Mountain bikes often have to change rear derailleurs twice before they can change gears

Mountain bikes often need to change rear derailleurs twice to change gears, which can be caused by the following:

1.Improper shift line tightness: The shift line of the rear derailleur needs to be properly tightened, too loose or too tight can cause the rear derailleur to not shift properly.

If the shift line is too loose, there may be a delay in shifting or not being able to change gears; If the shift line is too tight, it can cause the rear derailleur to be stressed too much and accelerate wear. The solution is to adjust the tightness of the shift line to make sure it is in proper condition.

2.Improper adjustment of the rear derailleur: The adjustment of the rear derailleur is very important for the correct shifting of gears.

If the H limit screw of the rear derailleur is not adjusted properly, it may cause the rear derailleur to not move to the correct position correctly, which will affect the gear shift. The solution is to adjust the rear derailleur to the correct position and adjust the H limit screw to ensure that the rear derailleur can move correctly.

3.Chain stuck: If the chain is too dirty or worn, it may cause the chain to get stuck in a certain position, affecting the rear derailleur shift. The solution is to clean and maintain the chain regularly to ensure that it is functioning properly.

4.Transmission failure: If the transmission of the rear derailleur fails, such as insufficient elasticity of the transmission spring, wear and tear of the transmission structure, etc., it may also cause the rear derailleur to not shift properly. The solution is to inspect and repair the transmission and, if necessary, replace it.

The solution is to check that these parts are working properly and repair or replace them if necessary.

To sum up, solving the problem that mountain bikes often need to change shifts twice before they can change gears requires a comprehensive consideration of multiple factors. If you are unable to solve the problem on your own, it is advisable to seek professional help in a timely manner.

1 you this is a tight thread. Adjust the fine adjustment screw at the root of the wire pipe, screw it in, and it's OK until you can go down smoothly at one time, 2

If it's easy to go up and hard to go down, then it proves that your wire pipe and line have been around for a long time, then please replace, because the upper force is determined by your hand strength, don't expect that rear derailleur spring to be as big as hand strength when you go down.

Method steps.

1. Move your finger to position No. 1. Loosen the gearbox with an Allen wrench. Tighten the L-shaped limit screws clockwise with a Phillips screwdriver. The outer plate of the front winding machine is flush with the outer plate.

2. Observe the height of the winding machine and the plate, 1 3 mm.

3. Loosen the L-shaped limit screw in the counterclockwise direction to make the chain bucket retractable. The outer plate and chain are 1 3mm (it is better not to rub the chain bucket on the smallest plate of the tower flyer).

4. Adjust the transmission line, adjust to the 2nd gear, rotate the chainring, and observe whether the 2 8th gear is facing the chain. If rubbing against the outside of the chain frame, tighten the trim screws. Loosen the trimming screws.

Notes:When tightening the trimmer screws, adjust the trim screws to 1 before running.

It is not about finger pulling at all, you only need to loosen the line, adjust the small disk, adjust the lower limit screw, and then pull the line well without pulling too tightly, and then hang the chain on the ** and then adjust the upper limit screw.

This question also bothered me when I first started playing with cars.

1. It may be that the rear derailleur transmission line is loose, and you should be able to adjust the tightness.

2. Debugging the rear dial H and L screws should be carefully debugged.

3. If the tension wheel is oblique, the whole rear dial should be pulled outward or inward, don't feel sorry for the car, don't be too hard when pulling, and correct it.

I'm not a professional mechanic, but I've fixed several mountain bikes.

Similar questions to you.

Is it deformed, you pick the pull line.

The more common reason why the front derailleur does not reach 3rd gear is that the shift line is pulled too tightly, and the front derailleur needs to be repositioned.

If there is an angle between the front derailleur and the pressure plate, it will cause the derailleur to not be dialed in place.

If the front derailleur is positioned too high or too low, the derailleur will not be in place.

If the cable is too tight, the front derailleur will not be able to complete the action, and the derailleur will not be able to dial in place.

As for the probability of damage to the dial or the front dial itself, it is very low.

Therefore, it is recommended to go to the car shop and ask the technician to re-calibrate the position of the front dial and re-adjust the tightness of the cable.

I can't go up when I dial the front dial of the mountain bike to the second gear, and I don't know how to press the dial to go up?

Hello, glad for your question! First of all, your problem is that the mountain bike can't go up when the front dial is in second gear, and I don't know how to press the dial to go up? Secondly, when you adjust the gear shift, you do so while riding, toggling the transmission.

If the gear never goes up, check to see if the transmission is damaged or there is a problem with the chain. That's all for me, I hope it helps! If you are satisfied, please give a thumbs up!

Thank you! Finally, I wish you a happy life!

Summary. Hello, dear, I'm honored to answer for you! <>

Mountain bikes are front-tuned 1st gear shift tightly, and mountain bike transmissions have two. The front transmission is the finger pick, there are 1 to 3 gears, a total of 3 gears, the larger the gear, the larger the diameter of the crankset, that is, the transmission is adjusted to 3 gears, and the chain below will be on the largest crankset. There is also a rear transmission, generally 9 speeds, 12 speeds, taking 9 speeds as an example, the rear transmission has 1 to 9, a total of 9 gears, the larger the number, the smaller the gear, assuming that it is adjusted to 9 gears, the chain is on the smallest gear.

In general, the higher the gear, the harder and faster the bike is, and the lower the gear, the easier and slower it is to pedal. Riding on a flat road, you can have high power, and the general gear is the front transmission in the 1st gear, and the rear transmission in the 9th gear or so. 2. When going uphill, the front transmission should be small in the front and large in the back, the front transmission is in 3rd gear, and the rear transmission is about 2nd gear.

3. When going downhill, it is mainly controlled by brakes, and the front and rear dial adjustment is opposite to that of uphill. The front transmission is in 1st gear and the rear transmission is in 8th or 9th gear.

Turn up a few gears on the mountain bike to tighten the line change.

The teacher plucked his fingers back and forth to adjust to a few tightening speed screws.

Teacher. Hello, dear, I'm honored to answer for you! <>

Mountain bikes are front-tuned 1st gear shift tightly, and mountain bike transmissions have two. The front transmission is the finger pick, there are 1 to 3 gears, a total of 3 gears, the larger the gear, the larger the diameter of the crankset, that is, the transmission is adjusted to 3 gears, and the chain below will be on the largest crankset. There is also a rear transmission, generally 9 speeds, 12 speeds, taking 9 speeds as an example, the rear transmission has 1 to 9, a total of 9 gears, the larger the number, the smaller the gear, assuming that the ignition laughs to 9 gears, the chain is on the smallest gear.

In general, the higher the gear of the bike, the harder it is to pedal the hole, and the faster the speed, and the lower the gear, the easier it is to pedal, and the slower the speed. Riding on a flat road, you can have high power, and the general gear is the front transmission in the 1st gear, and the rear transmission in the 9th gear or so. 2. When going uphill, the front transmission should be small in the front and large in the back, the front transmission is in 3rd gear, and the rear transmission is about 2nd gear.

3. When going downhill, it is mainly controlled by brakes, and the front and rear dial adjustment is opposite to that of uphill. The front transmission is in 1st gear and the rear transmission is in 8th or 9th gear.

The teacher uses the lowest gear in front and the smallest gear in the back.

Teacher. The front is 1st gear, and the rear flywheel is best used with 123rd gear.

If the front is 1st gear, the rear flywheel is best used with 123rd gear. That is, one spike of the chain is placed on the smallest crankset, and then the other end of the chain is set on the three largest flywheels. One point to note here is that you should never use the largest crankset to carry the largest flywheel, and do not use the smallest crankset to carry the smallest flywheel.

This will not only speed up the wear and tear of the crankset flywheel and chain, but also make it easy to drop the chain while riding.

The teacher is like twenty-one gears, the first gear is tightened, the screws are tightened, and the last few gears are tightened.

9-speed tight shifting line.

Summary. Adjustment method of the rear dial fine-tuning screw: 1

Guide wheel tension adjustment screw, turn the screw clockwise to keep the tensioner away from the tower wheel, turn this screw counterclockwise to make the tensioner close to the tower wheel. 2.Adjust the screws of the transmission line, turn the screws clockwise to loosen the transmission line, and turn the screws counterclockwise to tighten the transmission line.

3L H adjustment screws (high and low limit screws), L screws limit the chain to the maximum flywheel position to prevent the chain from falling off, H screws limit the chain to the minimum flywheel position to prevent the chain from falling off.

Add some sail oil to the line pipe to lubricate it, especially in the bent place, the oil must be penetrated, and if possible, pull the line pipe out and clean it. The resistance inside the wire pipe is too large, and the spring of the transmission is not enough to return to this situation, and you see the possibility of water and ash entering the wire pipe. Then try to twist half a circle before the fine-tuning screw with hail wire for the variable speed finger.

However, most of the cases are caused by the previous situation, and if it doesn't work, change the conduit.

Adjustment method of the rear dial fine-tuning screw: 1Guide wheel tension adjustment screw, turn the screw clockwise to keep the tensioner away from the tower wheel, split Qin counterclockwise Zhaohui turn this screw to make the tensioner close to the tower wheel.

2.Adjust the screws of the transmission line, turn the screws clockwise to loosen the transmission line, and turn the screws counterclockwise to tighten the transmission line. 3L H adjustment screws (high and low limit screws), L screws limit the chain to the maximum flywheel position to prevent the chain from falling off, H screws limit the chain to the minimum flywheel position to prevent the chain from falling off.