Advice 1: How many speeds is the bike

Modern bikes have mechanisms for shifting, which works by moving the chain from one star to another. Therefore, the maximum number of speeds depends on the number of stars.
Bike with gear shift
Modern bikes maximum number of speeds can reach 30. The number of speeds depends on the number of the front and rear of the stars. The shifter on the bike you need for a comfortable ride on rough terrain. For example, at arrival on the hill, you should shift gears on downshifts, and to go with the slides should be at a higher transmission. Switching speed, when necessary, the cyclist saves your hand.

How to determine the number of speeds

The nominal number of speeds is determined by the combinations of the front and rear of the stars. For example, if the bike stars 10 rear and 3 front, the nominal volume is equal to 30, and if the back 9 and then 27. However, there is one caveat — the actual number of speeds that can be used will be less. This is because due to misalignment and incorrect chain tension you should not use all possible combinations of stars.

Optimal switching speeds

In order to avoid tilting, and jump-out circuit is recommended to switch the speed as follows:
• The first front star running back with the stars in the combinations 1-1, 1-2, 1-3 and 1-4.
• The second chainring works with back stars in combinations 2-4, 2-5, 2-6 and 2-7.
• The third chainring works with back stars in combinations 3-6, 3-7, 3-8 and 3-9.

The result is that the bike with three front and nine rear stars nominally has 27 speeds (3 x 9=27), but in fact it is used only 12 speeds. And that's enough to travel through the terrain with any relief.
It is worth noting that to adhere to this scheme is entirely optional, but when using the optimal combinations of the shift of stars is significantly reduced chain wear.

How to shift gears

When riding against the wind, the sand, clay, wet mud, or uphill, you need to "dump" forward gear. Then it will be easier to pedal, to maneuver and gain speed.

The first forward gear is optimal for lifting, if you don't want to put much physical effort. The second transfer is suitable for small UPS and driving drogam. The third forward gear (the big star), it is recommended to switch while riding around the city. While reverse gear is switched in accordance with the above scheme of switching speeds.

Advice 2: How to shift gears on a bike

Switch speed on the bike is easy. Just follow some simple rules to make your riding more comfortable and efficient. In addition your shifters longer serve you, allowing you to save a lot of money.
If you do not monitor the gear shift, it will break down quickly
Switching gears during the climb. There is no need to switch speed if necessary, or you risk losing the rhythm and momentum of your movement. Also, do not change gears during fast pedaling, because it will lead to rapid wear of those parts which during braking subjected to the greatest load.
The most common mistake cyclists-fans is a rare use of the front derailleur. This is probably explained by the fear to fly over the handlebars of the Bicycle upside down. Of course, if the speed is very large, the front brake is better not to use or to use them for gradual braking. However, the front brakes twice as efficient as the rear, so it's worth thinking about in which situations what brakes are best to use.
You have the opportunity quickly enough to gain the necessary speed with a single switch on the front of the cassette (instead of two on the rear). Entering the rhythm of the movement, you can with the rear derailleur to adjust the transmission more accurately. Remember that first you need to choose a forward gear and then to adjust the reverse switch.
If you prepare to descend, the right gear it is better to choose in advance. The descent time for this you will be gone. There will have to monitor the control and maneuvering of the bike.
As the movement rate of the surrounding countryside, to pre-select the right gear. Speed on the bike you should choose the same as the car: its optimum gear for every speed.
Useful advice
If the speed switch by themselves, it does not mean deterioration or breakage of the system components switching speeds. Most likely, it in the grass or dirt caught in the chain, sprockets or rehandling. Often clean and lubricate the chain, gears and sprockets. Then the transmission will switch smoothly and clearly, and then riding will be more comfortable;

It is also important to feel good in your bike to hear all the extraneous sounds and determine where they come from. Foreign metallic sound often occurs because of stretching of the chain, why wear out the rest of the bike. At least once a season try to change the chain.

Advice 3: How many speeds can the bike

Modern bike - high-tech means of transportation on two wheels. If earlier for riding enough only one system pedal the rear wheel", now they have a system of speeds. It is necessary to understand how many speeds can the bike.
How many speeds can the bike


Star bike

It's a good point. The number of gears depends on their number. On most bikes manufactured now (highway and cross-countrey) stars are fitted in the rear wheel and the cassette (where the pedals are). To find out how many speeds a particular bike, you need to multiply the number of back and front of stars. For example, if the back 7 stars, and the front is 3, then the bike is 21-speed.

The number of speeds can range from 10 (5 stars rear and 2 front) up to 30 (10 stars back and 3 front). Bike manufacturers often prefer to produce bikes with 21 speeds. This is alloy bike with front shock-absorbing fork, designed for riding not only in the city, but also on the road. A large number of different speeds road bikes with narrow wheels with a diameter from 27 to 31 see Smaller children's bikes.

A bit about proper gear shifting

In order to avoid premature wear of the cassette, chain, and system shift in General, should observe some simple rules. First, you should not shift gears during the climb. The chain tension and so not weak, and even at the chain have instant load during leaps from one star to another. You should choose the slow speed for lifting (in other words, choose the biggest star in the back and smallest in front. Speed switch as for the rear wheel and cassette. Put simply, to lift and selects the first speed on both switches.

Second, is to change the speed only while riding the bike, when spinning pedals. Otherwise, during the launch of the bike people can't hear the nice sound from the chain. This will affect its wear.

The third rule is the difference between the speeds (star circuit) must not be greater than 4. That is, you should not choose the lowest speed for front/rear star and the highest to another. Because of this, the chain can stretch faster than it is designed by the manufacturer of the chain. A stretched chain will damage the gear shifting system in General. It's not very nice and not the cheap repair. The cost of a good switch system may be more than one thousand rubles.

Last but not least, you should regularly lubricate the chain. Signal that it's time to do it, can be foreign metallic noise from the chain or peculiar rustling noise while riding. If the bike is operated carefully and not on the roads, will need to wipe the chain dry with a rag from dirt and then lubricated with special lubricant for Bicycle chains. If the bike is a frequent guest on country roads or sandy beaches, before greasing'll need to wash the chain with kerosene or a special mixture to clean the chain.

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