The 1976 Jaguar XJS arrived as Jaguar’s new grand touring flagship, blending long-hood styling, high-speed composure, and a distinctly modern luxury-sport character for the mid-1970s. That character matters when choosing tires, because this car uses 15-inch radial fitments in both 205/70R15 metric form and ER70-15 vintage alphanumeric form. Available choices range from blackwall touring and performance-style radials to narrow and wide whitewall treatments, with a bias-look radial also in the mix for a more traditional presentation. For an XJS owner, the real decision is balancing period-style appearance, wheel setup, and intended road use while staying within the proper fitment range.
Which Tire Size Is Right for The 1976 Jaguar XJS
The 1976 Jaguar XJS uses two primary 15-inch radial tire sizes: 205/70R15 and ER70-15. Because both sizes appear across the covered XJS configurations and share the same rim diameter, the key step is confirming which sizing convention matches the car’s wheel and tire setup now. From there, the decision becomes choosing the right radial style, sidewall treatment, and overall presentation for restoration goals or regular road use.
205/70R15 is a metric radial size in which 205 is the nominal section width in millimeters, 70 is the aspect ratio, R identifies radial construction, and 15 is the rim diameter in inches. On the 1976 Jaguar XJS, it represents a modern radial fitment that suits the car’s grand touring character and broadens replacement choices. Available options include blackwall, narrow whitewall, and wide whitewall designs from brands such as Maxxis, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, and Travelstar. This size is the practical choice for owners focused on straightforward metric sizing and strong variety in tire series and appearance.
ER70-15 is an alphanumeric radial size, with the letter-based prefix identifying its vintage sizing class, 70 indicating the profile family, and 15 identifying the rim diameter. For the 1976 Jaguar XJS, this format carries a more period-oriented presentation while remaining a radial construction rather than a bias-ply tire. The most notable option in this fitment is the Dunlop SP Sport Aquajet, a blackwall bias-look radial that echoes a traditional visual character. This size deserves a closer look when the goal is retaining an older radial naming style or a more vintage tire appearance on the car.
Fitment is straightforward across the covered 1976 Jaguar XJS sub-models, since both use the same pair of 15-inch radial tire sizes. Checking the exact sub-model still helps confirm whether the car retains its original wheel type and whether a metric or alphanumeric radial presentation makes the most sense.
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1976 Jaguar XJS (Base) w/alloy wheels
The 1976 Jaguar XJS (Base) w/alloy wheels uses the same two radial tire fitments found across this page, so the tire decision is more about sizing style than a unique wheel diameter. That makes it easier to compare a metric radial with a vintage alphanumeric radial presentation before narrowing the choice by sidewall style and intended use.
The 1976 Jaguar XJS Base also uses the same 15-inch radial fitment choices, keeping size selection consistent across the covered versions of the car. Tire choice here comes down to whether the owner prefers a modern metric radial look or an ER70-15 style presentation, along with the available brand and sidewall options.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1976 Jaguar XJS Tires for Sale
Available 1976 Jaguar XJS tire choices center on 205/70R15 and include brands such as Maxxis, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, and Travelstar. The lineup spans blackwall, narrow whitewall, and wide whitewall radials, along with touring, classic, and bias-look radial series for different visual goals.
These 1976 Jaguar XJS tire FAQs focus on the two correct 15-inch radial size formats, how to choose among available brands and sidewall styles, and what to inspect before putting a collector-era grand touring Jaguar back on the road.
Tire Size & Fitment
What tire size fits a 1976 Jaguar XJS?
The 1976 Jaguar XJS uses two primary radial tire sizes: 205/70R15 and ER70-15. Both are 15-inch fitments, but they represent two different sizing conventions. The 205/70R15 uses modern metric radial notation, while ER70-15 uses a vintage alphanumeric radial format that looks more in keeping with period tire markings.
The important next step is confirming which size format matches the wheel and tire setup on the car now. Since both sizes share the same rim diameter, the decision often comes down to presentation, brand availability, and whether the owner wants a more modern metric-marked tire or a more traditional alphanumeric radial appearance.
What size rim does a 1976 Jaguar XJS use?
The 1976 Jaguar XJS uses a 15-inch rim diameter with both of its primary tire sizes, 205/70R15 and ER70-15. That shared rim diameter simplifies the basic fitment question because the car does not split between different wheel diameters in the covered fitments.
Rim diameter is only the first check, though. Wheel width still matters, especially when comparing among available 205/70R15 products, because individual tires carry different approved rim-width ranges. A car that has changed wheels over the years should be measured carefully before choosing a tire based only on diameter stamped on the existing sidewall.
Do all 1976 Jaguar XJS sub-models use the same tire size?
Yes, the covered 1976 Jaguar XJS sub-models share the same pair of radial tire sizes: 205/70R15 and ER70-15. That includes the Base model and the Base model with alloy wheels, so there is no separate sub-model-specific wheel diameter to sort through here.
Even with shared fitment, it still helps to confirm the car’s present wheel and tire combination before ordering replacements. A metric radial and an alphanumeric radial can suit the same vehicle while giving it a different visual character, so the owner should decide whether the goal is a more modern road-use setup or a more period-style appearance.
Choosing the Right Tire
What should I consider when choosing a 205/70R15 tire for a 1976 Jaguar XJS?
Start with the basics: correct size, radial construction, and a 15-inch wheel. From there, the 205/70R15 choices for a 1976 Jaguar XJS vary by brand, sidewall style, tire series, and approved rim-width range. Blackwall, narrow whitewall, and wide whitewall versions are all available, so the selection can support either a more restrained touring look or a stronger restoration-oriented visual statement.
Use the car’s intended role to narrow the field. A regularly driven XJS may call for a straightforward blackwall radial, while an appearance-focused car may lean toward one of the whitewall options. Wheel width, load specification, and the car’s current stance should be reviewed before settling on a tire, especially if the wheels are not the originals.
What sidewall styles are available for 1976 Jaguar XJS tires?
The 1976 Jaguar XJS has meaningful sidewall variety in 205/70R15. Available styles include blackwall, narrow whitewall, and wide whitewall. That gives the owner flexibility to keep the car understated and sporty with a blackwall tire or lean into a more formal grand touring appearance with either a narrower or broader whitewall treatment.
Sidewall choice affects the car’s visual balance more than many owners expect. An XJS with original-style luxury presentation may look more natural on a whitewall, while a blackwall tire tends to emphasize the car’s performance-touring side. The best choice depends on the wheel design, the overall restoration direction, and whether appearance or everyday driving character takes priority.
What brands offer tires for the 1976 Jaguar XJS?
Tire options for the 1976 Jaguar XJS include Maxxis, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, and Travelstar. Most of the variety appears in 205/70R15, where the available products cover blackwall, narrow whitewall, and wide whitewall formats across several distinct radial tire series.
Brand choice should be treated as one part of the decision rather than the whole decision. The more useful comparison is how each tire aligns with the car’s needs in size, sidewall appearance, rim-width compatibility, and general character. Once those fundamentals are settled, comparing brand and series becomes much more meaningful for the individual XJS.
Restoration & Appearance
Which tire should I choose for a period-style 1976 Jaguar XJS?
A period-style 1976 Jaguar XJS can reasonably start with either ER70-15 or 205/70R15, depending on whether the goal is older alphanumeric radial labeling or modern metric radial notation. The available selection also opens up different visual directions, including blackwall, narrow whitewall, wide whitewall, and a bias-look radial in the ER70-15 presentation.
The right choice depends on how faithfully the car is being presented and how important road use is to the owner. For a historically sensitive restoration, period photos, marque-club guidance, and build-specific references are worth checking before settling on a sidewall treatment. For a driver, appearance can be balanced more freely against availability and wheel compatibility.
How does tire construction affect the appearance of a restored 1976 Jaguar XJS?
On a 1976 Jaguar XJS, construction affects appearance less as a bias-ply-versus-radial issue and more through radial style and sidewall presentation. Both primary fitments are radial, but they do not look identical. A metric 205/70R15 reads as a later modern radial format, while ER70-15 carries a more vintage alphanumeric look.
That visual distinction can change how finished the car feels, especially on a restoration where wheel design and stance are already in focus. A blackwall radial usually keeps the presentation cleaner and more sporting, while whitewall versions shift the tone toward luxury touring. The best result comes from matching the tire’s look to the car’s trim, wheels, and restoration intent.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1976 Jaguar XJS?
Yes, modifications can affect tire fitment on a 1976 Jaguar XJS even when the tire size itself is correct. Aftermarket wheels, changed wheel width, suspension work, altered ride height, or body changes can all influence how a 205/70R15 or ER70-15 sits in the wheel opening and clears through steering and suspension travel.
That is why the car should be checked as it exists today, not only as it was originally configured. Measuring wheel diameter and width, inspecting clearance at full steering lock, and confirming the car is sitting correctly on its suspension can prevent avoidable fitment issues. Collector cars often evolve over time, sometimes without obvious visual clues.
What should I inspect before driving a 1976 Jaguar XJS on new tires?
Before driving a 1976 Jaguar XJS on new tires, inspect the wheels for damage, verify the wheel diameter and width, and make sure the old tires were not masking clearance problems. The suspension, steering, and alignment condition also deserve attention, since a fresh set of tires can quickly reveal problems that an older worn set had been hiding.
Tire condition checks should continue after installation. Watch for uneven wear, rubbing marks, persistent air loss, vibration, or steering pull during the first miles of use. A collector Jaguar that has spent long periods parked also benefits from a close look at wheel hardware, brake condition, and general roadworthiness before being returned to regular driving.
How should 205/70R15 tires on a collector 1976 Jaguar XJS be maintained?
205/70R15 tires on a collector 1976 Jaguar XJS should be maintained with regular pressure checks, visual inspection, and periodic review of tread and sidewall condition. Even if the car sees limited miles, aging still matters. Cracking, bulges, cuts, flat spotting, and slow air loss can develop on cars that spend more time stored than driven.
Storage habits make a real difference on low-use grand touring cars. Keeping the XJS away from prolonged sunlight, excess heat, moisture, and ozone sources helps protect the tire casing over time. Occasional movement of the car, proper inflation, and a routine inspection schedule are just as important as tread depth when the vehicle is used seasonally.
