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BICYCLE DERAILLEUR

BICYCLE DERAILLEUR

Bicycle chain shifter, also known as transmission or speed shifter, is mainly divided into front chain shifter and rear chain shifter.

Front stringer (front stringer) : The main function of the front stringer is to move the chain between the sprockets on the crank set, that is, the chain is derailed from one link and pushed onto the other link. Since some bikes, such as 1X configured bikes, only have a single sprocket, there is no need for a front chain pick. Bikes with 2X or 3X configurations usually use a front pick.

Rear pull chain (rear pull) : The rear pull chain is an important part of the bicycle transmission system, responsible for the transformation of the chain on different flywheel pieces to cope with different road conditions, so that the rider can more rationally use the body to drive the bike forward. The rear chain lifter includes a chain lifter cage with pulleys (called guide wheels in some places) that are surrounded by the chain, and these pulleys include the upper (guide wheel) and the lower (tension wheel).

According to the arm length can be divided into short leg (SS), middle leg (GS) and long leg (SGS) three types. These classifications are based mainly on the length of the two plates on which the guide wheel and tension wheel are installed at the back, and the chain is passed through the middle. Different types of rear chain lifters are suitable for different bikes and riding needs. For example, the SS short leg back pick is usually used for two-piece dental trays, while the GS medium leg and SGS long leg back pick are more commonly used for three-piece dental trays or cross-country competitions.

In addition, depending on the type of shift handle, the chain shifter can also be used with split or jointed fingers. The split dial means that the speed dial is separated from the brake handle, while the connected dial is connected to the speed dial and the handle.

In general, the classification of bicycle chain lifters is mainly based on their installation position (front or back), arm length (SS, GS, SGS), and the way they fit with the variable speed handle (split or connected fingering). When choosing a chain puller, you need to choose the right type according to your riding needs and bicycle configuration.

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