SHIMANO - Flat Mount - Mechanical Disc Brake - Front Caliper The SHIMANO RS305 mechanical disc brake is easy to control, set up, and maintain. It mounts via Shimano's flat-mount interface.
Lining: resin
Less noise and better modulation
50% higher wear resistance than K03S
110% higher wear resistance than K02S
Piston: for 2-piston brake caliper
Back plate: stainless steel