Jaguar XK Convertible (2007) Wheel Fitment
Jaguar XK Convertible (2007): 5x108 bolt pattern, 63.4mm center bore, OE F 18x8.5J ET49 / R 18x9.5J ET46. Forged wheel fitment specs from ANKUSI.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 19x9J ET40 / R 19x10.5J ET38 |
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 XK Convertible ships from the factory on a 5x108 bolt pattern with a 63.4mm center bore and a F 18x8.5J ET49 / R 18x9.5J ET46 wheel. Our flush reference for the Jaguar XK Convertible is F 19x9J ET40 / R 19x10.5J ET38.; our maximum aggressive reference is F 20x9.5J ET35 / R 20x11J ET35. — beyond that, expect clearance issues against the fender liner without further modification.
Jaguar XK Convertible OE Wheel Specs
The Jaguar XK Convertible ships from the factory on 5x108 bolt pattern wheels with a 63.4mm center bore. The stock wheel size is F 18x8.5J ET49 / R 18x9.5J ET46, 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.
Flush Fitment
For a flush look without any body modification, most Jaguar XK Convertible owners run F 19x9J ET40 / R 19x10.5J ET38. This setup tucks the wheel face closer to the fender lip while staying within safe load and clearance limits.
Maximum Aggressive Fitment
Owners chasing a more aggressive stance push to F 20x9.5J ET35 / R 20x11J ET35. Chassis: Lowering springs. Tires: 245/45 R18 F, 275/40 R18 R. Clearance should be verified before ordering, especially on lowered cars.
5-Tier Configuration Options
A – Factory-Style: 18x8.5J ET49
Recommended setup: Factory-matched forged replacement
Economy impact: None
Best for: Daily drivers, warranty-conscious owners
Appearance 5/10 | Comfort 10/10 | Install difficulty ★☆☆☆
Estimated cost range: $$ (OE replacement)
B – Comfortable Upgrade: F 18.5x9J ET45 / R 18.5x10J ET42
Recommended setup: Direct bolt-on, factory suspension
Economy impact: Minimal
Best for: Owners who want a mild upgrade with no compromise
Appearance 6/10 | Comfort 9/10 | Install difficulty ★☆☆☆
Estimated cost range: $$ - $$$
C – Balanced / Flush Fit: F 19x9J ET40 / R 19x10.5J ET38
Recommended setup: Flush forged wheels, stock or mild lowering
Economy impact: Slight increase
Best for: Enthusiasts wanting a flush look daily
Appearance 8/10 | Comfort 7/10 | Install difficulty ★★☆☆
Estimated cost range: $$$
D – Aggressive: F 19.5x9.5J ET38 / R 19.5x11J ET37
Recommended setup: Wider forged wheels, coilovers or lowering springs
Economy impact: Noticeable increase
Best for: Show-and-drive builds
Appearance 9/10 | Comfort 5/10 | Install difficulty ★★★☆
Estimated cost range: $$$$
E – Max Aggressive: F 20x9.5J ET35 / R 20x11J ET35
Recommended setup: Chassis: Lowering springs. Tires: 245/45 R18 F, 275/40 R18 R.
Economy impact: Significant increase
Best for: Show builds, weekend cars
Appearance 10/10 | Comfort 3/10 | Install difficulty ★★★★
Estimated cost range: $$$$$
Performance Comparison Matrix
| Wheel Spec | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 18x8.5J ET49 | F 18.5x9J ET45 / R 18.5x10J ET42 | F 19x9J ET40 / R 19x10.5J ET38 | F 19.5x9.5J ET38 / R 19.5x11J ET37 | F 20x9.5J ET35 / R 20x11J ET35 |
| Economy Impact | None | Minimal | Slight increase | Noticeable increase | Significant increase |
| Appearance | 5/10 | 6/10 | 8/10 | 9/10 | 10/10 |
| Comfort | 10/10 | 9/10 | 7/10 | 5/10 | 3/10 |
| Install Difficulty | ★☆☆☆ | ★☆☆☆ | ★★☆☆ | ★★★☆ | ★★★★ |
| Cost Range | $$ (OE replacement) | $$ - $$$ | $$$ | $$$$ | $$$$$ |
| Best For | Daily drivers, warranty-conscious owners | Owners who want a mild upgrade with no compromise | Enthusiasts wanting a flush look daily | Show-and-drive builds | Show builds, weekend cars |
Real-World Reference Cases
The following builds are compiled from typical ANKUSI customer configurations for this platform and are illustrative, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Commuter prioritizing comfort and reliability.
Setup: F 18x8.5J ET49 / R 18x9.5J ET46 forged wheels, factory suspension.
Cost: $$ (OE replacement)
Outcome: No clearance issues, factory ride quality retained.
Case 2: Balanced Enthusiast (Balanced / Flush Fit)
Profile: Weekend driver wanting a flush stance without sacrificing daily usability.
Setup: F 19x9J ET40 / R 19x10.5J ET38 forged wheels.
Cost: $$$
Outcome: Flush fitment with acceptable ride comfort for daily use.
Case 3: Show Build (Max Aggressive)
Profile: Show-and-shine build prioritizing stance over comfort.
Setup: F 20x9.5J ET35 / R 20x11J ET35 forged wheels. Chassis: Lowering springs. Tires: 245/45 R18 F, 275/40 R18 R.
Cost: $$$$$
Outcome: Maximum aggressive stance; clearance verified case-by-case.
Decision Guide
Offset & Backspacing Reference
Backspacing is calculated as: wheel width (in) / 2 + offset (mm) / 25.4 + 0.5.
- OE 18x8.5J ET49: backspacing ≈ 6.68"
- Flush 19x9J ET40: backspacing ≈ 6.57"
- Max 20x9.5J ET35: backspacing ≈ 6.63"
Use our offset & backspacing calculator to fine-tune your fitment, or contact ANKUSI for a custom forged wheel quote for your Jaguar XK Convertible.