Riders who ride for a long time will make different abnormal noises when pedaling, and often feel that the abnormal noise is at the foot when pedaling, but the specific location is uncertain? Especially with the swinging rhythm of the body pedaling, it is not easy to find the specific location of the abnormal sound.
When it comes to abnormal noises, some riders often think that it is a problem with the BB or the big chainring crankset, but in fact, these abnormal noises may be transmitted in the frame, so it is not necessarily the sound made at the BB. In order to find out the abnormal noise, the only way to find out the part that is causing the abnormal noise can only be eliminated in turn. It is very likely that other parts such as the seat cushion and seat post make abnormal noises regularly.
Today, we will check the order of the car from top to bottom and from front to back to judge the specific location and components of the abnormal noise of the car.
Tools required: torque wrench, hex wrench, chain gauge, chain oil, etc.
Start with the seat cushion that is in contact with the body most frequently, and use a torque wrench to measure whether it is locked, and if you find that the screw on one side of the seat cushion is not locked, then the seat cushion may make an abnormal sound when you step on your legs and twist your hips.
The seatpost bundle is an important part to bear weight, and it is necessary to check the tightness of the seatpost bundle under stress, because the seatpost bundle is also prone to noise. When the seatpost bundle is locked, it is often afraid of locking too hard, but not too loose, so it is better to use a torque wrench to lock it according to the recommended value.
The bottle cage is easy to loosen the screws due to vibration after a long period of use, so recheck the lock at this time.
Many riders will disassemble and replace the pedals according to different use needs, or they will also remove the pedals when they want to pack the car, so it is likely that they are not completely locked after disassembly; In addition, the pedal is the most direct force point, and the pedal axis is also a consumable, so it will also be noisy**, it is best to rotate the axis when removing the pedal to see if it is smooth?
Usually the riders pay attention to the large chainring, after a long time of rotation, its two fixing screws may also be loose, use the torsion wrench to check whether it is locked.
If the chain is easy to shake and make noise, do a tension measurement first to see if it is old and elongated? The overstretched chain has a poor fit with the flywheel and the large chainring, which is naturally prone to abnormal sounds.
By the way, check whether the chain will be too dry, if the chain is relatively dry, it will also cause friction and abnormal sound with the flywheel and large chainring.
After the actual inspection of the car, it was found that many parts were loose, so the parts were re-locked, and it was also found that the chain was too dry and needed to be re-oiled. If you ride the car for a long time, it will inevitably loosen and make a strange sound. If these possibilities are ruled out, and there is still a strange sound, it may be in the BB and flywheel parts, which are not easy to disassemble and assemble, so it is recommended to leave them to a professional store to deal with.