1961 Humber Tire Fitment Guide

1961 Humber vehicles use four sizes split across two models. The Humber Hawk takes either 175R15 in radial form or 640-15 in bias-ply form, while the Humber Super Snipe takes either 185R15 in radial form or 775-15 in bias-ply form. All four sizes mount on 15-inch wheels, but the approved rim width range changes by size, with 640-15 products spanning roughly 4.00 to 5.00 inches, 185R15 products spanning about 4.5 to 6.50 inches, and 775-15 products spanning about 4.50 to 6.00 inches.

That means year and make alone are not enough to choose a tire for a 1961 Humber. Start by confirming whether your car is a Hawk or a Super Snipe, then match the tire to the wheel's rim width and the kind of driving you expect to do. The radial and bias-ply choices are not interchangeable across the two models just because they share a 15-inch rim diameter.

On a 1961 Humber, 640-15 is a numeric bias-ply size. The 6.40 figure is the nominal section width in inches, written without a decimal in common tire shorthand, and the 15 is the wheel diameter in inches. For the Hawk, that size represents the traditional early-1960s construction and appearance, especially when paired with wide whitewall or narrow whitewall styling.

Numeric sizing can look unfamiliar if you are used to modern metric radials, but it is normal for period British and American bias-ply tires. When replacing a 640-15, verify both the wheel width and the sidewall style you want, because the visual effect can change quite a bit even when the size code stays the same. That matters on a formal saloon like the Humber Hawk, where the tire can influence the car's overall presentation.

On a 1961 Humber, 185R15 is a Euro-metric radial size used on the Super Snipe. The 185 is the nominal section width in millimeters, the R identifies radial construction, and the 15 is the wheel diameter in inches. In this older metric convention, the aspect ratio is not printed, and the size is conventionally understood as an 80-series radial.

That code matters because it tells you you are looking at a radial fitment rather than a bias-ply one, even though both mount on 15-inch wheels. For a 1961 Humber Super Snipe, 185R15 also opens up sidewall appearance choices such as blackwall, narrow whitewall, and redline. If your goal is to keep the car comfortable and road-friendly for touring, this format often becomes the more natural starting point.

The answer depends on which 1961 Humber model you own and how you want the car to feel and present itself. The Hawk pairs 640-15 bias-ply with 175R15 radial, while the Super Snipe pairs 775-15 bias-ply with 185R15 radial. Bias-ply tires are closer to the construction Humber buyers would have seen in 1961, while the radial options reflect the move toward more modern road manners that many collector-car owners prefer for regular use.

Choose the bias-ply size if restoration accuracy and period appearance are your main priorities. Choose the radial size if you want a tire that better suits longer road use and a more familiar modern-driving feel, provided the wheel width is appropriate for that radial. Either way, match the decision to the correct model first, because Hawk sizes and Super Snipe sizes are not the same.

1961 Humber tires cover a surprisingly broad range of sidewall styles, depending on the size. The Hawk's 640-15 bias-ply offerings come in wide whitewall and narrow whitewall form. The Super Snipe's 185R15 radial choices include redline, narrow whitewall, and blackwall, while the 775-15 bias-ply choices include redline, narrow whitewall, and goldline.

For a formal British saloon from 1961, narrow whitewall or blackwall often looks more in character than a more overt American-style sidewall treatment, but owner taste and market history matter. A car restored for authenticity should use a sidewall style that fits the way the vehicle was delivered and shown in its market. If presentation is especially important, compare your car against period photos or consult a Humber specialist before finalizing the look.

Four brands cover 1961 Humber fitments across the available sizes. The 640-15 bias-ply for the Hawk comes from BFGoodrich and Firestone. The 185R15 radial for the Super Snipe comes from Coker Classic and Michelin, while the 775-15 bias-ply for the Super Snipe comes from BFGoodrich and Firestone.

That mix gives Humber owners a choice between classic American reproduction bias-ply lines and established radial offerings with more contemporary road manners. Brand choice often comes down to the sidewall style you want, the construction you prefer, and the approved rim width of your wheels. It is also worth comparing speed rating and load information within a size when that information differs from one product to another.

Rim width depends on the size fitted to your 1961 Humber. The 640-15 used on the Hawk fits wheels in the 4.00 to 5.00 inch range depending on product, with some versions centered on 4.00 to 4.50 inches and others on 4.50 to 5.00 inches. The Super Snipe's 185R15 radial fits roughly 4.5 to 6.50 inch rims, while 775-15 bias-ply products span about 4.50 to 6.00 inches, including some that are intended for a 6-inch wheel.

That spread is why wheel measurement matters even when the tire code seems right. A 15-inch rim diameter alone does not guarantee that every tire in a given size is suitable for your particular wheel. Measure the wheel or confirm it against a trusted marque source before committing, especially if your Humber has replacement wheels or has been altered from original specification at some point in its life.

Tube status varies by size on 1961 Humber applications. The 185R15 radial products for the Super Snipe are marked tubeless, while the bias-ply 640-15 and 775-15 products do not carry tubeless markings in the available fitments. That makes the radial Super Snipe option the clearest tubeless application among the Humber sizes covered here.

Whether a tire should actually be run with a tube also depends on the wheel design and condition, not just the tire itself. Original wheels from the early 1960s can have features that affect tube use, sealing, and valve-stem choice. Before final installation, confirm the wheel type and the exact sidewall markings on the tire you intend to run so the setup matches both the product and the wheel.

No, not across the full 1961 Humber range. All four Humber sizes use 15-inch wheels, but the Hawk's sizes and the Super Snipe's sizes are model-specific, and their approved rim width ranges are not identical. A wheel that is correct for one model's tire may not be the best match for the other model's size family, even though the rim diameter is the same.

Within the correct model, a buyer can usually focus on whether the wheel width is suitable for the chosen bias-ply or radial option. That is especially important when switching from a narrower period bias-ply fitment to a wider metric radial. If your 1961 Humber still wears factory wheels, verify their width before changing construction type, and if the car has aftermarket or later replacement wheels, verify both width and profile carefully.

A 1961 Humber should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment. Keep the tires properly inflated and move the car periodically so the same contact patch is not carrying the load for months at a time. Bias-ply tires such as 640-15 and 775-15 are more prone to temporary flat-spotting during long static storage than radial sizes like 175R15 or 185R15.

If the car will sit for an extended season, many owners either roll it occasionally or support it in a way that reduces prolonged tire loading without hanging the suspension improperly. Clean, dry floors and breathable car covers help more than tightly sealed plastic around the tires. Good storage habits matter just as much as tread depth on collector cars, because age and environmental exposure usually end a tire's service life before mileage does.

On a collector car such as a 1961 Humber, tire age usually matters more than accumulated miles. A sensible rule is to begin close inspection and professional evaluation once tires are around five to seven years old, and to treat roughly ten years from the date code as a point where replacement deserves serious consideration regardless of remaining tread. That applies to both radial and bias-ply construction.

Many Humbers see light annual use, which can make old tires look deceptively healthy. Check the date code on each tire and avoid assuming a tire is still fit simply because the tread is deep and the car has been garaged. The older the tire, the more important it becomes to watch for age cracking, hardening, and changes in the way the car rides or holds pressure.

Tires on a 1961 Humber should be checked before every drive, with a more thorough inspection before any longer outing or highway trip. Look for sidewall cracking, weather checking, tread separation signs, unusual wear, cuts, bulges, and slow pressure loss. If your Humber uses a bias-ply setup or any wheel-and-tube combination that requires tube service, valve stems and tube condition deserve special attention as part of the inspection.

A quick visual walkaround catches more problems than many owners expect, especially on cars that sit between drives. Follow that with regular pressure checks using a reliable gauge and occasional inspection of the spare, which is often forgotten until it is needed. On an older British saloon, tire condition is part of the broader roadworthiness picture, not a separate maintenance item.

For a 1961 Humber Hawk, bias-ply construction is the most era-appropriate starting point when discussing original-type fitment. The Hawk's size family includes 640-15 as the traditional bias-ply choice, alongside 175R15 as a radial alternative that reflects later owner preference rather than the default early-1960s norm. Humber, like most manufacturers of the period, sold cars in a market where bias-ply tires were still standard equipment on many saloons.

If your goal is a faithful restoration, begin with 640-15 and then narrow the choice by sidewall appearance. For market-specific or trim-specific judging, consult Humber clubs, period road tests, factory literature, or event rules before making a final call, because details such as blackwall versus whitewall presentation could vary by destination market and owner-delivery preference.

Yes, correct tire fitment matters on a 1961 Humber if the car is being judged for authenticity. Size, construction type, and sidewall appearance all affect whether the car looks period-correct. A radial on a car judged to strict originality standards can stand out just as much as an obviously modern sidewall treatment, while the wrong width or an inappropriate decorative stripe can change the character of a formal British saloon.

For show use, the tire should support the story the restoration is trying to tell. A touring-oriented Humber restored for road use may reasonably wear a radial, but concours judging can favor the bias-ply style and sidewall presentation that best matches period delivery. Club guidance and event score sheets are the best final authority, because judging standards can differ from one organization to another.

For the 1961 Humber Super Snipe, the original-type approach begins with bias-ply construction as well. The model's fitment family includes 775-15 as the traditional bias-ply option and 185R15 as the radial alternative for owners who want a different driving character. In the Super Snipe's early-1960s context, the bias-ply tire is the one most closely aligned with factory-era expectations.

That does not mean every restored Super Snipe must wear a bias-ply tire, but it does mean originality-minded owners should treat 775-15 as the reference point. From there, choose a sidewall style that suits the car's presentation and intended judging standard. If the car has an unusual market history or special coachwork, marque-specific advice becomes even more valuable before the final tire decision is made.

1961 Humber tires can be suitable for highway driving when they are the correct size, properly mounted, correctly inflated, and in sound condition. The clearest published speed information appears on the 185R15 radial fitments for the Super Snipe, where H- and V-rated versions are available with speed ceilings of 130 mph and 149 mph. The other Humber sizes here do not carry published speed-letter markings in the same way, so their safe use depends even more on condition, inflation, and realistic operation within the car's own limits.

On a 1961 Humber, brakes, suspension, steering condition, and the car's age matter just as much as the tire itself during highway use. A well-sorted car on fresh, properly chosen tires is a very different proposition from one riding on aged rubber, even if the tread looks fine. Before sustained highway driving, evaluate the whole car as a system rather than treating the tire as the only variable.

Inflation pressure on a 1961 Humber should not be guessed from size code alone. The available load-and-pressure figures show 640-15 products at either 970 pounds at 32 psi or 1190 pounds at 32 psi depending on the tire, 185R15 radial products at 1355 pounds at 35 psi where a load figure is published, and 775-15 bias-ply products at 1490 pounds at 32 psi. Those are tire capacity figures, not automatic vehicle settings.

Use the Humber owner's literature or marque references for the car's baseline inflation recommendation, then make sure the tire itself is being used within its rated limits. Do not transfer a pressure figure from the Hawk to the Super Snipe or from one construction type to another. If you are changing from bias-ply to radial, treat inflation as part of the conversion and confirm the recommendation with the tire manufacturer.

Before a longer drive in a 1961 Humber, inspect each tire for weather cracking, cuts, bulges, punctures, irregular wear, and proper inflation, and do not forget the spare. Confirm that the valve stems are in good condition and that any wheel-and-tube setup is leak-free and secure. On a car of this age, tire checks should be part of a larger pre-drive routine that also includes steering, brakes, cooling, and fluid condition.

Longer trips expose old-car weaknesses that short local drives may not reveal. If the car has been sitting, give the tires time to show whether they hold pressure and whether any flat-spotting clears normally after a few miles. A careful pre-trip inspection reduces surprises and helps ensure the Humber's road manners remain predictable once you are well away from home.