Bicycle Speed ​​Dial on the steering wheel: installation and adjustment

The switch of speeds on a bicycle on a wheelIt is used in equipping city, mountain and sports modifications. Comfort and safety of movement depend on the quality work of this unit. Before operating the vehicle, check the operation of this unit. Speed ​​adjustments are made by stretching or loosening the control cable.

general information

The modern switch of speeds on a bicycleon the handlebars gives new opportunities in optimizing driving on different sections of roads. On such a bike it is much easier to perform various tricks, navigate on uneven and mountain tracks. The main thing is to properly configure the node in question. To do this yourself, you need to learn the basic parts of the mechanism, including the shift lever and the transmission.

The last block includes a set of parts that allow you to take part of the load transferred to the cyclist. It also facilitates a climb uphill and cross country traffic.

Device

The transmission unit includes the following main elements:

• The handle of the switch of speeds on a bicycle.
• Front lock, which helps the chain to move along the leading sprockets. He is fastened to the frame near the pedals.
• A system of stars of different diameters and number of teeth, mounted on the connecting rods with special bolts.
• The rear switch, which is in the area of ​​the rear wheel and allows you to move the chain along the leading sprockets of the cassette.
• Ratchet, which includes several stars, differing in the number of teeth and the size. On more expensive models, this unit is fixed to the drum.
• Chain. Transmits the specified speed from the pedals to the wheels. Requires regular cleaning and lubrication.
• Manchets. Through these elements, the cyclist controls the speed switch on the bicycle on the handlebars. A piece is installed near the handles, the right cipher is responsible for the rear controller, the left one for the front controller. The principle of operation of the mannequins consists in changing the tension of the cable, as a result of which the speeds are switched.
• Cables. They connect the cipher with a switch and are responsible for the correct transition between speeds, which largely depends on the correct tension of the cable.
• Shirt. This part is a rigid tube passing through the cable and fixed to the frame.

It is worth noting that the most reliable chains are elements of matte gray color. Parts with a yellowish tinge are of poor quality, and nickel-plated chains refer to the middle segment.

Principle of operation

Before you learn how to adjustthe switch of speeds on a bicycle, it is necessary to understand its principle of operation. The functioning of the node under consideration consists in pulling the cable of the front controller, which makes it possible to transfer the frame to stars of larger diameter. When the cable is loosened, the chain is thrown onto smaller sprockets.

The switching itself is done directlywith the help of dummies of the cipher type, located on the handlebars. The rear part is controlled by the right shifter, the front switch is controlled by the left analog. As a result, the chain is moved among the front or rear stars.

What are the best bike speed switches?

There are three main types of bicycle gear change mechanisms:

1. The device of external influence.
2. Internal switching mechanism.
3. Combined system.

The inner type appeared before the external mechanism. Back in 1902, Sturmey-Archer manufactured a similar analog, which can be called the progenitor of multi-speed bushings. Let's consider each of these types in more detail.

Internal type of switching of speeds

At the heart of this design areplanetary bushings without the use of cassettes. The transmission assembly includes only two stars. All elements are hidden inside. As a rule, in such a mechanism there is no front derailleur on the bicycle on the handlebars.

This device is used for walking,highway, urban and collapsible bikes. The working system is located inside the rear planetary tube. The adjustment of such a switch is best entrusted to specialists.

External analog and combined system

This mechanism is equipped with a majoritymulti-speed bicycles. It is used both on mountain, and on walking versions. The switch arrangement consists of a controller and sprockets of different diameters. The whole assembly forms a cassette system, the position of the speeds in which changes with the help of the rear and front regulator.

In a similar device can participate from three to 24-speed. The adjustment of such a device can be made independently, having previously studied the principle of operation and the arrangement of the mechanism.

The combined circuit is a mixexternal and internal mechanism. It is fixed on the rear bushing. This type is not very popular, because it combines all the shortcomings of the above modifications. The site is configured only by a specialist.

Shimano speed selector

In the modern market there are a lot of brands, oriented to bicycle accessories. One of the best switches are the Japanese models of Shimano and the American design from Sram.

Consider the modifications and characteristics of professional switches "Shimano":

1. Options XTR occupy leading positions on the combination of quality indicators and prices. Modifications are of low mass, they are used mainly on racing bikes.
2. Deore, Saint, Slx - are used on bicycles of various categories with 27 gears.
3. The Shimano LX speed switch, Dura-Ace, Hone occupy the third place in this line, they are aimed at the maximum speed cycling machines.
4. Tourney - aggregates with the 21st gear, designed for a quiet ride.

Sram

These models can be divided into two groups: for sports and amateur driving. The first category includes the following variations:

1. ESP 7.0 - switches are made of very durable components, designed to adjust 24-speed.
2. ESP 4.0 / 5.0 - have a lower cost thanprofessional analogs, can withstand up to 24 transmissions, are oriented to tourist models of bikes. In addition, Sram 4,0 can be equipped with cheap hybrid designs for mountain bikes.
3. ESP 3.0 - designed for walking and city devices.

The question arises, which speed switchesIs the bicycle better? There are no cardinal differences in the regulation and operation of different control lines. For example, eight-speed modifications of Alivio, Acera, Altus can be replaced by nine-speed analogues Deore, LX / XTR. The same can be done in the reverse order.

Adjustment

How to adjust the speed switch tobicycle? To begin, consider the correction of the rear node. This mechanism is used on most modern bikes. It consists of the following elements:

1. A frame whose length affects the number of gears.
2. Pairs of rollers responsible for stretching and direction of the chain.
3. Parallelogram mechanism.
4. Fasteners.
5. Limiters of top and bottom speed.
6. Adjustment screw.
7. A cable guide.

Assembling the speed switch on a bicycle forthe steering wheel, and also its adjustment, it may be necessary, when the speed does not change, the chain jumps through the asterisks, strange sounds or grinding sounds during the operation of the device.

The knot is adjusted as follows:

• Make sure that the speed regulator is installed vertically and parallel to the bicycle.
• The bike should be turned upside down, which provides access to the adjusting screws.
• The chain needs to be lowered to the smallest asterisk, using the turns of the steering wheel on the right side of the steering wheel.
• Unlock the switch by loosening the cable fixing screw.
• Using a screwdriver and adjusting screw H, it is necessary to adjust the chain so that the sprockets on which the chain lies lie on one line.
• The cable is tightened by hand as much as possible, then fixed with a screw.
• Next, the operation of the node is checked. If there are problems with transferring on large stars, you need to turn the handle counter-clockwise, pulling the cable.
• Then the chain is transferred to the smallest star with the help of a manket.
• By means of the screw L, the position is adjusted so that the largest sprocket is placed in the same plane as the controller foot.

Front end setup

Types of speed switches for bicycles on the handlebars are listed above. Next, we will analyze the adjustment of the front element. The assembly consists of the following parts:

• The frame through which the chain passes.
• The mechanism with a spring.
• Upper and lower limiter (H / L).
• Latch and cable.

The switch configuration consists of the following steps:

1. The chain should be set in front of the smallest star, and the rear - to the maximum analog.
2. Using a hexagon, release the cable fixing screw.
3. Using a screwdriver and a screw L, adjust the position of the frame so that the distance from the inside to the chain is 4 mm.
4. The rope is tightened and fastened with a screw.
5. The second asterisk is adjusted after transferring the chain on the rear switch to the smallest star.
6. Check if the chain is catching. If such a problem exists, it is necessary to tighten the cable more tightly, using a manet. The distance from the chain to the frame should be about 3 mm.
7. The third star is adjusted with screw H. If necessary, increase the clearance by pushing the frame outwards.

Troubleshoot problems

Repair of the bicycle speed switch on the steering wheel may be required in the following cases:

1. Tension of the cable.This problem can be diagnosed if, when driving, the chain moves without sound and hardly falls on the large asterisks. In addition, this failure is indicated by the reluctance of the chain to jump to small stars. The problem is eliminated by adjusting the drum on the scanner. The adjustment should be carried out until the chain begins to smoothly take the desired position.
2. Rope tear. To fix this problem, replace the part. To do this, you need to disassemble the mantle, dismantle the old element, install, fix and lubricate the new cable.
3. Seizure of the mechanism spring. Clean up and flush the part.
4. Breakage or deformation of the frame or screw. This problem often occurs after a stroke. It is best to replace faulty items.

How much does the speed switch on the bike cost? Depending on the company and destination, the site can be purchased at a price of 500 to 3500 rubles.

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