Differences between hydraulic and mechanical disc brake
When buying a second -hand bike Or new with disc brakes sometimes we do not pay attention to the drive system. Are they mechanical brakes or are hydraulic brakes? However, this aspect is of great importance in braking behavior. The disc brakes They have already become the reference standard of all types of bicycles, regardless of the mode practiced: Mountain Bike, road, Cyclocross either Grave). Therefore, in your future purchase, it is important to know the differences between a mounting with hydraulic or mechanical disc brakes, since each of them has its own characteristics that end up affecting issues such as performance or maintenance.
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6 key differences between hydraulic and mechanical brakes
There are numerous differences between hydraulic disc brakes and bicycle mechanics. Below we show what we consider to have a greater relevance when it comes to opting for one system or another.
Drive
Both systems have the same essential pieces: handle, hose or cable cover, clamp, pills and disc. But they differ in the technology used to function. In the mechanical brake the printed force on the handle is transferred to one of the pills (not both) through a brake cable in voltage. In the hydraulic brake the force that the cyclist prints in the handle is transferred to the pistons of the clamp - and from there to the two pills - by means of a liquid (mineral or synthetic oil, depending on the brand of the brakes). Due to the pressure exerted by the fluid, the pills will end up moving to press the disc and thus stop the wheel movement.
Braking behavior
The use of a cable or a liquid for energy transfer by the braking circuit makes the type of braking substantially change. A hydraulic disc brake will offer a more linear and progressive stop (from less to more).
The wheels will not suddenly block, reducing the risk of mishap or falling and favoring better control and bicycle handling. Instead, a mechanical disc brake provides a more abrupt type of braking, less linear. The braking power can be greater in the first moment of braking, but the cyclist has less margin to modulate braking energy according to their needs. In declines of large earrings, for example, the mechanical brake is less effective than the hydraulic.
Wet yield
Related to behavior, another of the big differences between hydraulic and mechanical brakes is its level of effectiveness with rain. A situation in which good brakes are essential. With the wet or slippery terrain it is better to have hydraulic disc brakes, and not only because it has greater braking progressivity. The circuit of a hydraulic disc brake is completely closed and is more stagnant to the entrance of water. In mechanical disc brakes the cable is exposed in its connection with the clamp. Thus, it is more likely that the water enters into contact is introduced into the circuit and modifies its operation, diminishing the power and modulation of the braking.
Brake adjustment
Hydraulic disc brakes are self -adjusting in potential, modulation, etc., thanks to the properties of brake fluid, responsible for its operation. On the other hand, a mechanical disc brake will need periodic settings to calibrate its power and modulation, through tensing or weaning of the cable, as shown in this School of School of Bicycle Mechanics EMEB: EMEB:
Remember that the mechanical disc brake setting is done in the two pills, but separately. Only one of them receives the strength of the handle through the cable, while the other is fixed and will require its own adjustment so that it is well aligned with respect to the other.
Maintenance of disc brakes
Hydraulic brakes are much easier to maintain and are more durable than mechanics. It will be enough to make an annual system review and purged the circuit, changing the brake fluid for a new one. It is a somewhat more thorough, but rare operation that will increase brake durability. You can see how it is done in this video:
Mechanical disc brakes, on the contrary, are more easily disagree. They require more constant maintenance, although simple, very similar to the classic shoes. In addition, its durability is more limited than hydraulics and pills usually wear faster.
