🏁 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.
Need tyres for your Porsche 911 Speedster in Adelaide?
Autosport Tyre World Magill can help confirm the correct tyre size, load rating, wheel fitment and alignment needs before you order.
Call Magill: 0452 641 023 Get fitted tyre quote View tyres Book wheel alignment
Tyre options and fitment help for Porsche 911 Speedster
Use these links to check available tyre options by size. If you are unsure which size suits your exact model, send us your tyre placard photo before ordering.
| Size / service | Best use | Shop or search | Fitment check |
|---|---|---|---|
| 245/35R20 | Performance, comfort and upgrade options | View 245/35R20 tyre options | Check fitted availability |
| 305/30R20 | 4WD, touring, AT/HT tyre options | View 305/30R20 tyre options | Check fitted availability |
| Wheel alignment | Recommended after tyre or wheel changes | Wheel alignment Adelaide | Call Magill |
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)
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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 (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)
| Position | Wheel Size | Offset |
|---|---|---|
| Front | 20x9 | ET55 |
| Rear | 20x12 | ET47 |
📌 Same wheel setup as 991 GT3
📏 Factory Tyre Sizes
🔹 OEM Tyre Setup
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Front: 245/35R20
-
Rear: 305/30R20
📌 Designed for maximum grip and precision handling
⚙️ Recommended Tyres (Australia)
🏁 Track-Focused Tyres (Factory Style)
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Michelin Pilot Sport Cup 2 (N-rated)
✔ Maximum dry grip
✔ Designed for GT3-level performance
🔥 Street + Performance (Recommended)
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Michelin Pilot Sport 4S
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Continental SportContact 7
✔ Better wet performance
✔ More usable for road driving
🔇 Comfort Option (Limited Use)
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Continental MaxContact MC7 (not typical for Speedster)
✔ Lower noise
✔ More comfort-focused
⚙️ Aftermarket Upgrade Guide
✔ OEM+ Setup (Recommended)
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245/35R20 + 305/30R20
✔ Maintains GT3-based handling
✔ Street Setup
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PS4S / SportContact 7
✔ Best for daily + spirited driving
✔ Track Setup
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Cup 2
✔ Maximum performance
⚠️ Critical Fitment Notes
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Speedster is RWD (no AWD constraints)
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Staggered setup = NO front-to-rear rotation
✔ Track tyres require:
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Warm-up before aggressive driving
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Proper pressure monitoring
❌ Incorrect tyres will:
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Reduce handling precision
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Affect braking performance
✔ Always recommend N-rated tyres
🛠️ Torque & Installation Guide
🔧 5-Stud Wheels
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Torque: 160 Nm
🔧 Centre-Lock Wheels (Most Speedster Models)
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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
Need tyres or wheel alignment for your Porsche 911 Speedster in Adelaide?
Send us your tyre size, vehicle model or tyre placard photo and the team at Autosport Tyre World Magill will confirm suitable options, availability and fitted advice.
Autosport Tyre World Magill: 647 Magill Road, Magill SA 5072. Phone 0452 641 023.
Call Magill Get fitted tyre quote View tyres Wheel alignment Adelaide