Shimano BR-M755 is a high-performance disc brake system designed for mountain bikes. It features a lightweight and compact design, powerful braking force, and easy installation. The BR-M755 is compatible with 170mm and 160mm rotors, and it comes with loosening-prevention wires to ensure secure attachment. With its reliable braking performance and ease of use, the BR-M755 is an excellent choice for mountain bikers seeking dependable stopping power on challenging trails.