EBC Brakes Racing Fully-Floating 2-Piece Brake Rotors

EBC Brakes Racing's fully-floating 2-piece brake rotors are the result of an extensive development program and thousands of hours of dynamometer testing, engineered to meet the highest braking demands of performance road driving and motorsport. Produced under the EBC Brakes Racing sub-brand and manufactured at EBC's world headquarters in Northampton, UK, these rotors represent a decisive step beyond traditional one-piece and conventional bolt-up two-piece designs.

True Fully-Floating SD-Drive™ Technology

At the heart of this rotor line is EBC's patented SD-Drive™ bobbin system. Unlike simple bolt-up two-piece units, these flat-sided square-drive bobbins allow the cast iron friction ring to expand and contract freely under the thermal stress of heavy braking, eliminating disc warping and dramatically reducing thermal fatigue over the rotor's service life.

Key Features:

• G3500 High-Grade Disc Alloy Friction Rings — outer rings cast from the highest-grade G3500 alloy with high-carbon, high-copper metallurgy for superior thermal conductivity, heat cycling durability, and crack resistance derived directly from race technology
• Aerospace-Grade Aluminum Mounting Bells — precision-machined from billet aerospace-grade aluminum and black anodized for corrosion resistance; bells are reusable across multiple friction ring replacements, reducing long-term operating costs
• Solid Stainless Steel SD-Drive™ Bobbins — every bobbin is machined from a single piece of stainless steel so they can never rust, ensuring the rotor continues to float freely throughout its entire service life even after years of exposure to road elements
• Anti-Rattle Spring Clips — every bobbin location incorporates a spring clip that eliminates off-brake disc rattle, making these rotors fully road-friendly for street and daily use
• Handed Directional Curved Vanes — rotor rings are directionally handed left and right with curved vanes to ensure rotation always occurs in the correct direction for maximum cooling efficiency and balanced brake temperatures
• Reduced Unsprung Rotational Mass — lightweight two-piece construction lowers rotational inertia for measurable improvements in acceleration, braking response, and tire road holding
• Replaceable Friction Rings — worn outer rings can be replaced independently while the aluminum bell and stainless bobbins are reused, significantly lowering long-term running costs

Race-Proven and Road-Ready

EBC Brakes Racing's 2-piece rotors have been validated against the demanding Reg 90 dynamometer routine, completing two full test cycles back-to-back with zero disc cracking and no visible disc crazing — a result where most OEM discs show cracking within a single test cycle. The combination of G3500 metallurgy and fully-floating design allows these rotors to outperform most OEM discs by more than 4x in thermal fatigue testing.

With anodized hubs, stainless steel hardware, and anti-rattle clips throughout, this rotor line is equally at home on the public road as on the track — the ideal choice for enthusiasts who demand uncompromised braking performance without sacrificing everyday driveability. Multiple product configurations are available, including direct OEM 2-piece replacements (SG2F), 1-piece to 2-piece conversion upgrades (SG2FC), and rotors included in EBC's Balanced Brake Kits™ (SG2FK).