Cycling ▎ an article solves the problem of abnormal noise of bicycle

Whether you like to ride in the mountains and enjoy close contact with nature, or participate in all kinds of mountain road races and feel the passion of the race.

Your car takes you through thousands of mountains and rivers and gallops one battlefield after another.

Everyone hopes that your car can always maintain its best state, but with the passage of time, your car sometimes makes some strange noises, What should I do now? Today, let’s talk about the main causes of abnormal bicycle noise and how to eliminate it.

01.

The screws of the kettle rack are loose.

Drinking water is necessary for both short and long-distance cycling.

Especially in hot summer, the water consumption is faster than that in other three seasons.

Now, 1-2 kettle racks can be installed on the bicycle frame.

The riding road is sometimes smooth and sometimes bumpy.

When the vibration of the road is transmitted to the frame, it is easy to loosen if the installation screws of the kettle frame are not tightened.

On the bumpy road, the kettle frame hits the frame with high frequency, making a clear sound of “clanging”.

▲ abnormal noise caused by loose screws of kettle frame is very common.

It is recommended that motorists check whether the water bottle rack is loose before going out.

If it is loose, use an Allen wrench to tighten the installation screws of the water bottle rack.

Remember not to tighten it too tightly, especially the plastic water bottle rack.

If the screws are tightened too tightly, it will increase the probability of cracking of the water bottle rack.

02 pedal} when the bicycle makes abnormal noise, the source of the abnormal noise can be judged before the remedy can be applied to the case.

If there is abnormal noise when stepping on it, the sound disappears when not stepping on it, most of them are problems with the pedal, central shaft and crank.

The simplest way to judge whether the pedal is the source of abnormal sound is to replace a new pedal.

If the abnormal sound is eliminated, congratulations on finding the crux.

The reasons for the abnormal sound of the pedal may be that the pedal is loose, the thread is excessively dry, and the axis of the pedal is framed.

For drivers who have locked, if the lock plate is worn too much, the frame between the lock plate and the lock pedal will be too large, which will also produce creaking noise.

If the lock plate makes abnormal noise relatively new, check whether the lock pedal axis has frame amount and whether the spring tension is too loose.

When riding on the road without tightening the mountain lock plate screws, it is easy to cause the lock plate to float in all directions.

At this time, there will not only be abnormal noise, but also the floating of the lock plate will hurt the sole of the shoe.

It is more difficult to unlock.

▲ the plastic foot pedal has a short service life and is prone to problems such as rough rotation and the amount of axis frame.

You might as well prepare a better foot pedal for a rainy day.

03.

The probability of abnormal sound caused by loose crank screws is very small.

Generally, the screws in all parts of the finished vehicle will be tightened according to the specified torque value.

However, if the car is self-assembled and no torque tool is used, the crank screws may indeed be loose after long-time riding.

Check whether the crank screws are loose.

Place the cranks on both sides in a horizontal position, hold the cranks on one side with both hands, and force up and down to observe whether there is any loose abnormal sound.

If there is any abnormal sound, it can be solved with the help of a torque wrench, or simply handed over to the car shop for maintenance.

It is best to apply grease to the crank screws to reduce the abnormal sound caused by excessive drying of threads.

04 loose plate nails ― the plate nails on both mountain bikes and road bikes are used to fix the disc.

If the plate nails are loose during riding, stop riding immediately.

This is not only a problem of abnormal noise, but a potential safety hazard.

You should seek the help of the nearest car store.

05 abnormal sound of the central shaft ， the abnormal sound of the central shaft is a regular abnormal sound at the five-way joint accompanied by the trampling action.

At this time, the abnormal sound of the central shaft should not only be considered as a problem with the central shaft, but should be analyzed from two aspects: the processing accuracy of the frame and the central shaft.

If the frame quality is average or even inferior, the machining accuracy of the five links is naturally not high.

At this time, no matter what price you use, even the expensive ceramic shaft, there is basically no solution to the abnormal sound, so you have to change the frame.

If the threaded center shaft is used and installed by itself, the abnormal sound may be that it is not tightened according to the specified torque value; If the press in center shaft is used, the angle deviation during installation and the non-standard installation method are also easy to cause abnormal noise.

Another is riding for a long time, so that rain, cement and sand invade the central axis.

At this time, you need to maintain the central axis.

Professional technicians can help you.

▲ after sediment intrusion or long-time riding, the cleaning and maintenance of the central shaft is imperative.

06.

The quick release lever is too loose.

How tight the quick release lever needs to be, which is a problem that every motorist will encounter.

If the quick release lever is too loose, it is easy to make abnormal noise when riding, especially when the wheels shake greatly when shaking the car, the noise will be particularly obvious, and even there will be serious potential safety hazards.

Therefore, when the lock is quickly removed, the palm feels a resistance when pressed down, but it can be pressed down again.

07 air nozzle} take the open wheel group and tube tire wheel group of highway vehicle as an example.

There is a nut at the air nozzle of the open wheel group, which is used to fix the air nozzle and prevent the air nozzle from moving up and down and hitting the wheel rim.

There is no fixed nut on the tube tire air nozzle.

If the diameter of the air nozzle and the reserved hole of the wheel set are different, it is easy for the air nozzle to hit the edge of the reserved hole.

Wrap a circle of 3M electrical tape around the air nozzle to easily solve the problem of abnormal sound.

Some wheel sets (such as clx50) have their own air nozzle stickers that are similar to each other.

▲ nuts and electrical tape can effectively prevent abnormal noise caused by the impact of air nozzles and rims.

08 abnormal noise of speed change system ▲ with the long-term use of speed change system, inaccurate and not smooth speed change may occur, and “stuck” will be sent from the speed change system Because of the limited space, I won’t describe how to adjust the speed change.

Please refer to the introduction to eliminating abnormal sound of the speed change system in the 6th issue of bicycle chronicle..