1, car types, road bikes, mountain bikes and recreational vehicles will affect people's play to varying degrees.
2, the car condition, the degree of cooperation between transmission devices is good or bad. Whether it is suitable for the rider's body shape.
3. Physical fitness, training level, pace frequency and strength.
4, road conditions, road quality, traffic flow, uphill and downhill, etc.
Generally speaking, it takes a long time to train if you want to keep the driving speed above 20km/h for a long time. Most people measure the instantaneous speed, and it usually takes more than an hour to evaluate the speed of bicycles.
Frequently asked questions about bicycle failures: What should I do if the chain falls to the outside of the crank? Answer: Adjust the high screw (H) of the front transmission clockwise. Q: What if the chain falls to the fifth level of the frame (the middle bottom of the frame)? Answer: Adjust the low screw (L) of the front transmission clockwise. Q: It is difficult for the chain to shift from the middle toothed disc to the big toothed disc. How to deal with this situation? Answer: First adjust the front transmission height screw counterclockwise, and then adjust the front transmission handle screw counterclockwise. After the chain is transposed to the big toothed disc, the chain should not rub the outer guide plate of the transmission. Q: It is difficult to change the chain from mid-range to small gear. How to deal with this situation? Answer: First adjust the low screw of the front transmission counterclockwise, and then adjust the handle screw of the front transmission clockwise. After the chain is transposed to the pinion, the chain should not collide with the guide plate inside the transmission. Q: What should I do if the chain on the flywheel falls off to the frame side? Answer: Adjust the high adjusting screw of the rear derailleur. Make the guide wheel and the minimum flywheel on the rear transmission on the same vertical plane. Maintenance and maintenance of bicycles >> How to use the bicycle transmission The function of the bicycle transmission is to change the speed of the vehicle by changing the cooperation between the chain and the gear plates with different front and rear sizes. The size of the front toothed disc and the size of the rear toothed disc determine the strength of the bicycle when turning the pedal. The bigger the front tooth plate is, the smaller the rear tooth plate is, and the harder it is to pedal. The smaller the front toothed disc is, the easier it is to tread when the rear toothed disc is bigger. According to the ability of different drivers, the speed of the bicycle can be adjusted by adjusting the size of the front and rear toothed discs, or to cope with different road sections and road conditions.
1, bicycle transmission, the combination of the front 3-toothed disc and the rear 9-toothed disc can be changed to 27.
2. When the pedal rotates, the front toothed disc rotates, the force is transmitted to the rear toothed disc through the chain, and the wheel moves forward. The size (number of teeth) of the front toothed disc and the size (number of teeth) of the rear toothed disc determine the strength when turning the pedal.
3. The bigger the front tooth plate is, the smaller the rear tooth plate is, and it feels laborious to pedal (the distance that the bicycle moves forward becomes longer).
4. The smaller the front tooth plate, the bigger the rear tooth plate, which is easy to trample (the distance of the bicycle is shorter).
5. Bicycle rides when it starts, stops, goes uphill, downhill, windward and windward. No matter under any conditions, you can keep a certain speed (bicycles can move forward quickly or slowly, and you can keep a certain pedaling speed and torque, so you need a gearbox.
6. If you don't increase your own strength, it is impossible to ride quickly by increasing the gear ratio. This was quickly discovered in the actual riding process. When riding by increasing the transmission ratio (high torque and low speed), the most suitable riding (combination of torque and speed that releases the most suitable energy) cannot be achieved. This will increase the burden on the knees and become the cause of various obstacles. (Note: It is best to ride at a constant speed. Fast and slow is a kind of torture to your knees. If you don't care too much for a short time, you will have various problems after a long time. Adjustment method of mountain bike transmission >:>
Bicycle transmission and transmission ratio transmission are like a lever, which is used to change the ratio of forces needed to do work. The ratio of this change is called transmission ratio. As far as bicycles are concerned, the transmission ratio depends on the relative sizes of crank gear and flywheel chain disc. When the crank rotates completely 1 turn, the 52-tooth big toothed disc will drive the 13 toothed chain disc to rotate for 4 turns, and the transmission ratio is 4: 1.28, which can drive the 28-tooth chain disc to rotate 1 turn, and the transmission ratio is1.
In a steady state, riding can generate an average of 0. 125 horsepower, and the energy is most effective when the pedaling rhythm is 55-58 laps per minute. The purpose of the transmission device is to help the knight maintain an effective rhythm, and the key to effectively use the transmission is the ability to predict, that is, to change the speed before the actual needs, so as to maintain a stable rhythm.
When switching from high speed to low speed for climbing, the predictive ability is the most important, because the speed of modern transmission is fast and reliable, but changing the speed half a beat before climbing can reduce the pressure when pedaling.
However, it is absolutely not allowed to change from the smallest toothed disc to the smallest chain disc or from the largest toothed disc to the largest chain disc during speed change. This speed change mode will make the chain switch angle too large, which will not only reduce efficiency, but also increase wear.
When the crank of the chain on the small toothed disc and the big chain disc rotates 1 turn, the distance that the bicycle moves is shorter; When the chain is on the big toothed disc and the small chain disc, the bicycle moves for a certain distance. Transmission ratio and common sense of bicycle transmission >:>
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