![Bicycle hydraulic brake service 02 - Brake working principle [0045]](https://www.bikegremlin.com/wp-content/plugins/wp-youtube-lyte/lyteCache.php?origThumbUrl=https%3A%2F%2Fi.ytimg.com%2Fvi%2FmrKiPETwVpM%2F0.jpg)
Why are hydraulic brakes so powerful, with great modulation, even without any servos? The working principle explained.
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