1978 Rolls Royce Tire Fitment Guide

1978 Rolls Royce vehicles use two tire sizes across three models. The Camargue and Corniche use 235/70R15, while the Silver Shadow uses HR70-15. Both sizes are radial constructions and both mount on 15-inch wheels. For 235/70R15, the rim width range runs from 6.0 to 8.5 inches depending on the tire chosen.

That means year and make alone are not enough to choose correctly for a 1978 Rolls Royce. Start by identifying the model, then confirm the tire size already on the car and compare it to the wheel actually fitted. If your car has been restored or re-wheeled at some point, checking the wheel width before purchase is especially worthwhile.

On a 1978 Rolls Royce, 235/70R15 is a metric radial size. The 235 is the nominal section width in millimeters, 70 is the aspect ratio, R means radial construction, and 15 is the wheel diameter in inches. This size belongs to the Camargue and Corniche in the 1978 model range.

That code matters because it gives you a modern, easy-to-read dimensional reference when comparing brands and sidewall treatments. Within 235/70R15, you can move between blackwall, redline, and raised white letter styles, but you still need to match the wheel width and check the exact speed rating and tubeless marking on the tire you prefer.

On a 1978 Rolls Royce, HR70-15 is an alphanumeric radial size. The letter code identifies the tire's size class, the 70 indicates the profile series, and the 15 is the wheel diameter in inches; in the available Michelin version, the H speed rating means a 130 mph ceiling. This size applies to the 1978 Silver Shadow rather than the Camargue or Corniche.

Alphanumeric radials can look less familiar than modern metric sizing, but they were common on premium cars in this period. If you own a Silver Shadow, the right approach is to confirm that HR70-15 matches the wheel and the car's current setup instead of substituting a Camargue or Corniche size simply because all three models use 15-inch wheels.

No. The 1978 Rolls Royce Camargue and Corniche use 235/70R15, while the 1978 Rolls Royce Silver Shadow uses HR70-15. All three are 15-inch radial applications, but the size families are not the same across the entire make for that year.

That split is important because many buyers reach the year-and-make level before narrowing down the exact model. Once you identify the car correctly, the rest of the decision becomes much simpler: compare sidewall style, brand character, rim-width suitability, and speed rating within the correct size rather than trying to compare the whole 1978 Rolls Royce range at once.

The choice is determined by model first, not by personal preference alone. A 1978 Rolls Royce Camargue or Corniche uses 235/70R15, while a 1978 Rolls Royce Silver Shadow uses HR70-15. Both are radial 15-inch fitments, so this is not a bias-ply-versus-radial decision; it is a matter of matching the correct size family to the correct car.

Once you know the model, then it makes sense to compare the tires within that size by sidewall appearance, brand, speed rating, and wheel-width compatibility. Owners who want a certain visual style may lean toward blackwall, redline, or raised white letter depending on the car's presentation, but the first priority is staying with the size intended for that specific 1978 Rolls Royce model.

1978 Rolls Royce tires are available in several sidewall styles depending on size. The 235/70R15 fitment used by the Camargue and Corniche comes in blackwall, redline, and raised white letter form. The HR70-15 fitment for the Silver Shadow is available as a blackwall radial in the Michelin XVS line.

For a Rolls-Royce of this era, blackwall is generally the most restrained and formal visual choice, especially for luxury-saloon presentation. Redline and raised white letter sidewalls create a more assertive appearance and can suit certain personalized builds, but buyers focused on a factory-appropriate luxury look usually begin with blackwall before considering more overt sidewall treatments.

1978 Rolls Royce vehicles are served by several tire makers, depending on size. The 235/70R15 fitment is available from Cooper, Avon, BFGoodrich, and Michelin, while HR70-15 is available from Michelin. That gives Camargue and Corniche owners a wider mix of appearance choices, while Silver Shadow owners have a more focused luxury-touring option.

Brand choice on a collector Rolls-Royce often comes down to how you use the car and how closely you want the tire's character to match the vehicle's presentation. Some owners prioritize a traditional premium blackwall look, while others want a more distinctive sidewall treatment. After narrowing by appearance, compare the exact load, wheel-width, and speed-marking details for the tire you are considering.

Rim width guidance is available for the 1978 Rolls Royce 235/70R15 fitment. Depending on the tire, that size fits wheels from 6.0 to 8.5 inches wide, with individual products covering 6.0 to 8.0 inches or 6.0 to 8.5 inches. Both the Camargue and Corniche use this size.

That range is wide enough that wheel measurement matters before you settle on a specific tire. If your 1978 Rolls Royce has original wheels, the fit may be straightforward, but restored cars sometimes pick up wheel changes over the years. Measuring the installed wheel and matching it to the exact tire's approved width range is the cleanest way to avoid mounting issues.

Inner-tube requirements on 1978 Rolls Royce tires vary by product rather than staying uniform across the whole year and make. The available Michelin XVS in HR70-15 is marked TL for tubeless use, while the 235/70R15 group includes products without a universal tube marking across every option. Both sizes are radial applications on 15-inch wheels.

The practical step is to check the exact sidewall marking of the tire you plan to use and make sure it matches the wheel's design and condition. Older luxury-car wheels can have their own sealing considerations, so a tubeless-marked tire does not remove the need to inspect the wheel carefully before installation on a 1978 Rolls Royce.

Both tire sizes used on 1978 Rolls Royce models mount on 15-inch wheels, so the wheel diameter itself is shared across the range. That does not mean the sizes are interchangeable from one model to another, because the Camargue and Corniche use 235/70R15 while the Silver Shadow uses HR70-15. Rim width approval must still be checked against the specific tire selected.

If your car still wears its original wheels, staying within the correct model-specific size is the safest starting point. If the car has been altered, verify not only the diameter but also the wheel width and the tire's approved fitment range. That extra step matters more on a heavy luxury car than on a casual hobby vehicle with looser visual expectations.

A 1978 Rolls Royce should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone sources that can age rubber. Keep the tires clean, maintain inflation, and move the car periodically so one section of the casing is not carrying the full load for months at a time. Because both factory fitments here are radial, long static storage is generally easier on them than on older bias-ply tires, but flat-spotting can still occur.

Collectors who store a Rolls-Royce for an extended season often benefit from either occasional movement or carefully supporting the vehicle to reduce sustained stress on the tires. If the car is kept indoors for long periods, inspect the sidewalls and tread before the first outing of the season and bring pressures back to your chosen running level before driving.

Tires on a 1978 Rolls Royce usually age out before they wear out, because many collector cars see limited annual mileage. A good rule is to begin evaluating them closely once they are around five to seven years old and to treat around ten years as the point where replacement deserves serious consideration, regardless of tread depth. The DOT date code on the tire tells you when it was made.

Luxury cars that spend much of their lives parked can look fine at a glance while the rubber hardens internally and sidewalls begin to crack. That is why age matters more than mileage for most 1978 Rolls Royce cars. If the tires are older, a thorough inspection from a knowledgeable shop is worth doing before any extended road use.

Tires on a 1978 Rolls Royce should be inspected before every drive, and again more carefully before any longer outing. Look for sidewall cracking, bulges, cuts, uneven wear, embedded debris, and any sign that the tire is losing air. On cars using tubeless-marked tires such as the Michelin XVS in HR70-15, pay close attention to valve stems and wheel sealing surfaces as well.

A quick walk-around catches many of the issues that turn into roadside problems on older cars. A deeper inspection every few months is smart even for a lightly used Rolls-Royce, especially if the car sits for long periods between drives. Consistent pressure checks are just as important as tread checks, since an underinflated tire can change how a heavy luxury car feels and responds.

A 1978 Rolls Royce Silver Shadow would have been a radial-era luxury car, and its correct size family in this fitment guide is HR70-15. That matches the period's move toward radial construction on premium saloons, especially where ride quality, stability, and refined touring manners mattered. Original-equipment brand and market-specific variations should be confirmed through Rolls-Royce club references or factory literature.

For a restoration-minded owner, the important points are the right size family, the correct 15-inch wheel fitment, and a sidewall treatment that suits the formal character of the car. If the goal is concours accuracy rather than simply road use, check event rules and marque resources before finalizing the tire, since judges often look closely at construction type, size presentation, and sidewall appearance.

Correct tire fitment absolutely matters when a 1978 Rolls Royce is judged or presented at a high level. Size, construction type, profile family, and sidewall appearance all affect whether the car looks period-appropriate. On a formal luxury car, an obviously mismatched sidewall treatment or the wrong size family can stand out quickly even to casual observers.

That does not mean every event applies the same standard, but it does mean you should decide early whether your car is being restored for authenticity, touring, or personalized use. A buyer pursuing show-field accuracy should compare the car to marque references and consult club judging guidance, while a road-focused owner may accept a different visual choice if it better suits how the car is driven.

For a 1978 Rolls Royce in 235/70R15, Michelin XVS and BFGoodrich Silvertown Radial differ in sidewall presentation, speed marking, weight, and wheel-width approval. The Michelin XVS appears as a blackwall 235/70HR15 101H TL, weighs 30 pounds, and fits 6.00 to 8.50-inch rims. The BFGoodrich Silvertown Radial comes as a redline 235/70R15, carries a 1,896-pound load figure at 35 psi, weighs 29 pounds, and also fits 6.00 to 8.50-inch rims.

That makes the comparison less about raw fit and more about character. The Michelin leans toward a restrained, premium touring presentation with an explicit H speed rating and tubeless marking, while the BFGoodrich adds a distinctive redline look with closely similar wheel-fit dimensions. On a Camargue or Corniche, the deciding factor is often whether you want understated elegance or a more expressive period-custom appearance.

1978 Rolls Royce tires can be suitable for highway driving when they are the correct size, properly inflated, in sound condition, and used within their marked speed capability. Within the 235/70R15 group, available speed ratings include H at 130 mph and V at 149 mph, while the Michelin XVS in the HR70-15 family is H rated to 130 mph. All of these are radial constructions, which suits the long-distance touring nature of late-1970s luxury cars.

Tire capability is only part of the equation on a 1978 Rolls Royce. Brake condition, suspension age, steering wear, alignment, and the overall mechanical state of the car matter just as much on a longer road run. Even with a generous speed rating on the sidewall, the wiser approach is to drive within the car's condition and maintain a healthy margin rather than treating the tire's rating as the only limit.

Inflation pressure on a 1978 Rolls Royce should follow the factory guidance for the car and the rating information on the exact tire you choose. In 235/70R15, available load figures include 1,896 pounds at 35 psi and 1,819 pounds in another option; those numbers describe tire capacity at stated pressure, not a universal running recommendation for every 1978 Rolls Royce model. Pressure should never be copied from one size to another without checking the tire and the vehicle.

The best practice is to start with the owner's manual or the car's original inflation placard, then confirm that your chosen reproduction or modern radial is being used within its own published range. If the car carries unusual loads or spends most of its life at touring speeds, review the manufacturer's guidance again after installation and adjust only within approved limits.

Before a longer drive in a 1978 Rolls Royce, inspect all four tires and the spare for cracking, cuts, bulges, uneven wear, and proper inflation. Confirm that the valve stems are sound, that each tire is seated correctly on the wheel, and that the speed rating and general condition fit the kind of driving you have planned. If the car uses a tubeless-marked radial such as the Michelin XVS, wheel sealing condition deserves attention too.

A tire check should be part of a broader pre-trip routine on any late-1970s luxury car. Brake feel, fluid levels, cooling-system behavior, steering response, and suspension condition all influence how safely and comfortably the car will cover distance. The goal is not only avoiding a puncture or failure, but making sure the whole vehicle is ready to use the tire as intended.