Zimmermann Formula F Brake Disc

Zimmermann Formula F brake discs (also called compound brake rotors or disc brake rotors) are two-piece replacement rotors. Each has a lightweight aluminum hub joined to a cast friction ring. The Formula F line was added to the Zimmermann range in 2017. It was developed as a replacement for the riveted compound discs fitted as original equipment on late-model BMW F-series vehicles.

Key Features:

• Two-piece compound construction: an aluminum hub is friction-lock riveted to the cast friction ring, like the original-equipment design.
• Reduced weight: the aluminum hub in place of a cast hub lowers unsprung mass. Zimmermann says this can cut weight by up to 15 percent.
• High-carbon friction ring: the casting improves thermal conductivity and durability under heavy braking.
• Coat Z corrosion protection: a rust-preventive coating helps keep the disc looking good and protects it before installation.
• ECE R90 approval: Zimmermann states that the range is approved to ECE R90 and is comparable to original-equipment discs.

Lower unsprung mass can improve acceleration, handling and ride feel. The OE-style design lets the disc go in place of the original part without modification. Formula F rotors are a quality choice for routine brake service.