Finish Line Disc DOT Brake Fluid is formulated specifically for bicycle brake systems and features a no compromise leading edge chemistry to provide superior fluid life and braking performance. Finish Line Disc DOT Brake Fluid meets the most stringent 5.1 specs and is an approved replacement fluid for braking systems requiring DOT 3, 4, and 5.1. Finish Line Disc DOT Brake Fluid features a super low viscosity to yield superior lever response, pad retraction, and consistent performance through a full range of operating temperatures. Finish Line DOT Brake Fluid is specifically engineered for use in bicycle hydraulic disc brake systems and is compatible with all 3, 4, and 5.1 DOT brake systems.