Variable speed bike 18 speed transmission used?

The middle gear is usually used for the front shifter. The smallest gear is rarely used unless you're on a very steep slope. (If you want to use the rear gear is best in the rear gear) The largest gear is quite useful in the city, especially when the road surface is good and the road condition is good.

If you want to use it, the rear gear should be the best 6) The rear gear is the most often variable. Usually use 2 when you start, and wait for the speed to go up. The speed is not enough, so go all the way up to 6.

If that's not enough, use the biggest one for the front shift. --When you go uphill, it depends on the slope and your motivation. When the wind is downwind, use almost.

Bicycle transmissions are developed from single speeds. Generally, there are two cranksets, three cranksets, and one crankset. The flywheel has 11 pieces.

Usually the number of speeds refers to the number of cranksets * number of flywheels, such as 18 (3 * 6 or 2 * 9) speed, 21 (3 * 7) speed. With the shift lever, front and rear transmissions, the transmission car can have different transmission ratios to produce different driving forces, to adapt to different road surfaces or headwind, downwind, uphill, downhill and other different situations, so that the rider can save physical strength, not to change the speed. The best way to ride fast is to increase the frequency (the same concept as the speed of the car), rather than blindly increasing the gear ratio, because large gear ratios are more laborious and people tend to get tired.

At the same frequency, on the same (behind) flywheel, when the chain is on the (front) big gear, it is faster than on the (front) pinion, but it is also more laborious. When the same (front) gear is on the same (front) gear, when the chain is on the (rear) pinion pinion it is faster than on the (rear) big gear. Here's the world's top mountain bike transmission.

As an additional reminder, be sure to shift the speed while riding.

Variable speed self-propelled state late call carThere are two shifting gears in the front and rear, and the front gear has three gears, which are controlled by the left handlebar. The higher the gear, the harder it is to pedal. The faster the speed, the lower the gear, the easier it is to step on, and the slower the speed.

This kind of transmission that rotates back and forth.

Called the rotary dial, the left dial controls your front derailleur, referred to as the front derailleur, when you twist the left derailleur (there is a feeling of tightening in the direction), at this time, the front derailleur will be outward, when you are riding, the front derailleur will dial the chain to the crankset (the gear connecting the pedal in front is called the crankset) Another gear.

In order to achieve the effect of changing speeds, the principle of rear derailleur is the same! In short, by twisting the rotary dial, the front and rear waves are controlled to change the gears used to achieve the effect of changing speeds.

Changing speeds is nothing more than two effects: lighter and heavier. Suitable for climbing when lighter, the smaller the crankset, the bigger the flywheel, the lighter the foot! When it becomes heavier, it is suitable for acceleration and high-speed driving, when the crankset should be large and the flywheel should be small!

The crankset and the flywheel are not casually matched, the principle is that the innermost crankset is the innermost 1, 2 flywheels, the outermost crankset is the outermost 1, 2 flywheels, the middle crankset should be matched with the middle (do not match the flywheel at both ends), the front 1 and the rear 1, 2 - this is a light gear, the front 2 and the rear 2, 3, 4, 5 ......It is the middle gear, and the largest crankset is the heaviest gear against the smallest flywheel.

Summary. Hello dear, glad to answer for you. Here's how to adjust a transmission on a bicycle:

1. When the vehicle is going uphill, first adjust the left side to 1st gear. 2. Adjust to 1st gear on the right. If you find it strained, you can continue to adjust it up to 2nd or 3rd gear.

3. On the flat road, the left side can be adjusted to 5, 6, and 7 gears. 4. When going downhill, there are three gears on the left, and 5, 6, and 7 gears on the right can be used.

Hello dear, glad to answer for you. The method of answering the question of a transmission of the bicycle is as follows: 1. When the vehicle is going uphill, first adjust the left side to 1st gear.

2. Adjust to 1st gear on the right. If you feel that the cleaning liquid is laborious, you can continue to adjust it upwards to 2nd or 3rd gear. 3. On the flat road, the left side can be adjusted to 5, 6, and 7 gears.

4. When going downhill, there are three gears on the left, and 5, 6, and 7 gears on the right can be used.

Pro, the role of the transmission is that when riding on ordinary roads, the front chainring (operated by the gear lever on the left) is fixed in the middle (or the maximum chainring 1). It's easier to understand by using only the rear chainring (operated by the gear lever on the right). The smallest front chainring is used when going uphill.

How to choose the gear of the rear chainring? This is determined by the number of rotations of the pedal: the number of rotations of the front chainring (central axis) for 1 minute. So how many rotations are more suitable for judging Fuhuai?

It varies according to the strength of the feet, the technique, and the cardiopulmonary function. Generally 70 80rpm, 2 is more suitable. 1. When you want to speed up, start with a lower chainring (the larger chainring at the back), and change to a higher gear (small chainring at the back) as the speed increases.

2. The speed will be reduced when going uphill, and the gear ratio will be reduced to maintain a certain pedaling strength. 3. When downwind, the speed will be accelerated, and the gear ratio will be increased to maintain a certain pedaling strength.

Variable speed bikes.

The principle of shifting:

After the power added by the cyclist to the pedal is "amplified" by the "chain disk", it is transmitted to the "flywheel" by the chain, and the "flywheel" then drives the rear wheel to rotate, thereby driving the bicycle forward. The gear-shifting bicycle uses the different gear ratios of the chain disc and the flywheel to change the forward speed.

When the "**" of the chain disc is combined with the "Xiaofei" of the flywheel, the "**" rotates a circle, and the "Xiaofei" will rotate many times, so that the "Xiaofei" will drive the rear wheel to slide forward for a long distance, so the speed is the fastest at this time.

However, at this time, because the wheel radius of the pedal is not much different from the shaft radius of "**", the force generated by the power added by people on the pedal is not too large. At this time, although the speed of the bike is faster, the rider will put in more power.

When the "small disk" of the chain disc is the "big fly" of the flywheel.

When combined, the "small disk" rotates once, and the "big fly" rotates not too many times, so that the distance of the rear wheel driven by the "big fly" is not large, so the speed of the car is the slowest at this time.

However, at this time, because the wheel radius of the pedal is very different from the shaft radius of the "small plate", the power added by people to the foot pedal will produce a large driving force on the "small plate". At this point, the speed is slow, but the rider puts in the least amount of power.

You can use the following methods to adjust the transmission bicycle transmission.

1. When the vehicle is going uphill, first adjust the left side to 1st gear.

2. Adjust to 1st gear on the right. If you find it strained, you can continue to adjust it up to 2nd or 3rd gear.

3. On the flat road, the left side can be adjusted to 5, 6, and 7 gears.

4. When going downhill, there are three gears on the left, and 5, 6, and 7 gears on the right can be used.