How to make your e-bikes disc brakes more durable?
 Mar 12, 2020|View:67


As the country ’s safety requirements for small electric mobility tools have become more stringent, last year ’s news broke that more than 90% of electric scooters on the market failed the random inspection, one of which was the failure of the braking distance. Some mid- to high-end small-scale travel products are often equipped with disc brake systems in order to achieve better braking results. So how much do you know about disc brakes? How to deal with and maintain common problems with disc brakes? Today, Weilun Encyclopedia will tell you about it.


Little knowledge about disc brakes

Disc brakes are all called disc brakes. They consist of a brake disc connected to the wheel and a brake caliper on the edge of the disc. The braking principle is to use external force to push the brake block to clamp the brake disc to produce a braking effect.

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Disc brakes can be divided into two types according to the way they control the rotation of discs: hydraulic disc brakes and line-pull disc brakes. Hydraulic disc brakes use brake fluid as the transmission material. The piston inside the cylinder compresses the fluid by acting on the force of the brake lever. The pressure passes from the oil pipe to the caliper, which pushes the piston in the caliper and drives the brake disc to hold the disc.


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Internal structure of hydraulic disc brake


The advantage of the hydraulic disc brake is that it can minimize the loss of power during the transmission process, that is, it can achieve a great braking effect with a very easy force. However, the disadvantage is that the sealing and integrity of the brake fluid needs to be maintained, and maintenance is more complicated.

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Hydraulic disc brake


The wire-pull disc brake uses the pulling force of the brake wire to allow the brake pads (to make the pads) inside the caliper to rub and clamp the disc to produce a braking effect. This is very similar to the V brakes used on bicycles, which use brake cables to brake. However, compared to the hydraulic type, the wire-pull disc brake will lose the braking force due to the length, elasticity of the wire itself, and friction of the casing, resulting in insufficient braking. The structure of the wire-pull disc brake is relatively simple. By replacing the brake cable and maintaining the lubricity in the tube of the brake cable, the brake weakening during operation can be solved, and it is easier to maintain.

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Wire Pull Disc Brake


Most power-assisted bicycles and electric scooters will use line-pull disc brakes, mainly because the disc brakes have better performance, simple maintenance, and high cost performance, and are suitable for most models. Among several common brakes, the performance of disc brakes is also at the forefront.

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Common problems with disc brakes

Although the disc brake is a cost-effective brake, it still has trouble problems. According to some feedback from the users of electric scooters, Xiaobian summarized a common problem of braking in the use of electric scooters.


1. Unsmooth riding caused by too tight or too loose disc brakes

It is one of the most common problems. Too tight a brake cable will cause excessive riding resistance, and too loose a brake will cause the brakes to be basically useless. The solution is also very simple. By adjusting the knob on the connection between the brake handle and the brake cable, the tightness of the disc brake can be adjusted. Rotate counterclockwise to tighten the brake cable, and clockwise to loosen the brake cable.



2. Noise from disc and wheel friction


This situation is caused by two reasons. The disc is not installed properly and touches the brake pads or the friction caused by the deformation of the disc. If it is the former, the position of the disc needs to be adjusted, and the distance between the disc and the brake pad is adjusted by adjusting the disc fixing screw; the latter requires the disc to be replaced to avoid damage to other components.




As above, if it is confirmed that the brake cable is not loose, it is very likely that the brake pads or the brake cable are worn. Check these two parts and replace the corresponding parts to restore normal use.


How to maintain small electric vehicles with disc brakes on a daily basis?

1. Develop good riding habits

Many users like quick braking, and this habit is not good for the user's own safety or the braking system. Because the effect of the disc brake is better, it is easy to lock the tires. In this case, the user is likely to lose balance and fall; for the brake pads, frequent rapid braking will cause excessive wear, and when emergency braking is really needed Failure of the brake pads can be very dangerous. Therefore, you should develop good habits when using the brakes, do not ride too fast, reduce the number of rapid braking, and try to brake slowly.


2. Regularly check and replace the brake cable and brake pads

Because the brake wire will lose its elasticity or wear due to long-term operation, brake pads (also known as pads) are one of the parts that are easy to wear. Therefore, it is necessary to regularly check the wear of these two components. Generally speaking, the brake pads can be used normally for about 6 months to 1 year in daily use, and the brake wires must be replaced if they are damaged.


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3. Maintenance of the disc

The line-pull disc brake is driven by a unilateral disc, because once the disc is deformed, the braking system will be invalidated. Therefore, during daily maintenance of the electric scooter, it is necessary to check whether foreign matter adheres to the disc to cause deformation during operation. When using the disc, try to prevent the disc from being deformed by external forces.





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