Shimano BL-M555 is a hydraulic disc brake lever designed for use with Shimano disc brake systems. It is a lightweight and durable lever that provides excellent braking power and modulation. The BL-M555 is also easy to adjust, making it a great choice for riders of all levels.

Some of the key features of the Shimano BL-M555 include:

• Servo Wave action: This provides increased power and a shorter free stroke, giving you more control over your braking.
• Reach adjust: The lever reach can be adjusted to fit your hand size and riding style.
• Free stroke adjust: The free stroke can be adjusted to change the amount of lever travel before the brakes engage.