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Car repair is a technical job. So in the eyes of many people, even if it is troublesome, the first choice after any failure of the bicycle is still pushing the car shop.
As a result, it was found that the so-called failure may be a minor problem solved by the driver's drip screw.
In order to avoid the similar situation, recommended brother today organized 16 kinds of bicycle common faults to help you determine the status of the vehicle:
Fault 1: There is a noise when pedaling.
Causes and Suggestions: Due to the looseness of the joints at the crank, the shaft and the pedals, or the sound produced by the friction. If the crank bolt is loose, for example, the crank bolt can be tightened. If the crank is still ringing, remove it, apply a layer of grease on the shaft, and then reinstall the crank.
Fault 2: Transmission line pipe frame, wear off a piece of paint.
How to solve: Anti-friction silicone or rhino leather anti-friction tape can be affixed to the contact area, which is available on Taobao.
Fault 3: The flywheel rusts.
How to solve: If rust is not serious, use more lubricating oil to prevent further rust. At the same time in the process of riding the chain will also wear off part of the rust.
Fault 4: The rear dial continues to produce spike noise.
Cause and solution:
1. There has been a crash or a collision, resulting in deformation of the tail hook. Check whether there is deviation, if the deviation is serious, it is recommended to replace it directly;
2, the guide wheel has not been cleaned for a long time, and many stolen goods. Wash with a cleaning agent first, then lubricate with oil and wipe off excess oil.
3, the outer corner of the guide wheel wears badly, from the obtuse angle to sharp corners, may also produce abnormal sound, this situation is recommended to replace the guide wheel.
Fault 5: Chain abnormal sound.
Cause: The chain is short of oil and the chain is not fully lubricated.
Solution: Add chain oil or lubricant and wipe off excess oil.
Fault 6: When using a certain tooth ratio, pedaling occurs.
Causes and Solutions: If debris such as mud, weeds, leaves, and branches are stuck between the flywheels, dig them out. Because it will interfere with the normal engagement of the chain with the flywheel. If not, the flywheels may have worn out and it is usually necessary to replace the chain and the flywheel.
Fault 7: The V brake is weak when braking, but the brake block wear is not serious.
Reason: Due to the looseness of the brake lines or the serious wear of the rims of the CNC rim used by the car body.
How to solve: Turn the brake trimming nut anti-clockwise (usually near the caliper or brake hand, end of the brake line tube) to bring the brake block close to the rim. According to personal habits, adjust the degree of sensitivity.
Fault 8: Squeal when braking.
Cause and solution:
1. The quality of the brake pads or the hard brake pads used may cause abnormal noises. Replaceable brake pads or soft pads may be used.
2. The brake pads have been tilted due to installation or external forces. The surface of the posts has not even reached the tires. At this point, readjust the brakes.
3. The aluminum scraps attached to the brake pads are in friction with the rims. The brake pads can be polished with sandpaper or a trowel to remove aluminum scraps from the surface.
Fault 9: It rotates when the nail is removed.
Causes and solutions: Use a screwdriver or a special tool to fix it in the groove on the back of the screw, and then remove it.
Fault 10: Pedal off.
Causes and solutions: After the pedal is detached, check whether the thread connecting the pedals on the crank is complete. If it is intact, reinstall the pedal and tighten the screws. (Be sure to use the tool to tighten the screws. Not enough. If the treadle threads are damaged, you cannot continue riding. Only replace the crank.
Fault 11: Crank fell off.
Causes and solutions: Crank falling off is caused by the loosening of the screws fixing the crank. Everyday riding will slightly loosen the screws holding the crank. Check regularly and fix with hexagon socket.
Fault 12: The tire is cracked.
Reasons: Long-distance and cross-country riding complex road conditions, easily lead to split tires, if not repaired in time, prone to inner tube puncture.
How to solve: Observe whether the crack is on the front or the side of the tire. If it is on the side, you need to replace the tire immediately; if it is on the front, the gap should not exceed 0.5cm, you can use a special patch to repair the gap (for example, PARKTOOL There are such products).
Fault 13: Tyre bolts.
How to solve: After the tire is nailed, the nail should be taken out for the first time to prevent the inner tube from being pierced many times. If the inner tube has a small number of holes, it can be repaired with the built-in tire repair tool, or the inner tube can be directly replaced.
Fault 14: After the inner tube is repaired, it has just been fitted back and smashed.
Cause: The pad is misaligned or foreign objects remain in the tire.
How to solve: If the hole in the inner tube is on the inside, the cushion may be misaligned, causing the inner tube to be cut by the spokes; if it is on the outside, there may be some small, sharp foreign objects in the outer tube. Use your finger to carefully grope the inside of the tire and find the foreign object and remove it.
Fault 15: Tyre often.
Cause: The tire pressure is too low, or the speed of riding is too fast, and there is no timely attention to the road conditions.
How to solve: The tire has a standard pressure value. For the average rider, the recommended tire pressure is 140 psi~120 psi. This pressure value comes from the test. If the pressure exceeds 140 psi, it will increase the resistance of rolling. If it is too low, it will be easy to abortion. In addition, when the road conditions are poor, it is recommended to slow down.
Fault 16: The tire patch cannot bond with the inner tube.
Causes: There is not enough hair on the inner tube, and there are still more impurities on the surface; there is an air gap between the patch and the tire; there is less glue and the patch is moved without being completely dry.
How to solve: Clean the inner tube, mark the gap, mark the gap, and apply more glue. Make sure that the gap is located at the center of the tire patch and give the glue enough time to dry, about 5 minutes. Of course, you can also choose simple, fast rubber-free tires.
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