🏁 Porsche Cayman GT4 Tyre Size, Wheel Specs, PCD, Centre Bore & Torque Guide
🔧 Vehicle Overview
The Porsche Cayman GT4 is a track-focused variant of the Cayman, engineered with GT3-derived suspension, aerodynamics, and braking systems. Available in 981 GT4 (2015–2016) and 718 GT4 (2019+), it delivers:
✔ Motorsport-level handling
✔ Naturally aspirated flat-six performance
✔ Precision-focused chassis tuning
Tyres are critical, as the GT4 relies heavily on mechanical grip and track-ready performance.
📊 Factory Wheel & Fitment Specifications
🔩 Core Fitment Data (Cayman GT4)
-
Bolt Pattern (PCD): 5×130
-
Centre Bore: 71.6 mm
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Wheel Bolt Thread: M14 × 1.5
-
Wheel Nut Torque: 160 Nm (118 ft-lb)
⚠️ Some GT4 models (Clubsport variants) may use centre-lock wheels
🛞 Factory Wheel Sizes & Offsets
🔹 Porsche Cayman GT4 (981)
| Position | Wheel Size | Offset |
|---|---|---|
| Front | 20x8.5 | ET57 |
| Rear | 20x10.5 | ET45 |
🔹 Porsche 718 Cayman GT4
| Position | Wheel Size | Offset |
|---|---|---|
| Front | 20x9 | ET50 |
| Rear | 20x11 | ET50 |
📌 Wider setup on 718 GT4 for increased grip
📏 Factory Tyre Sizes
🔹 Cayman GT4 (981)
-
Front: 245/35R20
-
Rear: 295/30R20
🔹 Cayman GT4 (718)
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Front: 245/35R20
-
Rear: 295/30R20
📌 Same tyre sizes across both generations
⚙️ Recommended Tyres (Australia)
🏁 Track-Focused (Factory Style)
-
Michelin Pilot Sport Cup 2 (N-rated)
✔ Maximum dry grip
✔ OEM-style performance
🔥 Street + Track Balance (Most Popular)
-
Michelin Pilot Sport 4S
-
Continental SportContact 7
✔ Better wet grip
✔ Suitable for daily driving
🏁 Maximum Track Performance
-
Michelin Cup 2 R
✔ Extreme grip
✔ Track-only performance
🔇 Comfort Option (Limited Use)
-
Continental MaxContact MC7 (not typical for GT4)
✔ Lower noise
✔ Better ride comfort
⚙️ Aftermarket Upgrade Guide
✔ OEM+ Setup (Recommended)
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245/35R20 + 295/30R20
✔ Maintains factory balance
✔ Track Setup
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Cup 2 / Cup 2 R
✔ Maximum performance
✔ Street Setup
-
PS4S / SportContact 7
✔ Best all-round use
⚠️ Critical Fitment Notes
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GT4 is mid-engine → extremely sensitive to tyre balance
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Staggered setup = NO front-to-rear rotation
✔ Track tyres require:
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Proper warm-up
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Pressure monitoring
❌ Incorrect tyres will:
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Reduce cornering grip
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Affect braking and stability
✔ Always recommend N-rated tyres
🛠️ Torque & Installation Guide
-
Torque Spec: 160 Nm
Centre-Lock (if equipped):
-
Requires special tool
-
Higher torque (manufacturer spec required)
✔ Re-torque after 50–100 km
🏪 Why Choose Autosport Tyreworld?
At Autosport Tyreworld, we specialise in GT-level Porsche fitment:
✔ Cayman GT4 & GT3 expertise
✔ Porsche-approved tyre options
✔ Premium brands: Michelin, Continental, Pirelli
✔ Precision balancing & performance alignment
📍 Visit Our Stores
AUTOSPORT TYREWORLD
📍 647 Magill Road, Magill SA 5072
📞 0452 641 023
📍 411 Grand Junction Road, Wingfield SA 5013
📞 0433 645 411
📍 911 South Road, Clarence Gardens SA 5039
📞 0420 299 911