An apparatus for a bicycle brake comprises a housing with a first piston bore and a second piston bore, a first piston disposed in the first piston bore, a first piston rod attached to the first piston and extending from the first piston toward the outside of the housing for coupling to a first brake arm, and a second piston disposed in the second piston bore. A plurality of frequency settings is employed. The ground strap assembly is configured to conform to at least one body member feature such that a distance from the ground strap assembly to a major rear surface of the body member is less than a predetermined distance.