In 1977, Bentley remained the quietly formal side of British luxury motoring, offering hand-finished refinement in cars that shared much of their engineering character with contemporary Rolls-Royce models while maintaining a distinct marque identity. The 1977 Bentley range was focused and dignified rather than broad, and that simplicity carries over to tire fitment. For 1977 Bentley, one model uses one tire size, so the main choice is not between multiple fitments across the lineup but between radial tire products that suit your driving style, sidewall preference, and restoration goals. Before choosing a tire, confirm that your car is a Bentley T2 Series and that your wheels are set up for the correct 15-inch fitment.
Which Tire Size Is Right for Your 1977 Bentley
One tire size fits 1977 Bentley vehicles, and it applies to the full model range for the year. That means the decision is less about comparing multiple fitments and more about confirming the correct 15-inch wheel fitment and choosing the radial product that best suits the way you use the car. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 1977|Fit(s): T2 Series|Construction: Radial|Rim: 15-in rim
HR70-15 is an alphanumeric radial size, with the letter code identifying its era-specific sizing class, the 70 indicating the profile series, and the 15 identifying a 15-inch rim. This size is radial in construction and is the universal fitment for the 1977 Bentley T2 Series. Buyers who want the road manners associated with later-period radial construction should stay with this size, while still confirming the exact wheel setup on the car before selecting a specific tire.
One model is covered for 1977 Bentley, and the tire fitment is straightforward because the entire year-and-make range uses the same size. Since fitment does not vary by model, the real differences come down to the car's presentation, how original you want the finished look to be, and which radial tire best matches your intended use. Select the model below for model-specific fitment history and products.
1977 Bentley T2 Series
The Bentley T2 Series was the marque's formal full-size luxury saloon of the late 1970s, carrying the restrained Bentley identity in a highly refined, chauffeur-capable platform. Its tires mount on 15-inch wheels, and the fitment is centered on a single radial size rather than multiple model-dependent options. For owners, that makes product selection more about appearance and driving character than about sorting through several factory size paths.
These FAQs cover the single-size radial fitment used across 1977 Bentley models, what the HR70-15 code means, how wheel and tube questions affect setup, and what to inspect on a seldom-driven luxury collector car.
Size Basics & Fitment
What tire sizes fit 1977 Bentley vehicles?
1977 Bentley vehicles use one tire size: HR70-15. That size applies to the Bentley T2 Series, and it mounts on a 15-inch rim. Because the year-and-make range is limited to a single model core with a single fitment, there is no need to sort between multiple factory tire sizes across the lineup.
That simplicity is helpful, but it does not eliminate the need to confirm the car itself before purchase. Check that your car is in fact a 1977 Bentley T2 Series, verify the wheels are the proper 15-inch type, and inspect the existing tire or wheel markings if the car has been altered during restoration or long-term ownership.
What does HR70-15 mean on a 1977 Bentley tire?
HR70-15 is an alphanumeric radial tire size. The H identifies the tire's size class within this older alphanumeric system, the 70 indicates the profile series, and the 15 means the tire fits a 15-inch wheel. The presence of R in the code marks it as a radial rather than a bias-ply design.
For a 1977 Bentley owner, that code matters because it reflects a later-era fitment style that suits the car's period and intended road use. If you are comparing reproduction and collector-oriented tires, the key is to match the full size code and the 15-inch wheel requirement instead of trying to translate only part of the marking.
Do all 1977 Bentley models use the same tire size?
Yes. The 1977 Bentley range covered here uses one tire size, HR70-15, and that fitment belongs to the Bentley T2 Series. There are no alternate year-and-make sizes to separate by body style or trim at this level, so tire selection begins from the same basic fitment point for every 1977 Bentley on this page.
That does not mean every surviving car is still wearing its original wheel and tire combination. Many collector cars have had wheel changes, replacement rims, or long-ago substitutions, so it is smart to confirm the actual setup on the car before ordering. That quick check prevents confusion when a car's current tires do not match its correct period size.
Buying the Right Tire
What brands make tires for 1977 Bentley vehicles?
The 1977 Bentley fitment shown here identifies the correct size as HR70-15, but brand choice depends on which products are offered in that size. Since the car uses a single radial fitment, the brand conversation centers on finding an HR70-15 tire with the right appearance and specifications for a Bentley T2 Series rather than sorting among multiple size families.
When comparing brands, look past the name alone and study the sidewall styling, construction details, and intended presentation of the tire on the car. A Bentley of this era tends to look best when the tire's visual character matches the car's formal, understated luxury rather than calling attention to itself with an obviously modern or overly aggressive appearance.
What sidewall styles are available for 1977 Bentley tires?
Sidewall style can matter as much as size on a 1977 Bentley because the car's visual character is so closely tied to proportion and restraint. Within HR70-15 products, sidewall appearance may vary depending on the tire chosen, and that variation changes the way the car presents even when the fitment itself stays correct.
Owners restoring a T2 Series to a formal, period-appropriate look usually pay close attention to whether the sidewall style feels right for a late-1970s British luxury saloon. If the car is judged, photographed frequently, or kept very original, compare sidewall treatment carefully before making a final choice, because that cosmetic detail is immediately visible on a large, elegant sedan.
How do I choose the right tire for a 1977 Bentley if there is only one size?
With 1977 Bentley fitment, the question is not which size fits but which HR70-15 tire best suits the car's role. Every correct option starts from the same radial size, so the choice shifts to construction details, sidewall appearance, and the kind of driving the Bentley T2 Series will actually see.
A car used mainly for shows, preservation touring, or a highly original presentation may call for a tire that looks especially at home on a late-1970s luxury sedan. A car that sees more regular road use may lead you to prioritize overall road manners and confidence within the same fitment. In either case, matching the full size code remains the first requirement.
Fitting & Setup
Do 1977 Bentley tires require inner tubes?
Inner tube requirements for 1977 Bentley tires depend on the exact HR70-15 tire product and the wheel it is being mounted on. A radial tire in the correct size does not automatically answer the tube question by itself, because tube-type and tubeless practice can differ by tire design and by wheel condition or construction.
The safest approach is to check the sidewall marking on the specific tire you are considering and confirm that the wheel itself is suitable for the intended setup. On an older Bentley, wheel age, sealing surface condition, and restoration history all matter. If the car still carries original-style wheels, a knowledgeable installer familiar with collector vehicles is worth involving early.
Can the original 1977 Bentley wheels be used with the HR70-15 tire size?
Yes, HR70-15 is the correct 15-inch fitment for the 1977 Bentley T2 Series, so original 15-inch wheels are the natural starting point for this size. Since there is only one size used across the year-and-make range, you are not trying to make one factory tire size work on another factory wheel diameter.
Even so, original wheels should be inspected before mounting new tires. Collector cars can accumulate corrosion, bent rims, previous repairs, or finish buildup that affects bead seating and balance. If the wheels have been changed at any point in the car's life, confirm the actual diameter and overall suitability rather than assuming every wheel currently on the car remains factory-correct.
Maintenance, Storage & Longevity
How should I store a 1977 Bentley when the tires are fitted?
A 1977 Bentley should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, welders, furnaces, and other ozone-producing equipment. Radial tires generally tolerate static storage better than older bias-ply designs, but they still age from time, environment, and underinflation even when the car is not being driven.
Keep the tires inflated properly, move the car periodically if practical, and avoid leaving it parked for months on one contact patch in a damp garage. If the Bentley will sit for an extended period, many collectors use tire cradles or properly positioned stands to reduce stress. A clean floor and stable indoor temperature also help preserve both tire shape and sidewall condition.
How long do tires on a 1977 Bentley typically last?
Tires on a 1977 Bentley should be judged more by age and condition than by miles traveled. Many collector cars cover limited annual mileage, so tread depth can look healthy long after the tire itself has begun to age. A good rule is to begin close evaluation around five to seven years and to treat ten years as a serious replacement point regardless of remaining tread.
Check the tire's date code and inspect the sidewalls, shoulders, and tread area for cracking, hardening, bulges, or irregular wear. A heavy luxury car can mask aging tires because it is often driven gently, but age-related deterioration still matters. If the Bentley has spent years in storage, assume calendar age is the more important factor than odometer use.
How often should tires on a 1977 Bentley be inspected?
Tires on a 1977 Bentley should be inspected before every drive, with a more thorough check before any extended outing. Look for visible sidewall cracking, cuts, bulges, tread separation, uneven wear, and air loss. Because the Bentley T2 Series is a substantial luxury car, proper pressure and sound sidewall condition are especially important to how the car settles and tracks on the road.
A brief walkaround catches many problems before they become roadside issues. Use a quality pressure gauge, inspect valve stems, and do not ignore a tire that suddenly needs topping off more often than usual. Before a tour or highway trip, include the spare in the inspection routine so you are not relying on an aged or neglected backup tire if trouble arises.
Restoration & Authenticity
What tires were originally fitted to the 1977 Bentley T2 Series?
A 1977 Bentley T2 Series belongs to an era when radial construction was established on premium European luxury cars, and the correct year-and-make fitment here is HR70-15. That makes a radial tire in the proper alphanumeric size the appropriate starting point for an authentic restoration. Original-equipment brand choice can vary by market and delivery history, so size and construction matter more than guessing at a single universal brand.
If you are restoring the car for marque-level scrutiny, confirm any market-specific details through Bentley specialists, factory literature, or owner-club resources. A Bentley judged for originality will typically benefit from the correct size system, the correct radial construction, and a sidewall look that does not feel out of period for a late-1970s British luxury saloon.
Does correct tire fitment matter for showing a 1977 Bentley?
Yes, correct tire fitment matters on a 1977 Bentley because judges and knowledgeable enthusiasts notice tire size, construction type, and sidewall appearance quickly. The Bentley T2 Series uses HR70-15, so an obviously different modern size format or a visual style that clashes with the car's period can distract from an otherwise careful restoration.
For local casual shows, that may be a minor issue. For marque events or serious preservation judging, details become more important, and the tire should support the car's late-1970s presentation rather than pull it away from it. Event standards can vary, so owners aiming for authenticity should compare their chosen tire against Bentley club expectations before finalizing the setup.
Why does sidewall appearance matter on a 1977 Bentley restoration?
Sidewall appearance matters on a 1977 Bentley because the T2 Series is a formal design with large, visually prominent wheel openings and a very deliberate luxury aesthetic. Even when the size is correct, a sidewall treatment that looks too modern or too casual can change the overall impression of the car in photos, on the show field, and at normal standing distance.
That is why restoration-minded owners often compare sidewall styling almost as carefully as the fitment itself. The goal is not simply to find an HR70-15 tire that mounts, but one that belongs visually with the car's original character. If authenticity is important, choose the tire that best supports the Bentley's restrained, period-correct presentation.
Safety & Road Use
Are 1977 Bentley tires safe for highway driving?
A properly sized, properly maintained HR70-15 radial tire can be suitable for normal highway driving on a 1977 Bentley, provided the specific tire's speed rating and condition support that use. On a car of this age, tire safety depends not only on construction and size but also on age, inflation, storage history, and the mechanical condition of the suspension, brakes, and steering.
The practical takeaway is to treat the tire as one part of the whole vehicle system. A Bentley T2 Series may be capable of relaxed highway travel, but an older luxury car asks for more preparation than a modern daily driver. Confirm the tire's service rating, inspect it carefully, and make sure the chassis is equally ready before planning sustained higher-speed use.
What inflation pressure should I use for 1977 Bentley tires?
Inflation pressure for 1977 Bentley tires should be set by the vehicle manufacturer's specification for the Bentley T2 Series and checked against the tire maker's guidance for the exact HR70-15 product being used. Pressure should never be guessed from appearance alone, and one tire's maximum pressure marking is not a substitute for the car's recommended operating pressure.
Use the owner's manual, factory placard information if present, and the guidance that accompanies the specific tire. That combination gives you the best chance of preserving ride quality, handling balance, and tire life. After setting cold pressures, recheck them regularly, especially if the car sits for long periods or is being prepared for a longer trip.
What should I check before taking a 1977 Bentley on a longer drive?
Before a longer drive in a 1977 Bentley, inspect each HR70-15 tire for cracks, cuts, bulges, irregular wear, proper cold inflation, and secure valve stems. Check the spare as well, since many collector cars carry an older backup tire that has been forgotten for years. Tire age matters just as much as tread depth on a seldom-driven luxury car.
A longer trip also calls for a broader mechanical review. Make sure the brakes, steering, suspension, fluid levels, and cooling system are in equally sound condition, because tire confidence alone does not make an older Bentley road-ready. A careful pre-drive inspection turns the car into a more dependable tourer and reduces the chance of avoidable trouble far from home.
