Girodisc 2-Piece Floating Front Rotors for BMW E9X 335i & 335xi (A1-114)

Girodisc Front 2-Piece Floating Brake Rotors – BMW E90, E91, E92 & E93 335i/335xi

Enhance your BMW's braking performance with the Girodisc A1-114 Front 2-Piece Floating Rotors, engineered specifically for the BMW E9X 335i and 335xi. Designed as a direct replacement for the factory front brake discs, these lightweight performance rotors provide improved cooling, reduced rotational mass and exceptional braking consistency for fast road driving, track days and motorsport applications.

Unlike oversized big brake conversions, Girodisc's advanced two-piece rotor system retains the factory brake calipers, brake bias and ABS calibration while delivering the benefits of a motorsport-inspired floating rotor design. Installation is completely bolt-on with no modifications required.

Lightweight Motorsport Construction

Each Girodisc rotor features a precision CNC-machined 6061-T6 aircraft-grade aluminium centre hat, manufactured from premium U.S.-sourced material, combined with a proprietary high-carbon cast iron friction ring. This lightweight construction reduces unsprung and rotational weight while offering exceptional strength and thermal stability under repeated heavy braking.

The rotor ring incorporates curved directional cooling vanes, engineered to maximise airflow through the disc. Acting as a centrifugal air pump, this design rapidly removes heat from the braking surfaces, helping to minimise brake fade and maintain a firm, consistent brake pedal even under demanding conditions.

Fully Floating Rotor Design

The Girodisc floating assembly utilises 10 high-strength alloy steel drive pins with corrosion-resistant cadmium plating to securely connect the friction ring to the aluminium hat while allowing controlled thermal expansion.

Key performance benefits include:

• Allows natural expansion during extreme braking temperatures
• Reduces thermal stress and the risk of rotor distortion
• Improves pedal feel and braking consistency
• Helps the rotor self-centre between the brake pads
• Delivers dependable braking performance during repeated heavy use

To ensure quiet everyday operation, Girodisc incorporates anti-noise spring hardware that eliminates the rattling commonly associated with floating rotors while still allowing unrestricted movement when temperatures increase.

Serviceable Two-Piece Design

One of the standout advantages of Girodisc's modular rotor system is its long-term serviceability. Once the cast iron friction rings reach their wear limit, they can be replaced independently while retaining the original lightweight aluminium hats.

This significantly reduces long-term maintenance costs while preserving all of the performance benefits of the complete Girodisc rotor assembly.

Features

• Genuine Girodisc A1-114 front rotor kit
• Direct bolt-on replacement for OEM front brake discs
• Lightweight 6061-T6 aircraft-grade aluminium centre hats
• Proprietary high-carbon cast iron friction rings
• Fully floating two-piece rotor construction
• Curved directional cooling vane design
• 10 high-strength alloy steel floating drive pins
• Anti-noise spring hardware for quiet operation
• Maintains factory brake bias and ABS functionality
• Reduces unsprung and rotational weight
• Replaceable friction rings for lower servicing costs
• Suitable for fast road, track day and motorsport use
• Sold as a pair

Vehicle Fitment

Compatible with:

• BMW E90 335i
• BMW E91 335i Touring
• BMW E92 335i Coupe
• BMW E93 335i Convertible
• BMW E90 335xi
• BMW E91 335xi Touring
• BMW E92 335xi Coupe
• BMW E93 335xi Convertible

Please confirm your vehicle's brake specifications before ordering to ensure correct fitment.

Why Choose Girodisc?

Girodisc is recognised worldwide for producing premium braking components that combine OEM fitment with race-proven engineering. Their two-piece floating rotor systems improve cooling efficiency, reduce rotating mass and deliver exceptional durability without compromising factory brake balance or everyday drivability.

Whether you're building a capable street car or preparing your BMW for regular track use, Girodisc front rotors offer the confidence, consistency and performance expected from a premium braking upgrade.

Package Contents

• 2 × Girodisc Front 2-Piece Floating Rotors
• CNC-machined aluminium centre hats (pre-assembled)
• Floating mounting hardware
• Ready for installation