BBS RT88 Forged Wheels – BMW M5 G90 / G99

BBS RT88 forged wheels for the BMW M5 G90 and G99 are developed using BBS Motorsport technology, engineered for maximum strength, precision, and weight efficiency under extreme load conditions.

As part of BBS’s motorsport-derived wheel program, the RT88 features a fully forged construction optimized for high-performance applications. The result is improved steering response, reduced unsprung mass, and enhanced overall vehicle dynamics for the BMW M5 platform.

Product Highlights

• Motorsport-derived forged wheel construction
• High stiffness-to-weight ratio for performance driving
• Vehicle-specific fitment for BMW M5 G90 (Sedan) and BMW M5 G99 (Touring)
• Optimized for high-load, high-performance applications
• Compatible with OEM and performance brake systems

Fitment Specifications

• Front (RT88-062): 11.0 x 21 ET21.7
• Rear (RT88-063): 11.5 x 21 ET21

BaanVelgen Recommendation

• Performance street – Balanced setup with OEM+ tire sizing
• Track-focused build – Optimized tire setup for maximum grip
• OEM+ motorsport look – Clean forged finish with factory-inspired stance

Included Components

• BBS RT88 forged wheels (set of 4)
• BBS center caps
• Official BBS documentation

Technical Specifications

Brand	BBS
Model	RT88
Construction	Forged Monoblock
Front Fitment	11.0 x 21 ET21.7 (RT88-062)
Rear Fitment	11.5 x 21 ET21 (RT88-063)
Vehicle	BMW M5 G90 / G99
Manufacturing Origin	Germany

Installation & Compatibility

This wheel set is engineered specifically for the BMW M5 G90 and G99 platform. Professional installation and correct torque procedures are required to ensure optimal performance and safety.

Engineering Perspective

The BBS RT88 is developed with a focus on structural rigidity and durability under high load. The forged construction ensures consistent performance during aggressive driving, while reducing unsprung mass for improved suspension response.

This makes the RT88 a performance-driven upgrade for the BMW M5 G90 and G99, particularly suited for drivers who prioritize precision and reliability.

Ordering Information

• Worldwide shipping from our warehouse in the Netherlands.
• Built to order – estimated lead time 100 days
• 100% authentic BBS product with manufacturer warranty