🏁 Porsche 911 Speedster Tyre Size, Wheel Specs, PCD, Centre Bore & Torque Guide

🔧 Vehicle Overview

The Porsche 911 Speedster (991) is a limited-production model combining GT3 performance with open-top driving. Built on the GT3 chassis, it delivers track-level handling with a unique heritage design.

With high-revving performance and lightweight construction, tyre selection is critical for maintaining grip, balance, and driving precision.

📊 Factory Wheel & Fitment Specifications

🔩 Core Fitment Data (911 Speedster – 991)

• Bolt Pattern (PCD): 5×130

• Centre Bore: 71.6 mm

• Wheel Bolt Thread: M14 × 1.5

• Wheel Nut Torque (5-stud): 160 Nm

⚠️ Most Speedster models are equipped with centre-lock wheels
→ Requires special Porsche torque tool

🛞 Factory Wheel Sizes & Offsets

🔹 Porsche 911 Speedster (991)

📌 Same wheel setup as 991 GT3

📏 Factory Tyre Sizes

🔹 OEM Tyre Setup

• Front: 245/35R20

• Rear: 305/30R20

📌 Designed for maximum grip and precision handling

⚙️ Recommended Tyres (Australia)

🏁 Track-Focused Tyres (Factory Style)

• Michelin Pilot Sport Cup 2 (N-rated)

✔ Maximum dry grip
✔ Designed for GT3-level performance

🔥 Street + Performance (Recommended)

• Michelin Pilot Sport 4S

• Continental SportContact 7

✔ Better wet performance
✔ More usable for road driving

🔇 Comfort Option (Limited Use)

• Continental MaxContact MC7 (not typical for Speedster)
  ✔ Lower noise
  ✔ More comfort-focused

⚙️ Aftermarket Upgrade Guide

✔ OEM+ Setup (Recommended)

• 245/35R20 + 305/30R20
  ✔ Maintains GT3-based handling

✔ Street Setup

• PS4S / SportContact 7
  ✔ Best for daily + spirited driving

✔ Track Setup

• Cup 2
  ✔ Maximum performance

⚠️ Critical Fitment Notes

• Speedster is RWD (no AWD constraints)

• Staggered setup = NO front-to-rear rotation

✔ Track tyres require:

• Warm-up before aggressive driving

• Proper pressure monitoring

❌ Incorrect tyres will:

• Reduce handling precision

• Affect braking performance

✔ Always recommend N-rated tyres

🛠️ Torque & Installation Guide

🔧 5-Stud Wheels

• Torque: 160 Nm

🔧 Centre-Lock Wheels (Most Speedster Models)

• Requires special Porsche tool

• Torque significantly higher (manufacturer spec required)

✔ Re-torque after 50–100 km

🏪 Why Choose Autosport Tyreworld?

At Autosport Tyreworld, we specialise in limited Porsche models:

✔ GT3 & Speedster tyre 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