Modern bicycles have gear shifting mechanisms that operate by jumping the chain from one sprocket to another. Therefore, the maximum number of speeds depends on the number of stars.
Modern bicycles can have a maximum number of speeds of up to 30. The number of speeds depends on the number of front and rear sprockets. A speed switch on a bike is essential for a comfortable ride on rough terrain. For example, when driving on a hill, you should switch the speed to lower gears, and go down a hill in an increased gear. By switching speeds when necessary, the cyclist saves energy.
How to determine the number of speeds
The nominal number of speeds is determined by the combination of front and rear sprockets. For example, if a bike has 10 rear sprockets and 3 front sprockets, then the nominal number of speeds will be 30, and if there are 9 sprockets at the back, then 27. However, there is one caveat - the actual number of speeds that can be used will be less. This is because all possible sprocket combinations should not be used due to skew and incorrect chain tension.
Optimal gear shifting
In order to avoid skewing and slipping of the chain, it is recommended to change speeds as follows:
• The first chainring works with chainrings in combinations 1-1, 1-2, 1-3 and 1-4.
• The second chainring works with chainrings in combinations 2-4, 2-5, 2-6 and 2-7.
• The third chainring works with chainrings in combinations 3-6, 3-7, 3-8 and 3-9.
The result is that a bike with three front and nine rear sprockets nominally has 27 speeds (3 * 9 = 27), but in fact it will only use 12 speeds. And this is enough for trips across terrain with any terrain.
It is worth noting that it is not at all necessary to adhere to this scheme, but when using the optimal combinations of switching stars, chain wear is significantly reduced.
How to switch gears correctly
When driving upwind, on sand, clay, wet mud or going uphill, it is necessary to "drop" the forward gear. Then it will be easier to pedal, maneuver and pick up speed.
First forward gear is ideal for lifting if you don't want to put in a lot of physical effort. The second gear is suitable for small climbs and driving on forest paths. It is recommended to shift into the third forward gear (the largest sprocket) while driving in the city. At the same time, the reverse gear is shifted in accordance with the above gearshift pattern.
