1955 Bentley Tire Fitment Guide

1955 Bentley vehicles use three different tire sizes depending on model. The Bentley Continental and Bentley R-Type use either 185R16 radial or 650-16 bias-ply tires, both for 16-inch wheels. The Bentley S-Type uses 820-15 bias-ply tires on 15-inch wheels. Published rim-width ranges where available are 4.50 to 6.50 inches for 185R16 depending on product, 4.50 to 5.00 inches for 650-16 where specified, and 6.00 to 6.50 inches for 820-15.

That means the first fitment question on a 1955 Bentley is model identification, not brand selection. Continental and R-Type owners then choose between two constructions on the same wheel diameter, while S-Type owners need the separate 15-inch size family. If your car has had wheels changed during restoration, confirm the actual rim diameter and width on the car before settling on a tire.

On a 1955 Bentley, 650-16 is a numeric bias-ply size. The 6.50 figure is the nominal section width in inches, and the 16 is the wheel diameter in inches. That format belongs to the bias-ply era and is used on Bentley Continental and Bentley R-Type models, not on the S-Type. Several 650-16 options also publish a 4.50 to 5.00 inch rim-width range.

For a Bentley owner, 650-16 matters because it signals both the wheel diameter and the older construction style associated with mid-century tire fitments. If your priority is preserving a period-authentic look and feel on a Continental or R-Type, this is the size family to study first. It should not be treated as interchangeable with the S-Type’s 820-15 or assumed to fit any 16-inch wheel without checking rim width.

On a 1955 Bentley, 185R16 is a radial size with a nominal section width of 185 millimeters and a 16-inch wheel diameter. The R identifies radial construction, and in this Euro-metric style the profile is conventionally understood as an 80-series design even though the aspect ratio is not written into the size. This fitment applies to Bentley Continental and Bentley R-Type models, not to the S-Type.

The practical significance is that 185R16 gives Continental and R-Type owners a radial option within the correct 16-inch wheel diameter. Available products in this size include blackwall offerings with different sidewall markings and different speed ratings, so the exact tire should be chosen with your intended use in mind. It is a separate fitment path from the 650-16 bias-ply size even though both mount on 16-inch wheels.

For a 1955 Bentley Continental or 1955 Bentley R-Type, the choice between 185R16 and 650-16 is primarily a construction decision because both fit 16-inch wheels. The 185R16 options are radial blackwalls from Michelin, Avon, and Vredestein, while 650-16 is a bias-ply size available in both blackwall and wide whitewall styles. The S-Type is outside this comparison because it uses 820-15 instead.

Owners usually make this decision according to how the car will be presented and driven. A 650-16 bias-ply tire aligns with a more period-style restoration approach, while a 185R16 radial appeals to drivers who want a later-style radial construction on a Continental or R-Type. Once you choose the size family, compare the individual tire’s sidewall marking, speed rating, and wheel-width range rather than assuming every product in that size behaves the same way.

Sidewall choices vary by size on 1955 Bentley applications. The 185R16 radial options for Continental and R-Type are blackwall only. The 650-16 bias-ply size for Continental and R-Type is available in blackwall and wide whitewall form, while the 820-15 bias-ply size for the S-Type adds blackwall, narrow whitewall, and wide whitewall choices.

That variety matters most when the tire is part of the car’s visual presentation, not just its fitment. Blackwalls generally suit understated, formal luxury presentation, while whitewall width changes the visual period impression noticeably on a 1950s Bentley. If the car is being restored for judged events, confirm the expected sidewall style with a Bentley club or event rulebook before choosing between blackwall, narrow whitewall, or wide whitewall versions.

1955 Bentley tires are available from several brands depending on size. In 185R16, the radial choices are Michelin, Avon, and Vredestein. In 650-16, available brands include BFGoodrich, Coker Classic, Firestone, and Garfield. In 820-15, available brands include BFGoodrich, Firestone, and US Royal.

Brand choice on a 1955 Bentley usually follows the size and presentation you want first, then the product details within that size. Radial buyers for Continental and R-Type owners are choosing among three blackwall brands with different sidewall markings and speed ratings, while bias-ply buyers have more appearance options through blackwall and whitewall offerings. The right comparison is within the correct size for your model, not across the whole Bentley range.

Published rim-width ranges on 1955 Bentley tire options differ by size. The 185R16 radial products list 4.50 to 6.00 inches on one application and 5.0 to 6.5 inches on another. The 650-16 bias-ply products that publish wheel guidance list 4.50 to 5.00 inches. The 820-15 bias-ply products list 6.00 to 6.50 inches.

Those ranges are important because the tire size alone does not guarantee compatibility with every wheel carrying the same diameter. If your Bentley has original wheels, compare the measured wheel width against the range for the specific product you want. If the car has replacement rims from an earlier restoration, verify the actual wheel dimensions before mounting anything, especially when moving between radial and bias-ply choices on Continental or R-Type models.

Inner-tube status on 1955 Bentley tires depends on the specific size and product. In the 185R16 radial category, tube use varies by product: the Michelin X Radial is marked TT, while the Avon and Vredestein listings are not marked the same way. The 650-16 and 820-15 bias-ply product details shown here do not carry a mixed tube notation within their size descriptions, so the exact sidewall marking should still be checked on the tire you select.

That makes tube verification a product-level decision rather than a simple year-and-make assumption, especially for Continental and R-Type owners considering 185R16 radials. Before mounting, confirm whether the tire itself is marked tube type or tubeless and whether the wheel design is appropriate for that use. If the car will be driven regularly, replace aged tubes and valve stems at the same time rather than reusing old components.

On 1955 Bentley Continental and 1955 Bentley R-Type models, both 185R16 and 650-16 are 16-inch tire sizes, so they share the same wheel diameter. That means the original 16-inch wheels are the correct starting point for either size family. Rim-width compatibility still has to be checked against the specific product, because published width ranges are not identical across all 16-inch offerings.

For an owner comparing radial and bias-ply options, this is helpful because the choice is not automatically blocked by wheel diameter alone. The important follow-up step is measuring the wheel width and comparing it to the tire manufacturer’s stated range for the exact tire under consideration. That is especially worthwhile on cars with a long restoration history, where replacement wheels may not match original Bentley specifications perfectly.

A 1955 Bentley should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, and other ozone sources that accelerate rubber aging. Keep the tires properly inflated, move the car periodically if possible, and avoid leaving it parked for long periods on damp surfaces. Bias-ply tires such as 650-16 and 820-15 are more prone to temporary flat-spotting during static storage than radial tires like 185R16.

Long-term collector storage is easier on tires when the car’s weight is not left in one position for months at a time. If the Bentley will sit through a season, rolling it occasionally or supporting it correctly can help reduce deformation. Clean tires with mild soap and water only, and avoid dressings that leave a glossy solvent film, since appearance products can do more harm than good over time.

Tires on a 1955 Bentley are usually aged out before they are worn out, especially on collector cars that see occasional use. A sensible guideline is to begin evaluating them closely once they are five to seven years old and to treat roughly ten years as a serious replacement point regardless of remaining tread. The DOT date code on the tire sidewall is the best way to confirm age.

That approach matters because a lightly driven Bentley can still have tires that look acceptable from across the garage while the rubber has hardened internally. Sidewall cracking, loss of flexibility, vibration, or difficulty holding pressure are signs not to stretch service life further. If one tire is aging out, inspect the spare as well, since it is often the oldest tire on a collector car and gets overlooked.

Tires on a 1955 Bentley should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, embedded debris, uneven tread wear, and any sign that the tire has been run underinflated. If the tire setup uses inner tubes, include the valve stems and any slow pressure loss in your check because tube-related problems can develop even when tread looks healthy.

Frequent inspection is especially important on a heavy, low-use luxury car because problems can hide between outings. A Bentley that drives only on fair-weather weekends may spend more time aging in place than accumulating miles, so time matters as much as tread depth. Make pressure checks part of the routine when the tires are cold, and recheck after the first few miles if the car has been stored for an extended period.

A 1955 Bentley Continental would have belonged to an era when bias-ply construction was still the normal factory fitment standard, and the size family used here includes 650-16 bias-ply as well as 185R16 radial choices for the model today. That means a restorer pursuing strict period presentation will usually begin with the 650-16 size family rather than a later-style radial. No original-equipment brand should be assumed without checking Bentley literature for the exact market and coachwork.

Continental owners should treat size, construction, and sidewall appearance as separate authenticity decisions. A car restored for touring may end up with a different tire choice than one prepared for judged presentation, even though both use 16-inch wheels. If originality matters closely, confirm the expected specification with Bentley club archives, period road tests, or factory publications before deciding between blackwall and whitewall bias-ply options.

Correct tire fitment matters on a 1955 Bentley because judges and knowledgeable enthusiasts notice size, construction, and sidewall style very quickly. A Bentley Continental or R-Type wearing a modern-style radial where a period-style bias-ply presentation is expected may lose authenticity points, and the wrong whitewall treatment can look just as out of place. The S-Type’s separate 820-15 fitment also means using a Continental or R-Type size would be an obvious mismatch.

For show use, the goal is not only physical fit but visual and historical credibility. The closer the event is to concours-level judging, the more carefully you should match the tire’s construction and sidewall appearance to the standards expected for that specific Bentley model and market. Event rules and marque-club guidance are the best references, because acceptable deviations can differ from one show field to another.

For a 1955 Bentley Continental or R-Type in 185R16, both Michelin X Radial and Vredestein Sprint Classic are blackwall radial options, but their listed specifications are not identical. The Michelin is marked 185R16 92S TT, carries an S speed rating to 112 mph, and lists a 4.50 to 6.00 inch rim-width range. The Vredestein is marked 185VR16 93V, carries a V speed rating to 149 mph, lists a max load of 1,433 pounds at 51 psi, and publishes a 5.0 to 6.5 inch rim-width range.

That comparison shows why brand choice should follow a close reading of the exact sidewall marking and wheel requirements. A Bentley owner deciding between the two should verify the wheel width on the car, then decide which construction details align with the car’s intended use and presentation. Both are radial choices in the correct 16-inch size family, but they are not interchangeable in every setup without those checks.

1955 Bentley tires can be suitable for highway driving when they are the correct size for the model, in sound condition, and used within their stated ratings. The 185R16 radial choices for Continental and R-Type include S-rated products to 112 mph and V-rated products to 149 mph. The 650-16 and 820-15 bias-ply options shown here do not list speed letters in the same way, so they should be driven with the normal caution appropriate to a mid-1950s luxury car and bias-ply construction.

On a 1955 Bentley, tire condition is only part of the highway-safety picture. Brake performance, steering condition, suspension wear, and the overall health of the car matter at least as much as the tire itself once speeds climb. Before regular highway use, make sure the tires are correctly inflated, recently inspected, and matched to the model, and avoid assuming that a vintage-looking tire should be driven like a modern high-speed touring tire.

Inflation pressure on a 1955 Bentley should follow the factory recommendation for the car and the maximum stated figures on the specific tire you choose. Among the tire options here, several 650-16 products list a maximum load of 1,580 pounds at 32 psi, and several 820-15 products list 1,920 pounds at 32 psi. One 185R16 Vredestein radial lists 1,433 pounds at 51 psi. Those figures are tire ratings, not universal Bentley running pressures.

The practical rule is to start with the Bentley handbook or marque guidance for the vehicle, then confirm that your chosen tire is being used within the manufacturer’s published limit. Do not transfer a pressure number from a 15-inch S-Type tire to a 16-inch Continental tire, or from one radial brand to another. Cold-pressure checks are the standard reference, and even small pressure errors can change ride quality and wear on a heavy vintage car.

Before a longer drive in a 1955 Bentley, inspect each tire for cracking, cuts, bulges, exposed cords, unusual tread wear, and proper cold inflation pressure. Check the valve stems, and if the car uses tube-type tires or tubes within the tire setup, pay attention to any slow leaks or age-related stem hardening. Include the spare tire in the same inspection, since a long trip is exactly when an unusable spare becomes a serious problem.

That tire check should be part of a wider pre-drive routine for a mid-1950s Bentley. Wheel fasteners, brakes, steering response, fluid levels, and lighting deserve attention before distance touring, especially if the car has been sitting. Tire problems rarely appear in isolation, so a methodical walk-around and short shakedown drive can reveal vibration, pulling, or heat buildup before you are far from home.