Finish Line announces two new high-performance brake fluids. One is mineral oil based and the other is a DOT 5.1 synthetic formula. (Refer to brake user guide for oil type). Both fluids are designed for use in hydraulic disc bicycle brake systems to provide maximum fluid life and optimal braking performance. Although they are 100% compatible with DOT 3 and DOT 4 fluids, the performance specifications of Finish Line DOT 5.1 far exceed them. Both fluids use low viscosity oils to ensure excellent operation even in very cold conditions.