Cycling - Always in the right gear with the rear derailleur
The bicycle circuit allows you to biking an enormously wide range of applications. With the ideal gear, you're on the move confidently in every terrain, in the level as well as uphill or downhill. Apart from singlespeed-bike makes a gear change on each MTB sense. The circuit on the bicycle can be realized as a derailleur or by means of a gear hub. The derailleur consists for the most part of the main components shifter, front derailleur , rear derailleur and sprocket . With a hub gear except for the handle these components, but depending on the type of bike may need a chain tensioner . Regardless of which type of bicycle gear you choose, it is important to pay close attention to a good chain and high-quality gear shifts.
The rear derailleur - Precise shifting is not left to chance
An essential part of a bicycle circuit, if no gear hub is installed, the rear derailleur. Precise gear changes not only provide fun, but also contribute significantly to an efficient drive. Spare yourself the hassle of inaccurate shifts and rattling chains that hurt your ears and unnecessarily cost your nerves! High-quality derailleurs guarantee you perfect gear changes in all driving situations. Uphill and downhill, the aisles must sit right away! Remember, only those who switch fast are also fast on the way!
Rear derailleurs in all gradations
With an already existing circuit you naturally have to pay attention to the compatibility. Therefore, we have in our shop derailleurs in different versions from 6/7/8 times to 11 times. Due to the different cage lengths available with us you can select the rear derailleur for your bike according to your requirements perfectly. In addition to the conventional control via a shift cable, the electronic circuit is becoming more and more established on mountain bikes as well. The switching processes are designed with the electronic circuit particularly effortless and precise.
Depending on the application, we offer a variety of first-class circuits in our online shop. With us you will find reliable rear derailleurs for the trekking bike as well as robust rear derailleurs for MTB hardcore use. Suitable for every rear derailleur, we offer low gearshift levers, derailleurs and chains in the shop!
What types of circuits are there?
Over the years, two types of circuit have become established on the market, although there are still other concepts. In the following section you want to show you the different possibilities:
The derailleur is certainly the most popular circuit type and present on all bicycle classes. Whether city bike, road bike or mountain bike, everywhere this circuit is installed and has depending on the version on different functions and features. At that time, a circuit was considered high quality, if they had a variety of courses. This is long gone and it does not automatically mean that the circuit with the most gears is best.
In chain shifting, the chain always runs over two pinions. One is attached to the rear hub, the other to the crank. Depending on the size of these two sprockets or chainrings your derailleur gets a certain gear ratio, which of course you can vary with a gear change. The sprocket on the rear hub usually has between 7 and 11 pinions. On the crank usually 2 to 3 chainrings are installed on normal mountain bikes. Here are also two levers on the handlebars are used, with which you can change the gears of your chainrings and pinions via appropriate shift cables. Here you get a high degree of flexibility, because your translation can be perfectly adapted to the circumstances of the track. A disadvantage is that the chain tension is relatively low and on bumpy trails the chain can fall off faster. The assembly of a chain guide is here but much more complicated than on a mountain bike with only one chainring front.
In modern enduro and all mountain bikes, more and more often only a front chainring is used. In such a mountain bike manufacturers then put on a sprocket set with 11 sprockets, so that even on the handlebar, only one lever is necessary. In addition, the chain and teeth of the pinion are meticulously matched to each other in such drives and hold each other firmly. Combined with a very high voltage of the rear derailleur can be dispensed with a chain guide in coarse Enduro and All Mountain use. Due to a good gear ratio, you still get enough opportunities as a driver to be able to accelerate from the fierce uphill to the crunchy downhill. A big advantage of this bike circuit is that it is very easy to handle and you can not interconnect, for example. In addition, the wear is minimized by the good coordination of the chain and the teeth of the sprockets. Such drives are available, for example, from Sram and Shimano.
With downhill bikes, the front chainring is always combined with a chain guide, so that the chain can not jump under any circumstances. At the rear hub then often only 7 pinions are used because with such a bike must not be driven uphill.
In general, a derailleur is a bit more sensitive and maintenance intensive than, for example, a hub gear, but the derailleur is clearly the measure of things when you are looking for a new circuit for your mountain bike.
The hub gear is used primarily in city and touring bikes. For this circuit, a kind of transmission is installed in the rear wheel or its hub. Normally, between three and eight courses are available. In special cases (eg with a Rohloff hub gearbox), up to twelve gears may also occur. Hub gears are available with and without withdrawal. Mostly they are controlled by a twist grip switch on the handlebars. The chain of a hub gear moves only over two sprockets or pinions, one in front and one in the back. There is no way that the chain can jump off and also the installation of a chain box is easy to implement. This not only protects the chain from dirt, but also protects it from oil spills.
A somewhat more exotic type of circuit is the gearshift. Here in the bottom bracket area of the bike, a gearbox is installed as in the car, which is located in an oil bath. This is extremely low maintenance, effective and noiseless. This type of circuit is usually used in mountain bikes, but is even here rather rare. A well-known manufacturer of these systems is called "Pinion" and is considered a pioneer in this segment.
Which type of circuit is suitable for which application?
Not every bicycle circuit is suitable for every purpose, so you should pay close attention to what you have in the circuit selection of your bikes. For a mountain bike, the derailleur is usually the right choice. On normal mountain bikes make a circuit with 2 to 3 chainrings in the front and 7 to 10 behind sense. If you want to ride enduro or all mountain bikes, you can also think about a 1 x 11 drive. A classic hub gear makes no sense at this point, unless you opt for a special hub gear as the home of Rohloff. This is specially designed for gravity use and thus much more robust than a normal 8-speed hub gear. The last alternative for mountain bikes is a transmission, for example from Pinion. However, these drives are not retrofittable and must be already enteintered into a bike from home. In addition, they are very expensive.
A hub gear in the classic sense is ideal for city or trekking bikes, with which you do not drive any huge climbs. However, they are ideal for driving in the city or in the countryside. They are very low maintenance and reliable, but do not offer such an enormous translation bandwidth, so that it can be exhausting on long and steep climbs. Even for unsafe drivers, the hub gear can make sense, because in a variant with resignation so three different brakes on the bike are possible.
Are there alternatives to the mechanical circuit?
Electrical circuit units are the alternative to mechanical systems and currently on the rise. Of the two big top dogs Sram and Shimano, there are different concepts, some even without cable get along. For this type of gear shift, many bicycle manufacturers already offer frames in which appropriate batteries or cables can be hidden inside. This not only looks great, but also minimizes the possibilities of a defect. The big advantage of an electric circuit system is the nearly powerless gear change as well as extremely precise gear shifts, which can be adjusted by computer. In addition, it can be decided in a two- or triple drive, which shift lever should be responsible for the front or rear handlebar.
Depending on the application, we offer a variety of first-class circuits in our online shop. With us you will find reliable rear derailleurs for the trekking bike as well as robust rear derailleurs for MTB hardcore use. Suitable for every rear derailleur, we offer low gearshift levers, derailleurs and chains in the shop. From 99 euros we also ship free shipping.