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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://design91.uk/images/schemaLogo.png https://design91.uk/images/schemaLogo.png +443456003478 https://design91.uk Facebook Instagram

Alloy Wheels 21"

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DISPLAYING 1 to 4 (of 4 products)
Special Order item
91804460002
Product Information
Product Information
Original Porsche 20-/21-inch 918 Spyder alloy summer wheel-and-tyre set. One-piece forged alloy wheel in filigree 10 double-spoke design, painted in Black with bright-turned face.

Wheel dimensions (offset (ET) in mm):
Front: 9.5 J x 20 ET 57
Rear: 12.5 J x 21 ET 57

Tyre specifications:
Front: 265/35 ZR 20
Rear: 325/30 ZR 21

Fits:
Porsche 918 Spyder
Porsche 918 Spyder Weissach package

Note: The hub caps are not included in the scope of supply.

Please note: Delivery time: approx. 6-10 weeks

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91804460002
91804460002

The product you are viewing cross references to these numbers
Special Order item
91804460008
Product Information
Product Information
Original Porsche 20-/21-inch 918 Spyder magnesium summer wheel-and-tyre set. One-piece forged magnesium alloy wheel in Porsche RS Spyder motor sport design, completely painted in Black (satin-gloss). The 918 Spyder magnesium wheel offers a weight advantage of approx. 14.9 kg compared to the 918 Spyder wheel (vehicle weight).

Wheel dimensions (offset (ET) in mm):
Front: 9.5 J x 20 ET 57
Rear: 12.5 J x 21 ET 57

Tyre specifications:
Front: 265/35 ZR 20
Rear: 325/30 ZR 21

Fits:
Porsche 918 Spyder
Porsche 918 Spyder Weissach package

Note: The hub caps are not included in the scope of supply.

Please note: Delivery time: approx. 6-10 weeks

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91804460008
91804460008

The product you are viewing cross references to these numbers
Special Order item
91804460004
Product Information
Product Information
Original Porsche 20-/21-inch 918 Spyder alloy summer wheel-and-tyre set. One-piece forged alloy wheel in slimline 10 double-spoke design, completely painted in Platinum (satin-gloss).

Wheel dimensions (offset (ET) in mm):
Front: 9.5 J x 20 ET 57
Rear: 12.5 J x 21 ET 57

Tyre specifications:
Front: 265/35 ZR 20
Rear: 325/30 ZR 21

Fits:
Porsche 918 Spyder
Porsche 918 Spyder Weissach package

Note: The hub caps are not included in the scope of supply.

Please note: Delivery time: approx. 6-10 weeks

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91804460004
91804460004

The product you are viewing cross references to these numbers
Special Order item
91804460006
Product Information
Product Information
Original Porsche 20-/21-inch 918 Spyder magnesium summer wheel-and-tyre set. One-piece forged magnesium alloy wheel in Porsche RS Spyder motor sport design. The 918 Spyder magnesium wheel offers a weight advantage of approx. 14.9 kg compared to the 918 Spyder wheel (vehicle weight).

Wheel dimensions (offset (ET) in mm):
Front: 9.5 J x 20 ET 57
Rear: 12.5 J x 21 ET 57

Tyre specifications:
Front: 265/35 ZR 20
Rear: 325/30 ZR 21

Fits:
Porsche 918 Spyder
Porsche 918 Spyder Weissach package

Note: The hub caps are not included in the scope of supply.

Please note: Delivery time: approx. 6-10 weeks

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91804460006
91804460006

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 4 products)
About Alloy Wheels 21"

Alloy Wheels 21" – Premium Performance Alloy Wheels for Porsche

Alloy wheels 21" are premium performance wheels engineered to deliver maximum road presence, enhanced handling stability and increased brake clearance on modern Porsche models. Commonly fitted to high-performance and luxury Porsche platforms, 21" alloy wheels support wide, low-profile tyres and advanced braking systems while maintaining confident steering response and high-speed control.

Manufactured from high-quality aluminium alloys, these wheels offer an optimal balance of strength, reduced weight and effective heat dissipation compared to steel alternatives. At Design911, we supply a carefully curated range of 21" alloy wheels from leading performance manufacturers, designed to meet Porsche fitment standards and modern performance expectations.

What Do 21" Alloy Wheels Do?

Alloy wheels are designed to reduce unsprung weight while increasing rigidity and braking capability, directly enhancing vehicle dynamics. The 21" size delivers:

• Improved high-speed stability and steering precision
• Reduced unsprung mass for better suspension control
• Increased brake clearance for large performance braking systems
• Compatibility with wide, ultra-low-profile modern tyre options

Compared to smaller wheel sizes or steel wheels, 21" alloy wheels provide enhanced responsiveness, braking performance and a commanding visual stance.

Why Choose 21" Alloy Wheels?

21" alloy wheels are chosen by Porsche enthusiasts because they offer:

• Lightweight aluminium construction for performance driving
• A large diameter suited to modern and high-output Porsche platforms
• Compatibility with high-performance tyres and advanced brake systems
• A wide range of premium, luxury and motorsport-inspired designs
• Exceptional road presence and contemporary styling

For many Porsche owners, 21" alloy wheels deliver the ultimate blend of performance capability, luxury appearance and modern Porsche aesthetics.

When Should You Fit or Replace 21" Alloy Wheels?

21" alloy wheels are ideal when:

• Upgrading a Porsche for maximum visual impact and performance
• Installing large brake systems requiring increased clearance
• Replacing worn or non-original wheels
• Enhancing both handling performance and modern vehicle aesthetics

Selecting the correct 21" alloy wheel helps preserve Porsche handling balance while unlocking improved grip, braking performance and stability.
At Design911, our alloy wheels meet strict standards for Porsche fitment accuracy, strength and durability.

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