Abstract: An adjustable rear view mirror support system for cycles is disclosed, which support system includes means designed to be attached to, or be integral with, a brake lever bracket assembly, which brake assembly is in turn adapted to be mounted on a cycle handlebar. The mirror support system is designed to allow adjustment of a supported mirror independently in at least two directions, while the mirror support is attached to a part of a brake lever bracket assembly mounted on a cycle handlebar. Various specific means for attaching the mirror support system to a brake lever bracket assembly, or constructing a portion of the support system integral with a brake lever bracket assembly, are disclosed.