- DOT 5.1 Brake Fluid 100ml Bottle * Art Nr: 710036 * EAN: 8594052651300 Synthetic brake fluid for all hydraulic brake systems of bicycles that use DOT 5.1 brake fluid. DOT 5.1 brake fluid has a higher boiling point than previous DOT brake fluids, this reduces the chance of bubbles forming during extreme braking. Please read the instruction manual for your brakes to find the correct brake fluid for your brakes.