Tire Size Specification
Verified OEM & Service Reference2015 Porsche 911 Carrera S / GTS 3.0L Twin-Turbo Flat-6 — Tire Size
Recommended interval: Rotate every 5,000–7,500 miles; check cold PSI monthly
Engine / Trim Variant
Factory Tire Size
245/35R20
Rear Factory Size
305/30R21
Technical Specifications
| Front Tire Size | 245/35R20 |
|---|---|
| Rear Tire Size | 305/30R21 |
| Rim / Wheel Size | 20x8.5J / 21x11.5J |
| Matched Trims | Carrera 4 Cabriolet, Carrera 4 Coupe, Carrera 4 GTS Cabriolet |
Compatible Aftermarket Options
Direct OEM cross-references- Buy Michelin / Continental / Pirelli 245/35R20 on AmazonMichelin / Continental / Pirelli245/35R20Front
Search query: 245/35R20 tire
- Buy Michelin / Continental / Pirelli 305/30R21 on AmazonMichelin / Continental / Pirelli305/30R21Rear
Search query: 305/30R21 tire
Tire Size Fitment by Engine / Trim (2015 Porsche 911)
| Engine / Trim | Oil Spec & Capacity | OEM Oil Filter |
|---|---|---|
| Carrera / Carrera 4 / Targa 4 (3.0L Twin-Turbo) | 0W-40 • 8.5 qt (8.0L) | 9A2-107-224-00 |
| Carrera S / 4S / GTS (3.0L Twin-Turbo) | 0W-40 • 8.5 qt (8.0L) | 9A2-107-224-00 |
| GT3 / GT3 RS (4.0L Naturally Aspirated) | 0W-40 • 7.9 qt (7.5L) | 9A1-107-224-00 |
| Turbo / Turbo S (3.7L Twin-Turbo) | 0W-40 • 8.8 qt (8.3L) | 9A2-107-224-00 |
DIY Fitment & Verification Checklist for 2015 Porsche 911
- Confirm your engine code or trim variant above before ordering parts, as mid-year production changes can affect tire size fitment.
- When purchasing OEM or aftermarket brands (Motorcraft, ACDelco, Mopar, Wix, Fram, Mobil 1, Bosch, NGK), cross-check the Amazon Garage Confirmed Fit badge with your 17-digit VIN.
- Always consult your 2015 Porsche 911 owner's manual for exact torque specs and fluid service intervals.
Sources: NHTSA vPIC & OEM Service SpecificationsReport an inaccurate spec or part number
Frequently Asked Questions
What is the OEM tire size specification for a 2015 Porsche 911?
The primary OEM tire size part number / specification for the 2015 Porsche 911 Carrera S / GTS 3.0L Twin-Turbo Flat-6 is 245/35R20.
Which aftermarket tire size brands fit the 2015 Porsche 911?
Compatible aftermarket options include Michelin / Continental / Pirelli 245/35R20, Michelin / Continental / Pirelli 305/30R21.