Ford GT40 Concept (2002) Wheel Fitment
Ford GT40 Concept (2002): 5x114.3 bolt pattern, 70.5mm center bore, OE F 18x8.5J ET42 / R 19x10J ET50. Forged wheel fitment specs from ANKUSI.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 19x9J ET35 / R 20x11J ET42 |
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
On a supercar, wheel weight is one of the few remaining places to cut rotational mass without touching the powertrain or chassis the factory already optimized. Forging gets there at the same structural margin as the OE wheel, which is exactly the trade a car built around outright performance rewards.
The Ford GT40 Concept ships from the factory on a 5x114.3 bolt pattern with a 70.5mm center bore and a F 18x8.5J ET42 / R 19x10J ET50 wheel. Our flush reference for the Ford GT40 Concept is F 19x9J ET35 / R 20x11J ET42.; our maximum aggressive reference is F 19x9.5J ET30 / R 20x11.5J ET38. — beyond that, expect clearance issues against the fender liner without further modification.
Ford GT40 Concept OE Wheel Specs
The Ford GT40 Concept ships from the factory on 5x114.3 bolt pattern wheels with a 70.5mm center bore. The stock wheel size is F 18x8.5J ET42 / R 19x10J ET50, 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 Ford GT40 Concept owners run F 19x9J ET35 / R 20x11J ET42. 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 19x9.5J ET30 / R 20x11.5J ET38. Multimatic prototype suspension; custom 18/19-inch knock-off wheels; Brembo brakes; Goodyear Eagle F1 tires. Clearance should be verified before ordering, especially on lowered cars.
5-Tier Configuration Options
A – Factory-Style: 18x8.5J ET42
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: $$ (OE replacement)
B – Comfortable Upgrade: F 18.5x9J ET39 / R 19.5x10.5J ET46
Recommended setup: Direct bolt-on, factory suspension
Economy impact: Minimal
Best for: Owners who want a mild upgrade with no compromise
Appearance 6/10 | Comfort 9/10 | Install difficulty ★☆☆☆
Estimated cost range: $$ - $$$
C – Balanced / Flush Fit: F 19x9J ET35 / R 20x11J ET42
Recommended setup: Flush forged wheels, stock or mild lowering
Economy impact: Slight increase
Best for: Enthusiasts wanting a flush look daily
Appearance 8/10 | Comfort 7/10 | Install difficulty ★★☆☆
Estimated cost range: $$$
D – Aggressive: F 19x9.5J ET33 / R 20x11.5J ET40
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: $$$$
E – Max Aggressive: F 19x9.5J ET30 / R 20x11.5J ET38
Recommended setup: Multimatic prototype suspension; custom 18/19-inch knock-off wheels; Brembo brakes; Goodyear Eagle F1 tires.
Economy impact: Significant increase
Best for: Show builds, weekend cars
Appearance 10/10 | Comfort 3/10 | Install difficulty ★★★★
Estimated cost range: $$$$$
Performance Comparison Matrix
| Wheel Spec | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 18x8.5J ET42 | F 18.5x9J ET39 / R 19.5x10.5J ET46 | F 19x9J ET35 / R 20x11J ET42 | F 19x9.5J ET33 / R 20x11.5J ET40 | F 19x9.5J ET30 / R 20x11.5J ET38 |
| Economy Impact | None | Minimal | Slight increase | Noticeable increase | Significant increase |
| Appearance | 5/10 | 6/10 | 8/10 | 9/10 | 10/10 |
| Comfort | 10/10 | 9/10 | 7/10 | 5/10 | 3/10 |
| Install Difficulty | ★☆☆☆ | ★☆☆☆ | ★★☆☆ | ★★★☆ | ★★★★ |
| Cost Range | $$ (OE replacement) | $$ - $$$ | $$$ | $$$$ | $$$$$ |
| Best For | Daily drivers, warranty-conscious owners | Owners who want a mild upgrade with no compromise | Enthusiasts wanting a flush look daily | Show-and-drive builds | Show builds, weekend cars |
Real-World Reference Cases
The following builds are compiled from typical ANKUSI customer configurations for this platform and are illustrative, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Commuter prioritizing comfort and reliability.
Setup: F 18x8.5J ET42 / R 19x10J ET50 forged wheels, factory suspension.
Cost: $$ (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 ET35 / R 20x11J ET42 forged wheels.
Cost: $$$
Outcome: Flush fitment with acceptable ride comfort for daily use.
Case 3: Show Build (Max Aggressive)
Profile: Show-and-shine build prioritizing stance over comfort.
Setup: F 19x9.5J ET30 / R 20x11.5J ET38 forged wheels. Multimatic prototype suspension; custom 18/19-inch knock-off wheels; Brembo brakes; Goodyear Eagle F1 tires.
Cost: $$$$$
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 ET42: backspacing ≈ 6.4"
- Flush 19x9J ET35: backspacing ≈ 6.38"
- Max 19x9.5J ET30: backspacing ≈ 6.43"
Use our offset & backspacing calculator to fine-tune your fitment, or contact ANKUSI for a custom forged wheel quote for your Ford GT40 Concept.
Frequently Asked Questions
What bolt pattern (PCD) does the Ford GT40 Concept use?
How many lug bolts does the Ford GT40 Concept use?
What does a flush wheel fitment look like on the Ford GT40 Concept?
Do I need wheel spacers for my Ford GT40 Concept?
How do I calculate wheel backspacing for my Ford GT40 Concept?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Ford GT40 Concept?
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M12x1.5, conical-seat lug nut.
Factory Torque Spec: 136 Nm (100 ft-lb). Covers most Ford passenger cars and crossovers (Fusion, Focus, Escape and similar) on M12x1.5 studs.
TPMS: Vehicles built before the 2008 model year were not federally required to carry factory TPMS in the US, though many manufacturers adopted it earlier; verify whether your specific build has TPMS before ordering sensor-compatible wheels.
Tire Pressure: Always set tire pressure to the value on your vehicle's tire placard (driver's doorjamb or glovebox), not the max PSI printed on the tire sidewall — this is trim- and tire-size-specific and stays the same reference point when you switch to a different wheel and tire combination.
Reference data compiled from published OEM service specifications and cross-checked against independent repair sources; always confirm against your owner's manual or door-jamb placard before installation.