Shimano CUES BL-U6030L/BR-U6030F Disc Brake Lever - Front Hydraulic Flat Mount Resin PadsShimano CUES BL U6030L BR U6030F Disc Brake and Lever Front Hydraulic Flat Mount Resin Pads. The Shimano CUES BL U6030 Hydraulic Disc Brake Lever inheriting advanced features from the higher end Shimano 105 series features an updated lever position and bracket shape developed from extensive research on various hand shapes. The BL U6030 lever is paired with the BR U6030 hydraulic disc brake caliper that has a simple and lightweight 2 piston