How to maintain consistency between different gear chains of variable speed bikes

The role of the bicycle transmission system.

The function of the bicycle transmission system is to change the speed of the bicycle by changing the coordination of the chain and the gear discs of different front and rear sizes. The size of the front chainring and the size of the rear chainring determine how hard the Solomon bike rotates the pedals. The larger the front chainring, the smaller the rear chainring, and the more laborious it is when pedaling.

The smaller the front chainring and the larger the rear chainring, the more relaxed it is when pedaling. The principle of the transmission system The basic principle of the transmission is the same, the position of the chain is changed by translating the guide wheel or guide chain groove through the parallelogram structure. The guide wheel of the rear derailleur holds the position of the chain, while the tension wheel ensures that the chain has a certain tension and can be tightly wrapped around the gear.

The tension wheel is fixed to the swing arm and pulled in by a spring. Due to the large range of mountain bike flywheel teeth and the small range of road bike tooth count, the rear derailleur swingarm of Solomon mountain bikes is usually longer to match the tension variation of the larger chain.

How the transmission system is tuned.

Step 1: Make sure that each cable is in the correct position, that it is snapped into the bayonet of the Solomon frame, and that the transmission cable is installed correctly. Then tighten the variable speed adjustment screw and loosen it back 3 turns, and the adjustment screw on the shift lever is similarly adjusted.

Straighten the wire as straight as possible and tighten the brake cable fixing screws on the rear transmission.

Step 2: Shift the lever to the middle setting, such as 4th gear. Then adjust the variable speed adjustment screw on the rear derailleur. When the chain is on the corresponding tooth, the guide wheel and the tooth are on the same plane.

Step 3: Adjust the limit screw: The function of the limit screw is to prevent the chain from falling out of the smallest piece of gear or getting caught between the flywheel and the wire.

You can adjust the minimum piece gear first. Release the shift wrench to its lowest setting. See if the smallest gear and guide wheel are in the same plane.

Otherwise adjust the screws. Usually marked with H. Adjust to the same plane.

Then adjust the big gear side. The difference is to loosen the screw on the L side first, and then tighten it to the same plane of the two gears after the chain is hung up. That's basically the way to adjust.

The next thing is to give it a try. Let's try to change the speed of space. Normal should be supple and not beating.

If the upward speed change can not be in place in time, it means that the line is not pulled enough, you need to turn the adjusting screw out a little counterclockwise, usually half a circle and half a circle of adjustment is enough. If you can't change gears, loosen it a little. Then take a ride and see.

Usually, the new shift line needs to be adjusted slightly after a period of shifting. Adjustment of the front derailleur: Front derailleur adjustment (in the case of Shimano Deore LX):

Repeated debugging is carried out according to the following simple rules: H screw - used to adjust the positioning of the chain at the most ** piece. Counterclockwise (screwed out):

The front rake arm is away from the seating tube; Clockwise (screwed in): The front derailleur arm is close to the seating tube. Note:

Counterclockwise (unscrewed) to grasp the scale, too much, will cause the chain to fall off the plate, stuck between the crank and **. l Screws – used to adjust the positioning of the chain at the smallest platter. Counterclockwise (screwed out):

The front dial arm is close to the seatpost; Clockwise (screwed in): The front dial arm is away from the seating tube. Note:

Counterclockwise (unscrewing) to grasp the scale, too much, will cause the chain to fall off the plate, stuck between the bottom bracket and the small plate.

Just remember the left front.

The wheel right rear wheel itself is in the debugging on it.

The rear wheels can be adjustedTransmissionuntil the rear wheel screws are tightened so that the chain is tightened.

The tightness of the bicycle chain is generally not different from the upper and lower amplitudes of two centimeters, and the bicycle is turned over and put it away; Then use a wrench.

Loosen the nuts at both ends of the rear axle and loosen the brakes at the same time; Then use a wrench to tighten the ring nut on the side of the flywheel end, and the chain will be slowly tightened; When you feel like you're almost there, stop tightening the ring nut, straighten the rear wheel to the middle of the fork, then tighten the axle nut, and turn the car over when you're done.

Precautions for variable speed bikes.

Don't shift gears on the ramp, be sure to shift well before entering the ramp, especially uphill, otherwise you may lose power in the middle of the shift because the transmission is not yet complete, which will be very troublesome.

The uphill slope theoretically adopts the principle of the smallest in the front, that is, the first gear, and the largest in the back, which is also the first gear, but the actual rear flywheel gear can be determined according to the actual slope; The downhill is theoretically based on the principle of the largest car in front, that is, 3 gears, the smallest in the back, and 9 gears, but it also needs to be decided according to the actual slope and length.

Summary. 1. If the front derailleur (the transmission of the front crankset) near the side of the frame touches the chain, it is caused by the chain being too tight. You can adjust the fine adjustment screws on the left handlebar.

Rotate the trimmer screw clockwise to observe the gap between the chain and the derailleur plate, and the adjustment can be completed when the gap reaches about 1 mm.

The mountain bike chain touched the front crankset transmission, how to adjust it.

Hello, the chain of the mountain bike hits the transmission of the front crankset, the solution:

1. If the front derailleur (the transmission of the front crankset) near the side of the frame touches the chain, it is caused by the chain being too tight. You can adjust the fine adjustment screws on the left handlebar. Rotate the trimmer screw clockwise to observe the gap between the chain and the derailleur plate, and the adjustment can be completed when the gap reaches about 1 mm.

2. If the front derailleur (the transmission of the front crankset) is far away from the frame and the derailleur plate touches the chain, it is caused by the chain being too loose. You can adjust the fine adjustment screws on the left handlebar. Rotate the trimmer screw counterclockwise to observe the gap between the chain and the derailleur plate, and the adjustment can be completed when the gap reaches about 1 mm.

I hope the above is helpful to you If you are satisfied with me, please give me a thumbs up

This is easy to do... Minor issues.

There are two possibilities for this.

1 The strength of the front pull cable is not adjusted properly.

2 l limit screws are too tight.

Solution: 1 There is a knob at the connection between the front dial or the front finger dial and the wire pipe Turn the pedal with the left hand Turn the knob with the right hand Turn the knob in which direction to twist yourself Try If you twist in one direction, the problem is getting more and more serious. . . Instructions should be twisted in the opposite direction.

2 There are two small screws on the front derailleur, find the one that says "L" in it, and loosen it a little with a Phillipsdriver.

It may be one of the ways to solve it, or it may be possible to continue to ask about both problems.

There are three gears on the drive shaft of the shifting bike, and the number of teeth is 48, 36, and 24; There are four gears on the rear axle with 36, 24, 16, 12 teeth. Under normal circumstances, the transmission does not use the 7th and 8th gears of the rear derailleur, and the gears are too small, which affects the life of the chain.

And the transmission is best not to hang 1-8 gears, 1-8 gears are the smallest gears, flywheels are the smallest gears, the chain is not straight, it is oblique, so it is not good for the chain, it will increase the speed of the sun brigade and affect the life of the chain, and it is not good for the transmission.

In the same way, 3-1 gear is not good, because the chain is also oblique. Two do not ride for a long time, if you park the car, you can change to 1-8 gears, so that the front and rear are the smallest gears, which can relax the rear dial spring and prolong the life of the rear dial, but 1-8 is not a gear for riding, before riding, that is, before people get on the car, it is best to change to 2-4 gears.

It may be that the transmission line is relatively loose, and it is enough to tighten the transmission line, and the second is to adjust the limit screw, so that there is a little gap between the chain and the front transmission, and it will not grind.

Fine-tune and rotate the left-hand transmission, different brands of transmissions have different specifications, so it is possible to rotate clockwise and counterclockwise, just try it.

It is also possible that the transmission line is aging or broken and the rebound is not enough, so it is recommended to replace a transmission cable.

It is also possible that there is oil stained on the front dribple and dust rubbing the chain, which can be washed with a stain remover that can be bought at a hardware store, or you can use a special bicycle cleaner.

If you are a friend with tools, it is best to correct it yourself: adjust the gear to the small tooth, remove the wire rope, tighten the reload, and unscrew out a certain right limit screw. Generally speaking, it is like this!

The front derailleur has a fine adjustment screw under the adjustment.