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2005 Jaguar XK8 Convertible Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Jaguar XK8 Convertible wheels? This page gives the 2005 Jaguar XK8 Convertible bolt pattern (5x120.65), centre bore, factory rim size and the offset range for aftermarket and forged Jaguar XK8 Convertible rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2005 Jaguar XK8 Convertible uses a 5x120.65 bolt pattern with a 73.8 mm centre bore and M12x1.5 lug nuts. For aftermarket wheels, 18x8.5J ET25 front / 18x9.5J ET28 rear sits flush.
Forged wheels for the 2005 Jaguar XK8 Convertible — drilled 5x120.65 with a 73.8 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Jaguar XK8 Convertible (2005): 5x120.65 bolt pattern, 73.8mm center bore, OE F 17x8J ET33 / R 17x9J ET35. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x120.65
Wheel Bolt/NutM12x1.5 Nut
Center Bore73.8mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Year2005
Category5-Lug Performance / Tuner
Data check: the bolt pattern and center bore on this page have not yet been confirmed by a second independent source. Measure your hub or ask us before ordering. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 18x8.5J ET25 / R 18x9.5J ET28 |
Forged Wheel Designs for the Jaguar XK8 Convertible
Every design below is forged to order, so it can be machined to the Jaguar XK8 Convertible's 5x120.65 bolt pattern and 73.8 mm center bore, with the width and offset calculated for your setup.
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How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
Convertibles lose some of the structural rigidity a fixed roof provides, which means the suspension and wheels end up doing more of the work to keep the chassis composed. A forged wheel keeps unsprung mass down without sacrificing the strength margin the factory built in — useful on a platform that's already managing extra flex.
The Jaguar XK8 Convertible ships from the factory on a 5x120.65 bolt pattern with a 73.8mm center bore and a F 17x8J ET33 / R 17x9J ET35 wheel. Our flush reference for the Jaguar XK8 Convertible is F 18x8.5J ET25 / R 18x9.5J ET28.; our maximum aggressive reference is F 19x9J ET20 / R 19x10J ET25. — beyond that, expect clearance issues against the fender liner without further modification.
Jaguar XK8 Convertible OE Wheel Specs
The Jaguar XK8 Convertible ships from the factory on 5x120.65 bolt pattern wheels with a 73.8mm center bore. The stock wheel size is F 17x8J ET33 / R 17x9J ET35, offering a balanced ride that suits most owners without any rubbing or clearance concerns.
Why the factory spec works for most owners:
- Balances ride comfort with steering response and highway efficiency.
- Wide tire and wheel availability at the factory diameter keeps replacement costs low.
- Lower unsprung weight than larger aftermarket wheels helps ride quality and acceleration.
- Guaranteed clearance against brake calipers and suspension components.
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Jaguar XK8 Convertible (2005) we drill the 5x120.65 pattern and cut the centre bore to 73.8mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset and Backspacing: Factory Wheel vs Options
Backspacing ≈ width/2 + ET/25.4 + 0.5 in. "Inward" means closer to the suspension; "outward" means closer to the fender lip.
| Setup | Size | ET | Backspacing | Inward vs OE | Outward vs OE |
|---|---|---|---|---|---|
| Factory (OE) | 17x8J | ET33 | 5.80 in (147 mm) | — | — |
| Flush | 18x8.5J | ET25 | 5.73 in (146 mm) | −2 mm | +14 mm |
| Maximum | 19x9J | ET20 | 5.79 in (147 mm) | 0 mm | +26 mm |
Vehicles With the Same Hub as the Jaguar XK8 Convertible (5x120.65, 73.8 mm Bore)
In our database, 25 other vehicle entries from 2 makes use exactly the same 5x120.65 bolt pattern and 73.8 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
5x120.65 is used by 1.6% of the vehicle pages in our English fitment guide (101 of 6,503); 25.7% of those also use a 73.8 mm center bore.
Hub-Centric Rings for a 73.8 mm Center Bore
A wheel with a center bore larger than 73.8 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 74.1 mm | 74.1 → 73.8 mm |
| 76.1 mm | 76.1 → 73.8 mm |
| 78.1 mm | 78.1 → 73.8 mm |
| 84.1 mm | 84.1 → 73.8 mm |
ANKUSI forged wheels are bored to exactly 73.8 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Jaguar XK8 Convertible use?
The 2005 Jaguar XK8 Convertible uses a 5x120.65 bolt pattern.
How many lug bolts does the Jaguar XK8 Convertible use?
The Jaguar XK8 Convertible uses a 5-lug bolt pattern (5x120.65), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Jaguar XK8 Convertible?
The Jaguar XK8 Convertible's center bore is 73.8mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What does a flush wheel fitment look like on the Jaguar XK8 Convertible?
For a flush look with minimal to no rubbing, we recommend F 18x8.5J ET25 / R 18x9.5J ET28 as a starting point on a stock or mildly lowered Jaguar XK8 Convertible.
Do I need wheel spacers for my Jaguar XK8 Convertible?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Jaguar XK8 Convertible?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 5.73" backspacing up front and 6.35" in the rear.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Jaguar XK8 Convertible?
Yes — the Jaguar XK8 Convertible's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
Sources and Last Update
Data checked against: avtoreference.com, tirewheelguide.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 17x8 wheels · 17 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Bolt pattern and center bore on this page come from published fitment references and are still awaiting a second independent check. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.