1963 Ford Mark III Tires

The 1963 Ford Mark III uses two primary tire sizes: 640-13 and 650-13. Both are numeric bias-ply sizes built for 13-inch rims, and both are associated with this model year. The covered Mark III Zodiac can also be found with either of these sizes, so the fitment question is not limited to one single code.

The smartest next step is to confirm the size already mounted on the car and compare it with the wheel width before choosing a replacement. That matters because the two sizes do not use the same product selection, sidewall offerings, or rim-width specifications. On a restored or modified car, the actual wheel setup should guide the final choice rather than assumption alone.

The 1963 Ford Mark III uses a 13-inch rim diameter with both of its primary tire sizes, 640-13 and 650-13. The last number in each size code identifies that rim diameter. Even though the two tires share the same wheel diameter, they are not identical in nominal section width or in the wheel-width ranges tied to available products.

Rim diameter is only one part of the fitment picture, so wheel width still needs to be checked before selecting a tire. Available 640-13 and 650-13 products are associated with different width ranges, and that can affect how the tire sits on the wheel. Any aftermarket wheel change makes that confirmation even more important before ordering or mounting tires.

No. The 1963 Ford Mark III Zodiac is associated with both 640-13 and 650-13 rather than one single size used across every example. Both are bias-ply fitments for 13-inch rims, so the sub-model itself does not narrow the decision to a single tire code in this case.

That means the practical check is the actual wheel and tire setup on the individual car. Looking at the current sidewall size, measuring wheel width, and confirming that the car has not been changed from its earlier setup will usually answer the question more clearly than the badge alone. Once size is confirmed, sidewall style and construction choice become much easier decisions.

640-13 is a bias-ply tire size on the 1963 Ford Mark III. It is part of the car’s primary vintage fitment and uses the older numeric sizing format common to compact and imported-era vehicles of the period. On this car, 640-13 belongs to the traditional bias-ply side of the decision rather than to a modern radial size format.

Keeping 640-13 in bias-ply form helps preserve a period-style construction and appearance, especially on a restoration-oriented car. A radial can still be considered through the available equivalents, but that becomes a conversion choice rather than the original-style fitment path. Wheel width, overall tire dimensions, and clearance should be checked carefully before moving away from the primary bias-ply size.

Both 640-13 and 650-13 share the same radial-equivalent choices: 175R13 as the 80-series metric radial, P175/75R13 as the 75-series P-metric radial, P185/70R13 as the 70-series P-metric radial, and 650R13 as the bias-look radial equivalent. Those options give the 1963 Ford Mark III owner several ways to move into radial construction while staying within the same basic fitment conversation.

Each equivalent uses a different sizing convention, so the choice is not just radial versus bias-ply. The buyer should compare wheel width, tire proportions, and available clearance before settling on one. The bias-look radial is especially relevant when the goal is to retain a more traditional visual presentation, while the metric and P-metric options reflect later radial sizing formats.

A 1963 Ford Mark III owner considering a move from 640-13 or 650-13 bias-ply tires to radial equivalents should first confirm wheel diameter and wheel width. The available radial alternatives for these sizes are associated with a 4-6 inch rim-width range, and that needs to match the actual wheel on the car before going further.

Clearance at the fenders, steering components, and suspension should also be reviewed, especially if the car has aftermarket wheels or any ride-height change. Tire age and condition matter too, since many collector cars sit for long periods. A radial equivalent can be considered as an alternative, but the car’s present wheel and chassis setup should be verified before making the change.

The first consideration is confirming whether the car uses 640-13 or 650-13, since both are primary bias-ply sizes for the 1963 Ford Mark III. After that, the decision usually comes down to wheel-width compatibility, sidewall appearance, and whether the goal is a period-style bias-ply tire or a radial-equivalent alternative.

Product differences matter once the size is settled. The available assortment varies by brand, tire series, whitewall treatment, and load specification, so two tires in the same nominal size may still suit different priorities. A car built with restoration appearance in mind may lead one way, while a driver-focused car may push the owner toward evaluating one of the radial-equivalent options.

The 1963 Ford Mark III tire selection includes both wide whitewall and narrow whitewall sidewall styles. The 640-13 offering appears in a wide whitewall, while 650-13 opens the door to both wide whitewall and narrow whitewall choices. That makes sidewall treatment one of the more visible differences among the available bias-ply products.

Sidewall style can change the car’s visual character more than many owners expect, especially on a compact early-1960s saloon with relatively small 13-inch wheels. A wider whitewall leans toward a more formal vintage presentation, while a narrower whitewall gives a subtler look. Appearance preference should still be balanced against the correct tire size and wheel-width compatibility.

Available tires for the 1963 Ford Mark III come from BFGoodrich, Coker Classic, and US Royal. BFGoodrich appears in the 640-13 fitment, while Coker Classic and US Royal are represented in 650-13. Those brand choices also bring different tire series into the mix, including Silvertown Classic Bias Ply, Coker Classic Bias Ply, and US Royal Classic Bias Ply.

Brand should be considered alongside the actual size needed, since not every brand is available in both primary sizes. Once size is confirmed, the buyer can compare whitewall width, series identity, and wheel-width range rather than looking at the brand name alone. That approach keeps the selection centered on fitment and appearance instead of treating all options as interchangeable.

For a period-style 1963 Ford Mark III, the starting point is one of the original-type bias-ply sizes used on the car: 640-13 or 650-13, depending on the wheel and existing setup. Staying with bias-ply construction preserves the vintage sizing format and the traditional look associated with an early-1960s small Ford.

After the size is confirmed, whitewall treatment becomes the main visual choice. Wide whitewall and narrow whitewall options create noticeably different presentations, and the best match depends on how the car is being restored. When exact originality matters at a judged level, marque references, period photos, and vehicle-specific documentation are worth consulting before settling on one sidewall style.

Tire construction affects both the look and the stance of a restored 1963 Ford Mark III because bias-ply and radial tires present the car differently even when they are chosen as equivalent sizes. The car’s primary fitments are bias-ply 640-13 and 650-13, so that construction remains the closest path to a traditional period-style presentation.

A radial equivalent may be worth considering for road use, but it should be viewed as an alternative rather than the same visual choice in another construction. Owners trying to keep the car’s vintage character often pay close attention to construction, sidewall style, and overall proportion together. The final decision should balance appearance goals with the actual wheel setup and intended driving use.

Yes. A 1963 Ford Mark III with aftermarket wheels, altered suspension height, or body changes may need closer fitment review even when using one of the known tire sizes. The car’s primary sizes are 640-13 and 650-13 on 13-inch rims, but wheel width and available clearance can change significantly once modifications enter the picture.

The safest approach is to verify the actual wheel dimensions on the car and inspect steering, fender, and suspension clearance before mounting new tires. That matters even more when considering a radial equivalent, since construction changes can alter how the tire sits and behaves on the wheel. A modified car should always be checked as it exists today, not as it left the factory.

Before driving a 1963 Ford Mark III on new tires, inspect the wheels for correct diameter and condition, confirm lug hardware security, and make sure the tires are mounted in the proper size for the car. A close visual check of steering and fender clearance is also worthwhile, especially if the car has been sitting or has had wheel changes over time.

Once the car is on the ground, pay attention to tire pressure, any sign of rubbing at full steering lock, and whether the vehicle tracks evenly on the road. Collector cars often hide suspension wear, so fresh tires can expose issues that older tires masked. A brief local drive followed by a second inspection is a sensible way to catch clearance or inflation problems early.

Collector-car tires in 640-13 or 650-13 should be maintained with regular pressure checks, routine visual inspections, and careful storage habits. Even when tread looks usable, a low-mileage 1963 Ford Mark III can still have tires affected by age, sunlight, long stationary periods, and general sidewall deterioration. Cuts, cracks, bulges, and air loss all deserve prompt attention.

Storage conditions matter almost as much as mileage on a lightly used car. Keeping the Mark III away from prolonged heat, moisture, and ozone sources helps protect the rubber over time. Periodic inspection of wheel condition and valve stems is also worthwhile, especially before a longer drive. A collector car that sits often should be checked more often than its annual mileage might suggest.