The 1998 Jaguar XJR sits at a distinctive point in Jaguar sedan history, blending traditional XJ luxury with supercharged performance and a far more aggressive road stance than the standard car. That balance of refinement and speed makes tire selection especially important, because the car relies on a single 255/40R18 radial fitment on an 18-inch wheel. Within that size, the choice comes down to selecting the right modern radial option and comparing differences in tire series and blackwall presentation. For an XJR that is kept close to its original character, the goal is less about finding a different size and more about matching the car's intended handling feel, wheel fitment, and road use.
Which Tire Size Is Right for The 1998 Jaguar XJR
The 1998 Jaguar XJR uses one primary tire size: 255/40R18, a metric radial mounted on an 18-inch rim. The 1998 Jaguar XJR Base uses that same fitment, so the main decision is not choosing between multiple primary sizes, but selecting the right tire within that size based on series, specifications, and the way the car is driven and maintained.
The 255/40R18 size uses a modern metric radial format, with 255 indicating nominal section width in millimeters, 40 indicating the aspect ratio, and 18 indicating rim diameter in inches. On the 1998 Jaguar XJR, this radial fitment matches the car's late-1990s performance-luxury character and its 18-inch wheel setup. Available options in this size come from BFGoodrich in several g-Force series, all with a blackwall sidewall treatment. Choosing among them means comparing the specific tire series along with rim-width compatibility, load figures where stated, and the kind of road use expected from the car.
Sub-model fitment is straightforward for the 1998 Jaguar XJR. The covered sub-model uses the same primary tire size, so the key step is confirming that the car still retains the correct 18-inch wheel setup before choosing among available tires.
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1998 Jaguar XJR Base
The 1998 Jaguar XJR Base uses the same 255/40R18 radial tire size as the core fitment for this model. That keeps selection focused on choosing the right modern radial within the correct size, while also confirming wheel width and overall vehicle setup if the car has been altered from stock.
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 1998 Jaguar XJR Tires for Sale
Available 255/40R18 choices for the 1998 Jaguar XJR come from BFGoodrich and center on several g-Force series. Each is a blackwall radial, with similar 18-inch fitment but meaningful differences in series designation, stated load specification, and rim-width range.
These FAQs for the 1998 Jaguar XJR focus on the single 255/40R18 fitment, 18-inch wheel compatibility, tire-series selection, and the checks that matter before road use on a performance-oriented Jaguar sedan.
Tire Size & Fitment
What tire size fits a 1998 Jaguar XJR?
The 1998 Jaguar XJR uses a 255/40R18 radial tire. That is the primary fitment for this model and it matches an 18-inch rim, making it the starting point for replacement tire selection on an unmodified car.
Because this XJR uses one primary size, the real decision is choosing the right tire within 255/40R18 rather than moving between different fitments. It is still worth checking the actual wheels on the car, since aftermarket changes can alter width, clearance, and the range of tires that can be used safely.
What size rim does a 1998 Jaguar XJR use?
The primary tire fitment for a 1998 Jaguar XJR uses an 18-inch rim. The 255/40R18 size is built around that wheel diameter, so confirming that the car still has 18-inch wheels is one of the first steps before ordering replacement tires.
Rim diameter is only part of the picture, especially on a performance sedan like the XJR. Wheel width also matters, and the available 255/40R18 products in this application are intended for rims in the 8.5- to 10-inch range. A wheel change from a previous owner can affect both fitment and tire choice.
Does the 1998 Jaguar XJR Base use the same tire size?
Yes. The 1998 Jaguar XJR Base uses the same 255/40R18 radial tire size as the core 1998 Jaguar XJR fitment. That keeps sub-model fitment simple, since there is not a second primary tire size to sort through for this application.
Even with shared fitment, it is still smart to inspect the actual wheel and tire setup on the car before replacing anything. A Jaguar that has been modified with different wheels, altered ride height, or nonstandard suspension parts may still need extra clearance and compatibility checks despite starting from the same factory-size format.
Choosing the Right Tire
What should I consider when choosing a 255/40R18 tire for a 1998 Jaguar XJR?
Start with the correct 255/40R18 size and the 18-inch wheel requirement, then compare the available radial tire series within that fitment. For the 1998 Jaguar XJR, the differences are less about basic size and more about the specific BFGoodrich g-Force series, stated load figures where shown, and wheel-width compatibility.
A good selection process also takes the car's use into account. A lightly driven collector sedan may call for a different choice than an XJR that sees regular highway miles. Checking the wheel width, tire age, and general condition of the suspension helps ensure the chosen tire suits both the car and the way it is driven.
What sidewall styles are available for 1998 Jaguar XJR tires?
The available 255/40R18 tires for the 1998 Jaguar XJR use a blackwall sidewall style. That gives the car a clean late-model performance look that suits the XJR's understated but sporting character without introducing whitewalls, redlines, or other vintage-style sidewall treatments.
Since sidewall choice is straightforward here, the more useful comparison is between the tire series and their supporting specifications. A buyer choosing tires for appearance and road manners should still verify wheel width and overall setup, because the visual presentation may stay consistent while the underlying tire characteristics differ.
What tire series are available for the 1998 Jaguar XJR?
The 1998 Jaguar XJR has 255/40R18 options in several BFGoodrich g-Force series, including g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. All are radial blackwall tires in the same general size family, but they are distinct series rather than the same tire under different names.
That makes series comparison an important part of shopping for this Jaguar. Looking at the exact series helps separate one product from another when the size remains constant. It is also helpful to compare rim-width range, weight, and any stated load capacity so the tire choice aligns with the car's wheel setup and expected use.
Restoration & Appearance
Which tire should I choose for a period-style 1998 Jaguar XJR?
A period-style approach for a 1998 Jaguar XJR starts with staying in the correct 255/40R18 radial size on the proper 18-inch wheel. Because this is a modern performance-luxury sedan rather than an earlier bias-ply-era car, the appearance decision is mostly about retaining the correct modern profile and a clean blackwall presentation.
The available BFGoodrich g-Force series keep the visual character appropriate to the era while still giving you product-level choices within the correct fitment. For a restoration where originality matters closely, it is worth checking marque references and the car's own history, since period-style and exact as-delivered tire branding are not always the same thing.
Does correct tire fitment matter for a 1998 Jaguar XJR restoration?
Yes, correct tire fitment matters on a 1998 Jaguar XJR restoration because the tire size plays a major role in how the car sits, fills the wheel opening, and responds on the road. Using the proper 255/40R18 radial fitment helps preserve the XJR's intended balance of luxury-sedan composure and performance character.
Fitment accuracy also affects practical restoration results beyond appearance alone. An incorrect size can complicate wheel compatibility, clearance, and overall presentation even if it looks close at first glance. On a car from this era, maintaining the right modern tire format is usually more important than chasing a decorative sidewall style that was never part of the package.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1998 Jaguar XJR?
Yes. A 1998 Jaguar XJR may start with a 255/40R18 radial fitment, but wheel changes, suspension alterations, ride-height adjustments, and body modifications can all affect whether that same size still works the way it should on the car.
A Jaguar with aftermarket wheels needs more than a quick diameter check. Wheel width, offset, steering clearance, and fender clearance all deserve attention before replacement tires are chosen. Even when the size printed on the sidewall matches, a modified setup can change how the tire sits and behaves under cornering, braking, and normal suspension travel.
What should I inspect before driving a 1998 Jaguar XJR on new tires?
Before putting a 1998 Jaguar XJR back on the road with new tires, inspect the wheels for damage, confirm the wheel size and width, and make sure the tires are mounted in the correct 255/40R18 fitment. Tire pressure, valve condition, and basic alignment condition also deserve attention before regular driving begins.
A road test should follow a careful visual check of suspension and steering components, especially on a high-performance luxury sedan that may have seen long storage or intermittent use. Watch for rubbing, vibration, pull, or unusual wear patterns early. Catching those issues quickly helps protect the new tires and keeps the car driving as intended.
How often should tires on a 1998 Jaguar XJR be inspected?
Tires on a 1998 Jaguar XJR should be inspected regularly, not just when tread looks worn. A performance-oriented sedan that is driven occasionally can still develop age-related problems such as cracking, air loss, flat spotting, or damage that is easy to miss if the car spends long periods parked.
A good routine is to check the tires before longer drives and to give them a visual inspection during normal maintenance intervals. Pay attention to sidewalls, tread surface, inflation, and any signs of uneven wear. Storage conditions matter too, since heat, sunlight, and long idle periods can shorten tire life even on a well-kept collector vehicle.
