🚗 Porsche 911 GT3 Tyre Size, Wheel Specs, PCD, Centre Bore & Torque Guide

🔧 Vehicle Overview

The Porsche 911 GT3 is a track-focused performance machine, engineered for precision, aerodynamics, and maximum grip. Unlike Turbo or Carrera models, the GT3 is rear-wheel drive (RWD) and typically equipped with ultra-high-performance or semi-slick tyres.

Correct tyre fitment is critical for track performance, braking stability, and cornering grip.

📊 Factory Wheel & Fitment Specifications

🔩 Core Fitment Data (GT3 – All Generations)

• Bolt Pattern (PCD): 5×130

• Centre Bore: 71.6 mm

• Wheel Bolt Thread: M14 × 1.5

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

✅ GT3 models may feature centre-lock wheels (single nut) — requires special tools.

🛞 Factory Wheel Sizes & Offsets

🔹 Porsche 997 GT3

🔹 Porsche 991 GT3

🔹 Porsche 992 GT3

📌 GT3 uses extremely wide rear wheels for track grip.

📏 Factory Tyre Sizes

🔹 Porsche 997 GT3

• Front: 235/35R19

• Rear: 305/30R19

🔹 Porsche 991 GT3

• Front: 245/35R20

• Rear: 305/30R20

🔹 Porsche 992 GT3

• Front: 255/35R20

• Rear: 315/30R21

📌 GT3 tyres are designed for maximum lateral grip and track performance.

⚙️ Recommended Tyres (Australia)

🏁 Track-Focused Tyres (Primary Choice)

• Michelin Pilot Sport Cup 2 (N-rated)

• Michelin Cup 2 R (Track)

• Pirelli Trofeo R

✔ Maximum dry grip
✔ Designed for track use

🔥 Street + Performance

• Michelin Pilot Sport 4S

• Continental SportContact 7

✔ Better wet grip
✔ More daily usability

⚠️ Comfort Option (Limited for GT3)

• Continental MaxContact MC7 (not typical for GT3)
  ✔ Lower noise
  ✔ Not suitable for aggressive driving

⚙️ Aftermarket Upgrade Guide

✔ OEM+ Setup (Recommended)

• Maintain factory sizing
  ✔ Best performance balance

✔ Track Setup

• Cup 2 / Cup 2 R
  ✔ Maximum grip
  ✔ Fast wear

✔ Street Setup

• PS4S / SportContact 7
  ✔ Best compromise for road use

⚠️ Critical Fitment Notes

• GT3 is RWD (no AWD matching needed)

• Staggered setup = NO front-to-rear rotation

• Track tyres require:

  • Proper warm-up

  • Correct pressures

• Incorrect sizing affects:

  • Handling precision

  • Track performance

• Always use N-rated tyres

🛠️ Torque & Installation Guide

• Torque Spec: 160 Nm (5-stud models)

• Centre-lock wheels require:

  • Special torque tool

  • Much higher torque (manufacturer spec)

• Re-torque after 50–100 km

🏪 Why Choose Autosport Tyreworld?

At Autosport Tyreworld, we specialise in performance & track vehicles:

✔ GT3 tyre fitment expertise
✔ Porsche-approved tyres available
✔ 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