In collaboration with Porsche’s Development Centre in Weissach, Manthey Racing has introduced a new lightweight forged aluminum wheel set developed specifically for the Porsche 911 GT3 (992.2) platform. This component is part of a broader effort to optimize the dynamic characteristics of the GT3 through carefully engineered, motorsport-tested upgrades.

We’ll explore the design motivations, structural improvements, and performance implications of the new wheels, as well as the validation methods and regulatory considerations that shaped their release.

Reducing Unsprung and Rotating Mass

A primary goal of this forged wheel set is to reduce unsprung mass—the portion of a vehicle’s weight that is not supported by the suspension (wheels, brakes, hubs, etc.). Reducing unsprung mass has a direct effect on:

• Suspension responsiveness
  
• Contact patch consistency over uneven surfaces
  
• Overall handling precision

In this case, the forged wheel set achieves a 6 kg weight reduction compared to the standard wheels on the 992.2 GT3. This reduction in rotating and unsprung mass helps improve both steering feel and dynamic response, particularly in high-speed or track environments.

Structural Reinforcement: Load Capacity and Stiffness

Beyond weight reduction, the forged wheels offer increased structural strength:

• Over 20% higher wheel load capacity than the standard wheels
  
• Improved bending and torsional stiffness, essential for maintaining geometry under high lateral loads and aerodynamic downforce

These attributes are particularly relevant for vehicles operating with advanced aerodynamic kits or modified suspension systems, as the wheel must resist deflection to maintain correct alignment and tyre performance.

Design and Testing Methodology

Manthey and Porsche employed a multi-phase testing approach, combining laboratory and real-world scenarios. Over 40 wheel samples were subjected to testing criteria including:

• Radial fatigue
  
• Impact resistance
  
• Lateral stiffness
  
• Rolling resistance
  
• High-speed structural stability

Track validation took place at the Nürburgring Nordschleife, chosen for its combination of high-speed straights and complex cornering forces. The aim was to simulate the type of loading conditions encountered in both competitive and demanding road driving.

These processes ensured the wheels met both Porsche’s internal standards and regulatory requirements for global road use.

Specifications and Fitment

The new forged wheels retain the original equipment (OE) sizing and offset, allowing direct compatibility with the GT3’s standard tyre package and brake hardware.

Wheel and Tyre Dimensions:

• Front: 20 inch with 255/35 ZR20 tyres
  
• Rear: 21inch with 315/30 ZR21 tyres

Available Finishes:

• Brilliant Silver
  
• Neodyme
  
• Black

The consistency in sizing eliminates the need for recalibration of ABS, PSM, or ride height sensors, making the upgrade mechanically straightforward.

Integration with Factory Standards

One of the notable aspects of this wheel set is its full homologation for road use:

• No additional approvals or modifications are required for installation
  
• It is classified as an official vehicle accessory and is eligible under the Porsche Approved Warranty

This reflects the influence of Porsche’s internal engineering and compliance standards in the development of the wheels, ensuring they align with factory specifications for roadworthiness and long-term reliability.

Applications and Use Cases

Although the wheels are fully road-legal, their characteristics are most relevant to drivers who prioritize:

• Frequent circuit use
  
• High-speed touring with aerodynamic enhancements
  
• Minimizing chassis flex under load
  
• Consistent handling and braking under extended thermal cycling

The enhanced load-bearing capacity and reduced mass make them suitable for situations where traditional cast or flow-formed wheels may experience limitations under repeated stress.

Conclusion

The development of the lightweight forged wheel set for the 911 GT3 (992.2) represents a targeted refinement to one of Porsche’s most capable track-focused vehicles. By reducing mass, increasing stiffness, and maintaining OEM-level fitment standards, the wheels serve both functional and engineering objectives without altering the vehicle’s baseline dynamics. Their design is a product of rigorous mechanical testing and reflects a deeper philosophy of incremental, systems-based performance improvement—one that is increasingly central to high-performance vehicle development. If you would like to learn more about this forged wheel set or other technical components available for Porsche GT models, please contact Autohaus Middle East Co. LLC. We are available to assist with product information, fitment guidance, and technical specifications.