🏁 Porsche 718 Cayman GT4 RS Tyre Size, Wheel Specs, PCD, Centre Bore & Torque Guide

🔧 Vehicle Overview

The Porsche 718 Cayman GT4 RS is the most extreme Cayman ever produced, featuring a GT3-derived 4.0L engine, advanced aerodynamics, and track-focused chassis tuning. Built for serious performance, it demands high-end tyre selection to match its capability.

✔ Naturally aspirated GT3 engine
✔ Motorsport aero & suspension
✔ Lightweight construction
✔ Track-first engineering

Tyres are critical for grip, braking, and stability at high speeds.

📊 Factory Wheel & Fitment Specifications

🔩 Core Fitment Data (Cayman GT4 RS)

• Bolt Pattern (PCD): 5×130

• Centre Bore: 71.6 mm

• Wheel Bolt Thread: M14 × 1.5

• Wheel Nut Torque (5-stud): 160 Nm (118 ft-lb)

⚠️ Most GT4 RS models use centre-lock wheels
→ Requires special Porsche torque tool

🛞 Factory Wheel Sizes & Offsets

🔹 Porsche 718 Cayman GT4 RS

📌 Wider than standard GT4, optimised for track performance

📏 Factory Tyre Sizes

🔹 OEM Tyre Setup

• Front: 245/35R20

• Rear: 295/30R20

📌 Identical sizing to GT4 but with higher performance tyre compounds

⚙️ Recommended Tyres (Australia)

🏁 Factory / Track-Focused (PRIMARY)

• Michelin Pilot Sport Cup 2 (N-rated)

• Michelin Pilot Sport Cup 2 R

✔ Maximum dry grip
✔ Track-ready performance

🔥 Street + Track Balance (Limited Use)

• Michelin Pilot Sport 4S

✔ Better wet performance
✔ Usable on public roads

⚠️ Comfort Tyres (NOT RECOMMENDED)

• MC7 / touring tyres
  ❌ Not suitable for GT4 RS
  ❌ Compromises safety and handling

⚙️ Aftermarket Upgrade Guide

✔ OEM+ Track Setup (Recommended)

• 245/35R20 + 295/30R20
  ✔ Maintains Porsche tuning

✔ Maximum Track Performance

• Cup 2 R
  ✔ Ultimate grip

✔ Street Setup (Limited)

• PS4S
  ✔ Only for daily-driven vehicles

⚠️ Critical Fitment Notes

• GT4 RS is extremely sensitive to tyre setup

• Staggered setup = NO front-to-rear rotation

✔ Track tyres require:

• Warm-up before driving hard

• Proper pressure management

❌ Incorrect tyres will:

• Reduce grip

• Affect aero balance

• Increase braking distance

✔ Always use N-rated tyres

🛠️ Torque & Installation Guide

🔧 5-Stud Wheels

• Torque: 160 Nm

🔧 Centre-Lock Wheels (Most GT4 RS Models)

• Requires special tool

• Significantly higher torque (manufacturer spec required)

✔ Re-torque after 50–100 km

🏪 Why Choose Autosport Tyreworld?

At Autosport Tyreworld, we specialise in GT and RS Porsche models:

✔ GT4 RS & GT3 RS tyre expertise
✔ Porsche-approved tyre options
✔ Premium brands: Michelin, Pirelli, Continental
✔ Precision balancing & performance alignment

📍 Visit Our Stores

AUTOSPORT TYREWORLD

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📞 0452 641 023

📍 411 Grand Junction Road, Wingfield SA 5013
📞 0433 645 411

📍 911 South Road, Clarence Gardens SA 5039
📞 0420 299 911