The SRAM G2 RE Disc Brake combines the performance capabilities of the G2 R levers and gravity-focused Code calipers for a braking system that can handle the higher speeds and weight of E-MTBs. These 4-piston, hydraulic brakes are built from lightweight aluminum so we don't end up with useless brakes during a long descent and are compatible with all SRAM Code brake pads making finding replacements a breeze.