, because collector cars often cover relatively few miles. A sensible rule is to begin evaluating tires closely at about five to seven years of age and to treat roughly ten years as a serious replacement point regardless of remaining tread. The DOT date code on the sidewall is the starting point for that timeline.
A lightly driven Simca 1000 can look fine at a glance while the rubber has already hardened or started to crack. That is especially important on older-style tires that may spend long periods parked between drives. Tread depth alone is not a reliable guide on a hobby car, so pair the age check with a close inspection of sidewalls, bead area, and the way the tire holds pressure over time.
How often should tires on a 1965 Simca be inspected?
Tires on a 1965 Simca should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, uneven wear, and any change in how the tire holds air. If the car uses a tube-type setup in one of its vintage sizes, include the valve stem and any signs of tube-related leakage in that inspection routine.
Frequent inspection matters because small, light classics can spend weeks sitting and then be asked to run at road speed with little warning. Catching a weathered sidewall or a pressure loss at home is far better than discovering it after the car warms up on the road. Make tire inspection part of the same pre-drive habit as checking fluids, lights, and basic brake feel.
Restoration & Authenticity
What tires were originally fitted to the 1965 Simca Simca 1000?
For a 1965 Simca Simca 1000, bias-ply construction is the historically correct starting point for an originality-minded restoration, and the period size families here include 5.50-13 and 5.60-12. Radial sizes such as 145R13 and 155R12 reflect the later metric radial format that also appears in this year and make range. Original-equipment branding should be confirmed through factory literature or marque specialists before a concours-level decision is made.
That means the right answer depends partly on how exact your restoration needs to be and which wheels are actually on the car. A driver-quality Simca may reasonably follow the correct size family and construction style without chasing every market-specific detail, while a show car should have its fitment checked against brochures, surviving cars, and club knowledge. The strongest starting point is matching wheel diameter first, then choosing the era-appropriate construction.
Does correct tire fitment matter for showing a 1965 Simca?
Correct tire fitment does matter when a 1965 Simca is judged for authenticity. Size family, construction type, and sidewall appearance all influence whether the car presents as period-correct. A modern radial can look out of place on a restoration judged to factory standards if the car would have originally worn a bias-ply size in that market and trim configuration.
Even outside formal concours judging, tire choice strongly affects the overall impression of a small European sedan. The Simca 1000 has a light, tidy design, so an obviously later tire style can change the visual balance of the car. Before finalizing a show-focused setup, compare your chosen size and sidewall treatment with period photos and ask a Simca club or marque specialist what local judging standards tend to emphasize.
What is the difference between Michelin XAS-FF and Firestone F560 Radial for the 1965 Simca?
For a 1965 Simca in 145R13, Michelin XAS-FF and Firestone F560 Radial are both Blackwall radial choices, but they are not identical. The Michelin example uses a 145HR13 74H TL marking, which adds an H speed rating to 130 mph, while the Firestone is marked 145R13 and carries a maximum load of 825 pounds at 44 psi. The Firestone also specifies a 4.00- to 5.00-inch rim width range.
Those differences make the comparison less about simple brand preference and more about the exact specification you want on the car. One buyer may care most about a European-style speed-rated marking, while another may focus on load-and-pressure information or matching the tire to a known wheel width. On a Simca 1000, either way, the comparison only matters after you have confirmed that 145R13 is the correct 13-inch radial path for your car.
Safety & Road Use
Are 1965 Simca tires safe for highway driving?
1965 Simca tires can be appropriate for highway driving when the size, condition, and construction match the car and the intended use. In 145R13, available radial examples include a Michelin 145HR13 with an H speed rating, which corresponds to a 130 mph ceiling. In real use, the mechanical limits of a mid-1960s Simca 1000 and the condition of its suspension, brakes, and steering are usually more important than the tire's theoretical top-speed capability.
The safer way to think about highway use is overall readiness, not just speed rating. A sound radial in the correct size may offer a different on-road feel than a bias-ply tire, but neither construction can compensate for aged components or poor alignment. Before regular highway driving, inspect the tires carefully, confirm the wheels are correct for the size you chose, and make sure the rest of the chassis is ready for sustained road speeds.
What inflation pressure should I use for 1965 Simca tires?
Inflation pressure for 1965 Simca tires should follow the vehicle manufacturer's recommendation for the car and the tire maker's limits for the specific tire size you choose. In 145R13, one Firestone radial carries a maximum load of 825 pounds at 44 psi, but that figure is a maximum-rated value rather than a blanket operating pressure for every Simca 1000. Pressure should never be copied from one size family to another without verification.
Use the owner's manual or factory tire-pressure placard as your baseline, then compare it with the tire's sidewall information and the manufacturer's guidance for that product. That is especially important on a car like the Simca 1000, where wheel diameter and construction can vary within the same year and model. Correct pressure affects handling, wear, and ride quality, and overinflating to the sidewall maximum can make a light car drive poorly.
What should I check before taking a 1965 Simca on a longer drive?
Before a longer drive in a 1965 Simca, inspect each tire for visible cracking, cuts, bulges, punctures, uneven tread wear, and any sign of bead damage. Check inflation pressure cold, verify that the spare is usable, and make sure valve stems are sound. If your chosen vintage setup uses inner tubes, include a close look at pressure retention and stem condition before leaving.
Tires are only one part of a proper pre-drive routine on a rear-engined 1960s economy car. It also makes sense to review brake feel, steering play, wheel-bearing noise, lights, and fluid levels before committing to distance. A Simca 1000 that feels fine on a short local trip can reveal weaknesses once heat builds in the tires and chassis, so a careful walk-around and short test drive are worthwhile before the main outing.
