The 1999 Jaguar XK8 arrived as a refined grand touring coupe and convertible, blending modern Jaguar styling with the smooth, long-hood character buyers expected from the XK line. It sits in that late-1990s luxury performance space where ride quality, balance, and appearance all matter just as much as outright grip. For this exact 1999 Jaguar XK8 fitment, the primary tire size is 245/50R17, a radial on a 17-inch rim. That keeps the tire decision centered on choosing the right modern metric radial in the proper size rather than sorting through multiple original-style constructions. For an XK8 owner, the key is matching the car's touring character with the right fit, condition, and road-use readiness.
Which Tire Size Is Right for The 1999 Jaguar XK8
The 1999 Jaguar XK8 uses one primary tire size: 245/50R17 radial on a 17-inch rim. The 1999 Jaguar XK8 Base uses that same fitment, so the main decision is not which size applies, but which tire within that size best suits the car's road use, wheel setup, and overall condition.
245/50R17 is a modern metric radial size where 245 identifies the nominal section width in millimeters, 50 is the aspect ratio, R indicates radial construction, and 17 is the rim diameter in inches. On the 1999 Jaguar XK8, this size supports the car's late-1990s grand touring character and keeps the fitment in the radial format intended for this application. Because the size question is straightforward here, selection comes down to choosing a tire that matches the car's wheel dimensions, overall use, and condition. It is also wise to confirm the actual wheel setup first if the car has ever been modified.
Sub-model fitment for the 1999 Jaguar XK8 is straightforward. The covered XK8 sub-model uses the same primary tire size, so the focus stays on selecting the right 245/50R17 radial and confirming the car still has the correct 17-inch wheel setup.
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1999 Jaguar XK8 Base
The 1999 Jaguar XK8 Base uses the same 245/50R17 radial fitment as the core model. That keeps tire selection centered on choosing the right tire within that size and verifying that the wheels, suspension, and overall setup remain true to the car's intended fitment.
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.
Frequently Asked Questions
Common 1999 Jaguar XK8 tire questions usually come down to confirming the 245/50R17 fitment, understanding the 17-inch wheel requirement, and choosing a radial tire that suits the car's touring character, condition, and any wheel or suspension changes.
Tire Size & Fitment
What tire size fits a 1999 Jaguar XK8?
The 1999 Jaguar XK8 uses a 245/50R17 tire size. This is a radial fitment, and it is the primary size associated with the model for this year, including the XK8 Base sub-model.
That makes the size decision fairly simple, but the car still needs the correct 17-inch wheel setup to match. If the XK8 has aftermarket wheels or suspension changes, confirm wheel diameter and overall clearance before choosing a replacement tire in 245/50R17.
What size rim does a 1999 Jaguar XK8 use?
The 1999 Jaguar XK8 uses a 17-inch rim with its 245/50R17 tire size. The 17 at the end of the tire size marks the wheel diameter the tire is built to mount on.
Wheel diameter is only part of the fitment picture, so it is still smart to verify the actual wheels on the car before replacing tires. Width, offset, and any non-original wheel change can affect how a 245/50R17 tire sits in the fender opening and clears suspension components.
Does the 1999 Jaguar XK8 Base use the same tire size?
Yes. The 1999 Jaguar XK8 Base uses the same 245/50R17 radial tire size as the main 1999 Jaguar XK8 fitment. There is no separate primary tire size to sort through for that covered sub-model.
That consistency helps narrow the decision to tire choice within the correct size rather than chasing different fitments by trim. Even so, a used XK8 should still be checked for replacement wheels, altered ride height, or clearance issues before installing a fresh set of 245/50R17 tires.
Choosing the Right Tire
What should I consider when choosing a 245/50R17 tire for a 1999 Jaguar XK8?
Start with the correct size, which is 245/50R17, and make sure the tire is intended for a 17-inch wheel. On a 1999 Jaguar XK8, the right choice should also match the car's grand touring use, whether that means regular road driving, lower annual mileage, or occasional fair-weather use.
Beyond size, compare the actual wheel setup, the condition of suspension and steering components, and the way the car is driven. An XK8 that still carries its original-style wheel dimensions presents a simpler tire decision than one with aftermarket wheels or changes that alter clearance.
How do I choose between available 245/50R17 tires for a 1999 Jaguar XK8?
The best starting point is to stay with the correct 245/50R17 size and then compare tires by how they suit the car's intended use. A 1999 Jaguar XK8 benefits from a tire choice that respects its balance of comfort, road manners, and upscale touring character.
A car driven occasionally may call for a different emphasis than one used more regularly on longer trips. It also helps to look at the full setup around the tire, including wheel dimensions, alignment condition, ride height, and any signs that the current tires have been rubbing or wearing unevenly.
What rim-fitment details should I compare when choosing tires for a 1999 Jaguar XK8?
The most important rim-fitment detail is the 17-inch wheel diameter required by the 245/50R17 tire size. After that, the wheel's actual width and offset deserve attention, especially on a car that may no longer have its original wheel package.
Those details influence how the tire sits on the wheel and how much room remains near the fenders and suspension. A 1999 Jaguar XK8 with replacement wheels can still use the correct tire size, but only after confirming the full wheel dimensions and checking for interference at full steering lock and suspension travel.
Restoration & Appearance
Which tire should I choose for a period-style 1999 Jaguar XK8?
A period-style approach for a 1999 Jaguar XK8 starts with the correct 245/50R17 radial size. Because this is a late-1990s luxury grand tourer, keeping the proper modern metric radial format preserves the visual balance and road-going character associated with the car's original era.
Appearance still needs to be matched with practical fitment. If originality matters at a higher level, check the car's wheel style, build history, and marque-specific references before making a final tire decision, especially if the XK8 has changed hands and may have received non-original wheels over time.
Does correct tire fitment matter for a 1999 Jaguar XK8 restoration?
Yes, correct tire fitment matters on a 1999 Jaguar XK8 restoration because tire size has a direct effect on stance, wheel presentation, and how the car looks in profile. Using the proper 245/50R17 size helps keep the finished vehicle aligned with the proportions intended for this model year.
Fitment also affects the restoration beyond appearance alone. A tire that does not match the wheel or chassis setup can create clearance issues, awkward visual gaps, or handling compromises, so the restoration process should include a close review of wheel diameter, wheel width, and the car's current suspension condition.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1999 Jaguar XK8?
Yes. Modifications can affect tire fitment on a 1999 Jaguar XK8 even when the nominal tire size remains 245/50R17. Aftermarket wheels, altered offset, suspension lowering, or body changes can all change how much room the tire has during steering and suspension movement.
That is why a modified XK8 should be inspected as an actual wheel-and-tire package rather than by size alone. Checking wheel dimensions, fender clearance, inner clearance, and signs of rubbing helps prevent fitment surprises when installing new tires on a car that no longer matches its original setup.
What should I inspect before driving a 1999 Jaguar XK8 on new tires?
Before driving a 1999 Jaguar XK8 on new tires, inspect the wheels for damage, confirm the tires are mounted in the correct 245/50R17 size, and check that inflation is set appropriately for the tire and vehicle setup. It also makes sense to look over alignment-related wear points and basic suspension condition.
A short visual check around the car can catch problems early. Look for limited clearance near the fenders, any contact at full steering lock, and signs of loose or worn steering and suspension parts that could affect how the new tires track and wear once the car is back on the road.
How often should tires on a 1999 Jaguar XK8 be inspected?
Tires on a 1999 Jaguar XK8 should be inspected regularly, especially if the car is driven infrequently or stored for long periods. Collector and occasional-use cars can develop age-related issues such as cracking, flat spotting, air loss, or hidden sidewall damage even when tread wear appears minimal.
A routine inspection should include tread condition, sidewalls, valve stems, and inflation pressure, along with a quick look for bulges, cuts, or uneven wear. Checking before longer drives is especially important on an older XK8, since long intervals between outings can hide problems that only show up once the car is moving again.
