🚗 Porsche 911 Targa 4 GTS Tyre Size, Wheel Specs, PCD, Centre Bore & Torque Guide
🔧 Vehicle Overview
The Porsche 911 Targa 4 GTS blends open-top luxury with GTS-level performance and AWD traction. Positioned above the Targa 4S, it features wider rear tyres, sport-tuned suspension, and higher-performance tyre compounds, making correct tyre selection critical for both performance and drivetrain reliability.
📊 Factory Wheel & Fitment Specifications
🔩 Core Fitment Data (Targa 4 GTS – All Generations)
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Bolt Pattern (PCD): 5×130
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Centre Bore: 71.6 mm
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Wheel Bolt Thread: M14 × 1.5
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Wheel Nut Torque: 160 Nm (118 ft-lb)
✅ Same across 991 & 992 Targa 4 GTS models
🛞 Factory Wheel Sizes & Offsets
🔹 Porsche 991 Targa 4 GTS
| Position | Wheel Size | Offset |
|---|---|---|
| Front | 20x8.5 | ET49 |
| Rear | 20x11 | ET66 |
🔹 Porsche 992 Targa 4 GTS
| Position | Wheel Size | Offset |
|---|---|---|
| Front | 20x8.5 | ET50 |
| Rear | 21x11.5 | ET67 |
📌 GTS models may come with centre-lock wheels (optional) and lightweight alloys.
📏 Factory Tyre Sizes
🔹 Porsche 991 Targa 4 GTS
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Front: 245/35R20
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Rear: 305/30R20
🔹 Porsche 992 Targa 4 GTS
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Front: 245/35R20
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Rear: 305/30R21
📌 Factory tyres are typically Michelin PS4S or optional Cup 2 (track-focused).
⚙️ AWD Tyre Matching (CRITICAL)
The AWD system requires precise tyre matching:
✔ Same tyre brand front & rear
✔ Same tread pattern
✔ Similar tread depth (within 2–3mm)
✔ Correct rolling diameter
❌ Incorrect tyre combinations can cause:
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AWD system damage
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Transfer case wear
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Warning lights
⚙️ Recommended Tyres (Australia)
🔥 Best Daily Performance
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Michelin Pilot Sport 4S (N-rated)
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Continental SportContact 7
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Pirelli P Zero (PZ4 Porsche spec)
✔ Excellent grip in all conditions
✔ Ideal for AWD performance
🏁 Track / GTS Driving
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Michelin Pilot Sport Cup 2
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Pirelli Trofeo R
✔ Maximum grip
✔ Faster wear
🔇 Comfort Option (Daily Driving)
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Continental MaxContact MC7
✔ Lower noise
✔ Better comfort
✔ Suitable for non-track drivers
⚙️ Aftermarket Upgrade Guide
✔ OEM+ Setup (Recommended)
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245/35R20 + 305/30R20/21
✔ Maintains AWD system balance
✔ Comfort Setup
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Same sizes with touring tyre
✔ Reduced noise
✔ Longer lifespan
✔ Performance Setup
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PS4S / SportContact 7
✔ Best balance of performance + durability
⚠️ Critical Fitment Notes
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AWD requires perfect tyre matching
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Always replace tyres as a full set (recommended)
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Staggered setup = NO front-to-rear rotation
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Incorrect sizing affects:
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AWD system
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Porsche Stability Management (PSM)
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Always recommend N-rated tyres
🛠️ Torque & Installation Guide
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Torque Spec: 160 Nm
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Re-torque after 50–100 km
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Always use torque wrench (essential for Porsche wheels)
🏪 Why Choose Autosport Tyreworld?
At Autosport Tyreworld, we specialise in Porsche AWD performance vehicles:
✔ Correct AWD tyre matching expertise
✔ Porsche-approved tyre options
✔ Premium brands: Michelin, Continental, Pirelli
✔ Precision balancing & performance alignment
📍 Visit Our Stores
AUTOSPORT TYREWORLD
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📞 0452 641 023
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📍 911 South Road, Clarence Gardens SA 5039
📞 0420 299 911