Mercedes-Benz AMG GT R F1 Safety Car (2018) Wheel Fitment
Mercedes-Benz AMG GT R F1 Safety Car (2018): 5x112 bolt pattern, 66.6mm center bore, OE F 19x10J ET56 / R 20x12J ET40. Forged wheel fitment specs from ANKUSI.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 20x10.5J ET25 / R 20x12.5J ET35 |
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
Most of the engineering value in a forged wheel over a cast one shows up in rotational mass, not outright strength — both can meet the same load rating, but the forged piece gets there lighter. On a sedan platform tuned for everyday balance, that weight saving is felt directly in steering response and ride quality.
The Mercedes-Benz AMG GT R F1 Safety Car ships from the factory on a 5x112 bolt pattern with a 66.6mm center bore and a F 19x10J ET56 / R 20x12J ET40 wheel. Our flush reference for the Mercedes-Benz AMG GT R F1 Safety Car is F 20x10.5J ET25 / R 20x12.5J ET35.; our maximum aggressive reference is F 20x11J ET20 / R 20x13J ET30. — beyond that, expect clearance issues against the fender liner without further modification.
Mercedes-Benz AMG GT R F1 Safety Car OE Wheel Specs
The Mercedes-Benz AMG GT R F1 Safety Car ships from the factory on 5x112 bolt pattern wheels with a 66.6mm center bore. The stock wheel size is F 19x10J ET56 / R 20x12J ET40, 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 Mercedes-Benz AMG GT R F1 Safety Car owners run F 20x10.5J ET25 / R 20x12.5J ET35. 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 20x11J ET20 / R 20x13J ET30. FIA safety car spec suspension; 19/20-inch forged wheels; AMG Carbon-Ceramic brakes; Pirelli P Zero official F1 tires. Note: Official Formula 1 safety car configuration based on the hardcore GT R. Clearance should be verified before ordering, especially on lowered cars.
5-Tier Configuration Options
A – Factory-Style: 19x10J ET56
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: $$ (OE replacement)
B – Comfortable Upgrade: F 19.5x10.5J ET30 / R 20x12.5J ET38
Recommended setup: Direct bolt-on, factory suspension
Economy impact: Minimal
Best for: Owners who want a mild upgrade with no compromise
Appearance 6/10 | Comfort 9/10 | Install difficulty ★☆☆☆
Estimated cost range: $$ - $$$
C – Balanced / Flush Fit: F 20x10.5J ET25 / R 20x12.5J ET35
Recommended setup: Flush forged wheels, stock or mild lowering
Economy impact: Slight increase
Best for: Enthusiasts wanting a flush look daily
Appearance 8/10 | Comfort 7/10 | Install difficulty ★★☆☆
Estimated cost range: $$$
D – Aggressive: F 20x11J ET23 / R 20x13J ET33
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: $$$$
E – Max Aggressive: F 20x11J ET20 / R 20x13J ET30
Recommended setup: FIA safety car spec suspension; 19/20-inch forged wheels; AMG Carbon-Ceramic brakes; Pirelli P Zero official F1 tires. Note: Official Formula 1 safety car configuration based on the hardcore GT R.
Economy impact: Significant increase
Best for: Show builds, weekend cars
Appearance 10/10 | Comfort 3/10 | Install difficulty ★★★★
Estimated cost range: $$$$$
Performance Comparison Matrix
| Wheel Spec | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 19x10J ET56 | F 19.5x10.5J ET30 / R 20x12.5J ET38 | F 20x10.5J ET25 / R 20x12.5J ET35 | F 20x11J ET23 / R 20x13J ET33 | F 20x11J ET20 / R 20x13J ET30 |
| Economy Impact | None | Minimal | Slight increase | Noticeable increase | Significant increase |
| Appearance | 5/10 | 6/10 | 8/10 | 9/10 | 10/10 |
| Comfort | 10/10 | 9/10 | 7/10 | 5/10 | 3/10 |
| Install Difficulty | ★☆☆☆ | ★☆☆☆ | ★★☆☆ | ★★★☆ | ★★★★ |
| Cost Range | $$ (OE replacement) | $$ - $$$ | $$$ | $$$$ | $$$$$ |
| Best For | Daily drivers, warranty-conscious owners | Owners who want a mild upgrade with no compromise | Enthusiasts wanting a flush look daily | Show-and-drive builds | Show builds, weekend cars |
Real-World Reference Cases
The following builds are compiled from typical ANKUSI customer configurations for this platform and are illustrative, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Commuter prioritizing comfort and reliability.
Setup: F 19x10J ET56 / R 20x12J ET40 forged wheels, factory suspension.
Cost: $$ (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 20x10.5J ET25 / R 20x12.5J ET35 forged wheels.
Cost: $$$
Outcome: Flush fitment with acceptable ride comfort for daily use.
Case 3: Show Build (Max Aggressive)
Profile: Show-and-shine build prioritizing stance over comfort.
Setup: F 20x11J ET20 / R 20x13J ET30 forged wheels. FIA safety car spec suspension; 19/20-inch forged wheels; AMG Carbon-Ceramic brakes; Pirelli P Zero official F1 tires. Note: Official Formula 1 safety car configuration based on the hardcore GT R.
Cost: $$$$$
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 19x10J ET56: backspacing ≈ 7.70"
- Flush 20x10.5J ET25: backspacing ≈ 6.73"
- Max 20x11J ET20: backspacing ≈ 6.79"
Use our offset & backspacing calculator to fine-tune your fitment, or contact ANKUSI for a custom forged wheel quote for your Mercedes-Benz AMG GT R F1 Safety Car.
Frequently Asked Questions
What bolt pattern (PCD) does the Mercedes-Benz AMG GT R F1 Safety Car use?
How many lug bolts does the Mercedes-Benz AMG GT R F1 Safety Car use?
What does a flush wheel fitment look like on the Mercedes-Benz AMG GT R F1 Safety Car?
Do I need wheel spacers for my Mercedes-Benz AMG GT R F1 Safety Car?
How do I calculate wheel backspacing for my Mercedes-Benz AMG GT R F1 Safety Car?
What's the difference between wheel offset and backspacing?
Can I run staggered wheels (different sizes front and rear) on my Mercedes-Benz AMG GT R F1 Safety Car?
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M14x1.5, ball-seat lug bolt.
Factory Torque Spec: 130 Nm (96 ft-lb). Sedan/coupe platforms (E-Class, CLS, SL and similar) generally use the shorter 27mm bolt at this spec.
TPMS: TPMS (Tire Pressure Monitoring System) has been federally mandated on all new light vehicles sold in the US since the 2008 model year. If your wheels use OE-style sensors, have them transferred or cloned to the new wheels at installation.
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.