Rinspeed Porsche Indy 4S 997 (2006) Wheel Fitment
Rinspeed Porsche Indy 4S 997 (2006): 5x130 bolt pattern, 71.6mm center bore, OE F 19x8.5J ET46 / R 19x11J ET46. Forged wheel fitment specs from ANKUSI.
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Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 20x9J ET45 / R 20x12J ET45 |
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 Rinspeed Porsche Indy 4S 997 ships from the factory on a 5x130 bolt pattern with a 71.6mm center bore and a F 19x8.5J ET46 / R 19x11J ET46 wheel. Our flush reference for the Rinspeed Porsche Indy 4S 997 is F 20x9J ET45 / R 20x12J ET45.; our maximum aggressive reference is F 20x9.5J ET40 / R 20x12J ET40. — beyond that, expect clearance issues against the fender liner without further modification.
Rinspeed Porsche Indy 4S 997 OE Wheel Specs
The Rinspeed Porsche Indy 4S 997 ships from the factory on 5x130 bolt pattern wheels with a 71.6mm center bore. The stock wheel size is F 19x8.5J ET46 / R 19x11J 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 Rinspeed Porsche Indy 4S 997 owners run F 20x9J ET45 / R 20x12J ET45. 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 ET40 / R 20x12J ET40. Rinspeed body styling and suspension tuning for the 997 Carrera 4S; Rinspeed Indy design alloy wheels. Note: High-quality Swiss tuner build for Porsche clients. Clearance should be verified before ordering, especially on lowered cars.
5-Tier Configuration Options
A – Factory-Style: 19x8.5J ET46
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: $$ (OE replacement)
B – Comfortable Upgrade: F 19.5x9J ET46 / R 19.5x11.5J ET46
Recommended setup: Direct bolt-on, factory suspension
Economy impact: Minimal
Best for: Owners who want a mild upgrade with no compromise
Appearance 6/10 | Comfort 9/10 | Install difficulty ★☆☆☆
Estimated cost range: $$ - $$$
C – Balanced / Flush Fit: F 20x9J ET45 / R 20x12J ET45
Recommended setup: Flush forged wheels, stock or mild lowering
Economy impact: Slight increase
Best for: Enthusiasts wanting a flush look daily
Appearance 8/10 | Comfort 7/10 | Install difficulty ★★☆☆
Estimated cost range: $$$
D – Aggressive: F 20x9.5J ET43 / R 20x12J ET43
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: $$$$
E – Max Aggressive: F 20x9.5J ET40 / R 20x12J ET40
Recommended setup: Rinspeed body styling and suspension tuning for the 997 Carrera 4S; Rinspeed Indy design alloy wheels. Note: High-quality Swiss tuner build for Porsche clients.
Economy impact: Significant increase
Best for: Show builds, weekend cars
Appearance 10/10 | Comfort 3/10 | Install difficulty ★★★★
Estimated cost range: $$$$$
Performance Comparison Matrix
| Wheel Spec | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | 19x8.5J ET46 | F 19.5x9J ET46 / R 19.5x11.5J ET46 | F 20x9J ET45 / R 20x12J ET45 | F 20x9.5J ET43 / R 20x12J ET43 | F 20x9.5J ET40 / R 20x12J ET40 |
| Economy Impact | None | Minimal | Slight increase | Noticeable increase | Significant increase |
| Appearance | 5/10 | 6/10 | 8/10 | 9/10 | 10/10 |
| Comfort | 10/10 | 9/10 | 7/10 | 5/10 | 3/10 |
| Install Difficulty | ★☆☆☆ | ★☆☆☆ | ★★☆☆ | ★★★☆ | ★★★★ |
| Cost Range | $$ (OE replacement) | $$ - $$$ | $$$ | $$$$ | $$$$$ |
| Best For | Daily drivers, warranty-conscious owners | Owners who want a mild upgrade with no compromise | Enthusiasts wanting a flush look daily | Show-and-drive builds | Show builds, weekend cars |
Real-World Reference Cases
The following builds are compiled from typical ANKUSI customer configurations for this platform and are illustrative, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Commuter prioritizing comfort and reliability.
Setup: F 19x8.5J ET46 / R 19x11J ET46 forged wheels, factory suspension.
Cost: $$ (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 20x9J ET45 / R 20x12J ET45 forged wheels.
Cost: $$$
Outcome: Flush fitment with acceptable ride comfort for daily use.
Case 3: Show Build (Max Aggressive)
Profile: Show-and-shine build prioritizing stance over comfort.
Setup: F 20x9.5J ET40 / R 20x12J ET40 forged wheels. Rinspeed body styling and suspension tuning for the 997 Carrera 4S; Rinspeed Indy design alloy wheels. Note: High-quality Swiss tuner build for Porsche clients.
Cost: $$$$$
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 19x8.5J ET46: backspacing ≈ 6.56"
- Flush 20x9J ET45: backspacing ≈ 6.77"
- Max 20x9.5J ET40: backspacing ≈ 6.82"
Use our offset & backspacing calculator to fine-tune your fitment, or contact ANKUSI for a custom forged wheel quote for your Rinspeed Porsche Indy 4S 997.