Product Description
EBC 2 Piece SG Racing Rear Rotors (SG2F026) 2021+ BMW M3 M4 (G80 G82)
Fully Floating
After an extensive development program, thousands of hours dyno testing, and the construction of a brand-new production line at the EBC Brakes World Headquarters in Northampton, UK, EBC are pleased to launch a new range of high performance 2-piece fully-floating brake rotors under the newly formed EBC Brakes Racing sub-brand.
Embarking on this project, the EBC Brakes Racing team’s mission was a clearly defined one; to develop the highest quality 2-piece floating brake rotor available on today’s marketplace. The componentry and technology used in these brake rotors exemplifies this pursuit of ultimate and absolute quality, culminating in a brake rotor that is perfectly matched to the highest braking demands of modern performance road and race cars.
Fully-Floating SG2F Two-Piece Rotors/Discs
‘SG2F’ rotors that serve as a direct replacement for performance vehicles where 2-piece brake rotors are fitted as standard, e.g. Nissan GT-R (R35).
Where the vehicle has a 2-piece pin-drive brake rotor as original equipment, EBC’s SG2F 2-piece rotor upgrade seamlessly replaces the pin-drive rotor with a true fully-floating 2-piece rotor, whilst requiring no vehicle modifications.
Highest of Quality
EBC Brakes Racing would like to emphasise that we put as much effort into development of our rotor metallurgy as what we put into development of our pad friction materials. The pad and rotor combined form the friction coupling; if either component is of poor quality then the outcome will likely be poor overall system performance. The best brake pad in the world used on a low-quality rotor with a bad metallurgy will result in merely average overall performance, since the pad will not be able to deposit the ‘transfer layer’ onto the brake disc that is critical to high brake system performance. For this reason, EBC Brakes Racing use only the highest quality disc alloy available.
The Benefits
The benefits of using a high-performance metallurgy are evident after testing EBC Brakes Racing’s 2-piece floating rotors against the recently introduced and extremely harsh ‘Reg 90’ dynamometer routine. The EBC 2-piece rotors completed two full test cycles back-to-back with zero disc cracking and no visible disc crazing. To put this into perspective, most OE discs show signs of cracking at stop 40 and then fail at 50% through just one R90 test, at stop 80 of 150. The quality of EBC’s metallurgy coupled with the fact that the disc is fully-floating in its design allows EBC’s 2-piece rotors to outperform most OE discs by a factor of over 4x in the ‘R90 Thermal Fatigue Test’.
