The 1963 Simca 1000 belongs to the era when small European rear-engine cars brought compact packaging and efficient road manners to everyday motoring. Its tire selection is more involved than a single modern replacement because fitment differs by sub-model, with the Bertone Coupe using 13-inch tires and the Series using 12-inch tires, and each configuration appearing in both radial and bias-ply sizing. That makes the real decision less about brand alone and more about confirming the exact model, wheel diameter, and whether a period-style bias-ply presentation or a radial setup better suits the car. For restoration-minded owners, appearance and wheel compatibility both deserve a close look before ordering.
Which Tire Size Is Right for The 1963 Simca 1000
The 1963 Simca 1000 uses four primary tire sizes across two sub-models, and the first step is confirming whether the car is a Bertone Coupe or a Series model. Wheel diameter matters just as much, because the fitments span both 13-inch and 12-inch rims, with radial and bias-ply options tied to each sub-model's setup.
145R13 is a Euro-metric radial size, meaning the tire is approximately 145 millimeters wide, uses radial construction, and fits a 13-inch wheel. On the 1963 Simca 1000, this size applies to the Bertone Coupe and gives that sub-model a radial-format fitment on its 13-inch rim. Available choices in this size include Michelin and Firestone blackwall radials, including the Michelin XAS-FF and Firestone F560 Radial series. This size is the one to evaluate when the car retains the Coupe's 13-inch wheel setup and the goal is a road-friendly radial tire in the proper format.
5.50-13 is a numeric bias-ply size in which the first number refers to nominal section width in inches and the final number identifies a 13-inch rim. For the 1963 Simca 1000, this is the bias-ply fitment associated with the Bertone Coupe, making it relevant for owners who want to stay with a traditional construction type. Numeric bias-ply sizing also carries the period look many restoration-oriented buyers prefer on small European cars of this era. It is the size to consider after confirming that the car is the Coupe and that the wheel is the correct 13-inch diameter.
155R12 is a Euro-metric radial size that uses a nominal 155-millimeter width with radial construction on a 12-inch wheel. On the 1963 Simca 1000, this radial fitment belongs to the Series model rather than the Bertone Coupe, so sub-model identification is essential before selecting it. The larger nominal section width compared with the 13-inch Coupe radial does not make it a substitute for the other setup, because the wheel diameter is different. This size deserves consideration when the car is a Series model still using its proper 12-inch wheel arrangement and a radial tire is desired.
5.60-12 is a numeric bias-ply size, with the leading number indicating nominal section width in inches and the final number indicating a 12-inch rim. For the 1963 Simca 1000, this is the bias-ply fitment used on the Series model, making it the traditional-construction counterpart to the 155R12 radial. Buyers looking for a more period-style tire presentation often focus on this kind of sizing and construction when preserving an earlier driving feel and visual character. It should be considered only after confirming that the car is a Series model with the correct 12-inch wheels in place.
Sub-model fitment matters on the 1963 Simca 1000 because the covered versions do not share the same wheel diameter or tire sizes. Identifying whether the car is a Bertone Coupe or a Series model is the key first step before comparing bias-ply and radial options.
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1963 Simca 1000 Bertone Coupe
The 1963 Simca 1000 Bertone Coupe uses the 13-inch fitment family, with both a radial and a bias-ply option tied to that setup. That makes wheel-diameter confirmation especially important, followed by a choice between a more traditional bias-ply presentation and a radial tire for regular road use.
The 1963 Simca 1000 Series uses the 12-inch fitment family rather than the Coupe's 13-inch setup, and it also appears in both radial and bias-ply sizing. Tire selection here starts with verifying the correct 12-inch wheels, then deciding whether originality of construction or radial road manners is the stronger priority.
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 1963 Simca 1000 Tires for Sale
Current 145R13 choices for the 1963 Simca 1000 center on blackwall radial options from Michelin and Firestone. The available products differ by tire series, construction details, weight, and rim-width specification, giving Bertone Coupe owners a useful comparison within the correct 13-inch radial size.
These FAQs focus on the fitment questions that matter most for a 1963 Simca 1000, including sub-model tire size differences, 12-inch versus 13-inch wheels, bias-ply and radial choices, product selection, and pre-drive inspection on a collector-era compact.
Tire Size & Fitment
What tire size fits a 1963 Simca 1000?
A 1963 Simca 1000 does not use just one tire size across every version. The Bertone Coupe uses 145R13 in radial form or 5.50-13 in bias-ply form, while the Series uses 155R12 in radial form or 5.60-12 in bias-ply form.
That means the first decision is identifying the exact sub-model and then confirming whether the car has 12-inch or 13-inch wheels. Once that is settled, the next choice is whether to keep a traditional bias-ply style or move to the radial size associated with that same sub-model's wheel setup.
What size rim does a 1963 Simca 1000 use?
The 1963 Simca 1000 uses either a 13-inch rim or a 12-inch rim, depending on the sub-model. The Bertone Coupe is tied to the 13-inch fitment family, and the Series is tied to the 12-inch fitment family.
Rim diameter should be confirmed before comparing tire choices, because a 12-inch tire and a 13-inch tire are not interchangeable. It is also smart to inspect the actual wheels on the car, since older vehicles are sometimes changed over the years and may no longer carry the wheel diameter associated with their original sub-model.
Do all 1963 Simca 1000 sub-models use the same tire size?
No, the covered 1963 Simca 1000 sub-models do not share the same tire size. The Bertone Coupe uses 145R13 or 5.50-13, while the Series uses 155R12 or 5.60-12, so the fitment changes with the sub-model.
This difference matters because the car may require either a 13-inch or 12-inch tire, and the radial and bias-ply options stay within each sub-model's own wheel family. Checking the exact model badge, wheel diameter, and current wheel setup will prevent ordering a tire that is correct for a Simca 1000, but not for that particular version.
Bias-Ply & Radial Options
Should I use bias-ply or radial tires on a 1963 Simca 1000?
Both constructions are relevant to the 1963 Simca 1000, but they follow the sub-model's wheel and size family. The Bertone Coupe pairs 145R13 as a radial option with 5.50-13 as a bias-ply option, while the Series pairs 155R12 as a radial option with 5.60-12 as a bias-ply option.
The choice usually comes down to how the car will be used and how period-oriented the finished appearance needs to be. A bias-ply selection preserves a more traditional construction style, while a radial may suit regular road driving, but wheel diameter, wheel width, and overall clearance still need to be checked before changing setups.
Is 5.50-13 a bias-ply or radial tire for the 1963 Simca 1000?
5.50-13 is a bias-ply tire size for the 1963 Simca 1000 Bertone Coupe. It is the traditional numeric bias-ply format associated with the Coupe's 13-inch wheel setup, while the radial alternative in that sub-model family is 145R13.
That matters because the two sizes represent different construction types even though they belong to the same sub-model's wheel diameter. Anyone considering a switch between them should verify the actual wheel dimensions on the car and make sure the intended tire choice suits the vehicle's current stance, clearance, and restoration goals.
What should I check before converting my 1963 Simca 1000 from bias-ply to radial tires?
Start by matching the radial choice to the correct sub-model and wheel diameter. For a Bertone Coupe, that means evaluating 145R13 on a 13-inch wheel, while a Series model uses 155R12 on a 12-inch wheel rather than simply moving to any radial that seems close in size.
Wheel width, tire clearance, suspension condition, and the car's current wheel setup all deserve inspection before making the change. A Simca that has had replacement wheels, suspension work, or body alterations may need closer measurement, especially on a compact rear-engine car where small fitment changes can become noticeable in steering and fender space.
Choosing the Right Tire
What should I consider when choosing a 145R13 tire for a 1963 Simca 1000?
A 145R13 tire is the radial fitment for the 1963 Simca 1000 Bertone Coupe, so the first consideration is confirming that the car is the Coupe and still uses 13-inch wheels. After that, compare the available radial products by brand, tire series, sidewall style, and wheel-compatibility details.
Michelin and Firestone both offer blackwall 145R13 options, but the series and specifications are not identical. Looking at rim-width requirements, load information where available, and overall intended use will help narrow the choice, especially if the car is driven regularly rather than kept strictly for display or occasional local outings.
What sidewall styles are available for 1963 Simca 1000 tires?
Among the currently available 145R13 products for the 1963 Simca 1000, the visible sidewall style is blackwall. That gives Bertone Coupe owners a straightforward, understated appearance choice within the proper radial size rather than a wide range of decorative sidewall treatments.
Sidewall style still matters because it changes the overall presentation of a small 1960s European car. Even with a simple blackwall selection, buyers should still focus first on correct size, sub-model match, and wheel compatibility, since appearance only helps once the tire is properly matched to the Coupe's 13-inch radial setup.
What brands offer tires for the 1963 Simca 1000?
For the 1963 Simca 1000's available 145R13 radial products, the brands represented are Michelin and Firestone. Those options give buyers a choice between distinct tire series within the same basic size and blackwall presentation for the Bertone Coupe's 13-inch radial fitment.
Brand should be one part of the decision, not the whole decision. It makes sense to compare the series being offered, the rim-width specification where stated, load information where stated, and the kind of driving the car actually sees, especially on a light collector vehicle that may spend much of its life parked between outings.
Restoration & Appearance
Which tire should I choose for a period-style 1963 Simca 1000?
A period-style choice starts with the correct sub-model family and wheel diameter. On a 1963 Simca 1000, that means 5.50-13 or 145R13 for the Bertone Coupe and 5.60-12 or 155R12 for the Series, with the bias-ply sizes usually carrying the more traditional construction style.
Appearance goals should be balanced against how the car will actually be driven. For a restoration where exact historical detail matters, it is wise to compare the tire choice with marque references, photos, or restoration records, while still making sure the selected size and construction match the wheels currently on the car.
Does correct tire fitment matter for a 1963 Simca 1000 restoration?
Yes, correct tire fitment matters on a 1963 Simca 1000 restoration because the covered sub-models do not share the same tire and wheel combination. A restored Bertone Coupe and a restored Series can require different rim diameters, different size codes, and different construction choices.
The right fitment affects more than appearance. It also influences wheel compatibility, stance, and how convincingly the finished car reflects its intended period style, so the best approach is to confirm the sub-model first and then choose within that size family rather than treating all Simca 1000 restorations as the same.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1963 Simca 1000?
Yes, modifications can affect tire fitment on a 1963 Simca 1000, especially if the car has aftermarket wheels, altered suspension height, or body changes. Those factors can matter even more here because the model already spans both 12-inch and 13-inch wheel families depending on sub-model.
A car that no longer carries its original wheel setup should be measured carefully before a tire is selected. Checking actual rim diameter, wheel width, and visible clearance at the fenders and suspension points is a smart step, since a size that suits one Simca 1000 configuration may not suit another modified example.
What should I inspect before driving a 1963 Simca 1000 on new tires?
Before driving a 1963 Simca 1000 on new tires, inspect the wheels for correct diameter and condition, verify that the tires are mounted in the proper size for the car's sub-model, and make sure there is no visible interference at the fenders, steering components, or suspension areas.
It also helps to check inflation, valve stems, wheel fasteners, and the general condition of the suspension and brakes before heading out. On a collector-era compact that may sit for long periods, a short local test drive followed by another clearance and pressure check is a sensible way to confirm the setup is behaving properly.
How should tires on a collector 1963 Simca 1000 be maintained?
Tires on a collector 1963 Simca 1000 should be maintained with regular pressure checks, visual inspection, and attention to age-related condition. Even when tread wear looks light, an older low-mileage car can develop cracking, flat spotting, air loss, or sidewall damage simply from storage and infrequent use.
Storage conditions make a real difference, so keeping the car away from prolonged sunlight, excess heat, and ozone sources is worthwhile. It is also helpful to inspect the tires before every outing and after longer periods of storage, since small European collector cars often spend more time parked than driven and tire condition can change quietly.
