山地车飞轮齿数和踏频关系及正确应用

山地车飞轮齿数和踏频关系及正确应用 The speed and frequency relationship and the correct application of mountain bike Step frequency: 1 minute the number of times the feet are pedals; 9 segment gear number (3-1) : 44, 32, 22 flywheel gears (9-1) 11 13 15 17 20 23 26 30 34 The best step for flat road is around 90, while the slope is around 70. Depending on the speed of this table, you can determine the timing of the change, and of course the actual situation varies from person to person, and you can find the best step for yourself by figuring out how to do it. Mountain bike gear frequency Bike is a tool which is used to work with the leg movement, depends on people's legs, trample pedals, through the chain that drives the rear wheel rotation, and make the bicycle move forward, and the flywheel gear disk with represented by the transmission system, it is very important, but riding a bicycle is not only using the gear ratio, the gear ratio is usually with feet cadence, can achieve the result that complement each other. Drivers ever ride experience, is at the time of climbing, it is difficult to adjust to fit their cadence, gear ratio is too large, the feet can't trample, unable to load large gear ratio; And the gear ratio, using too light is not let their cadence, fast legs make not force and fatigue quickly, how to reach equilibrium, which is a science, let us a preliminary understanding of the secret! Gear ratio calculation So-called gear ratio, is used after the number of teeth on the gear disk in addition to the number of teeth on the flywheel, the resulting value is equal to the gear ratio, assuming that front tooth plate teeth for 44, flywheel gear for 11, after the stamp on the gear ratio of 44/11 = 4, the resulting number four is trampled by the gear ratio at present. If the pure theoretical calculation, with 44 tooth disk trample a circle, will drive back after 11 teeth flywheel rotating four laps, if multiplied by the rear wheel (26 inch) wheel diameter, can be found that trample a circle, the car can be 8.3 metres forward (26 * 2.54 * 3.14 * 4 = 829, about equal to 8.3 meters). Gear than 4, however, is not light gear ratio, requires considerable legs to step, and large gear ratio, easy to wear chain, tooth plate, flywheel and even the life of the transmission. The variable speed bike is developed at a single speed, with two tablets, three slices and one single chip. The flywheels are five, six, seven, eight, nine, ten, and now there are eleven. The most common variable speed system in the mountain bike is the first three speed and the nine speed, which is 24 or 27 speeds. Of the tooth slice of tooth before specifications is 22 22,32,44,32,42 or more, and the back of the specifications of the flywheel is for flywheel for the 11-13-15-17-20-23-26-30, 9 speed for 11, 13, 15, 17, 20, 23, 26, 30, 34). And drivers can count the number of teeth on the car how much for each, but if you have you carefully to figure out the gear ratio, you will find some of the gear ratio is quite close to a period of variable speed of mountain bike, 27 May actually speed of only about 20 segment, so with speed to some skills, and if the change to the same gear ratio, the loss of the effect of variable speed. Here's a look at the gear ratio of the average 27 speed changes: When the riding uphill, to from a large plate of reduced to the tooth plate, and don't want to suddenly cadence increase too much, but, after reduction gear disk will conveniently heavier flywheels after two pieces, this will be a little lighter than the original gear ratio, and not let cadence up too much, cause drivers to trample too nasty, breathing out of balance and rhythm. Mountain motor, the gear ratio on the mechanical application, of course, want to rely on the rider's leg with, and the two together is the concept of cadence, and the appropriate cadence is also one of the important key. Cadence of calculation is in 10 seconds, for one unit, calculated within 10 seconds, a feet trample a few laps, the weight of six times they get every minute cadence. There are a lot of car friends riding on the tarmac in the flat road, and the pedal frequency is about 60 per minute, This cadence is only suitable for general recreational rider, because such frequency the burden of the leg muscles is quite large, the gear disk with itself and the wastage of the flywheel is not small, in this recommendation fellow cyclists, riding the level road asphalt, cadence is best at around 90 per minute, while climbing maintained at around 70. Each has its appropriate cadence, if cadence is too high, easy to cause respiratory regulation (urgent) and hip because of excessive swing and feel the pain. If the pedal frequency is too low and the leg is prone to cramping, the damage to the disc and the flywheel is also great. It is recommended that you increase the speed of the speed in order to bring the continuous velocity with the lower gear ratio. (all of these are at constant speed) Bike is a kind of human as the car power source, if you have some blindly going faster, use of heavy gear ratio, higher speed, but it must take into account their cardiopulmonary function and muscle strength. When found himself the power of the rotational speed can't keep, variable speed can be utilized to maintain a certain speed, never will change the car as a single speed car ride, suggest that drivers from low gear ratio, high above the cadence to experience the essence of cycling, reduce unnecessary physical harm! Recommended rotation number: A professional road car player The average is 110 90 Climb the slope 90, 70 ~ 75W A mountain bike climbs a hill to ride a small secret Riding uphill, flywheel is best reserved variable light behind one or two pieces of variable space, so in the face of sudden small steep slope or want to excel in the slope, and can change space, but the premise is to rider has enough strength, if steep or leg strength really insufficient, or use the lightest tooth to ride. tip If everybody accepts gear than it was too much trouble, in this to teach you a by using the method of speed to separate the variable speed, if you under 10 km per hour, will use the smallest gear disk to ride, if between 10 ~ 30 km per hour, the utilization of fluted disc, if in 30 ~ 60 kilometers per hour above, with large fluted disc mounted, the flywheel has used by fellow cyclists consider, this way, it is relatively easy to understand! . Note there are many cyclists often before transmission becomes a small, big big before or after, and even after the former small to big, in fact that the damage to the transmission and the chain is great, because these are extreme distortion of chain, it is easy to excessive tension and deformation, make an effort to trample, the harm of fluted disc and the flywheel is also quite big, the best way to change is to make the chain no matter in which tooth set as far as possible to maintain a straight line (viewed from the rear), such as when the chain in the largest toothed plate, 2, 3, 4, the flywheel is best for a tooth.