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Electronic gearshift on bicycles

Elektronische Schaltungen ersetzen Schaltzüge durch Servomotoren und Funksignale. Shimano Di2, SRAM eTap AXS und Campagnolo EPS sind die drei großen Systeme – mit unterschiedlichen Ansätzen bei Kabelführung, Akkulaufzeit und Zusatzfunktionen.

An electronic shifting system refers to a type of gearshift used in bicycles that allows electronic control of gear shifting.

What is an electronic gear system on a bicycle?

An electronic bicycle gearshift, also known as an e-gearshift, is a gearshift that is controlled electronically rather than mechanically. It consists of an electronic derailleur, a shift lever and a control unit that controls the gear shifting. These gearshifts allow the rider to change gears more quickly and precisely and often also offer the option of automatically adjusting the gear shifting to the speed and inclination angle of the bike.

How does electronic gear shifting work on a bicycle?

Electronic bicycle shifting works by receiving signals from shifters or other controls and passing those signals on to the electronic derailleur. The derailleur then responds to those signals by moving the chain from one sprocket to the next. Shifting is controlled by electronic control rather than mechanical levers or cables.

What should you pay attention to in an electronic circuit?

When choosing an electronic gear system for a bicycle, the following aspects should be considered:

  1. Compatibility: It is important to ensure that the electronic shifting is compatible with the rest of the bike, especially the frame and fork.
  2. Control: Check whether the control of the gearshift is intuitive and easy to use for you and whether it meets the requirements of your driving style.
  3. Battery: Check how long the battery lasts and how easy it is to replace.
  4. Maintenance: Find out how often the electronic circuit needs to be serviced and what type of maintenance is required.
  5. Price: Electronic circuits are usually more expensive than mechanical circuits, make sure the price is appropriate within your budget and the benefits you receive.

It is also important to follow the manufacturer's instructions carefully to ensure that the gear system is installed and maintained correctly. Overall, electronic gearing for bicycles can offer some advantages, such as more precise gear shifting and the ability to automatically adjust gear shifting based on the speed and lean angle of the bike.

You should consider compatibility, control, battery life, maintenance requirements and price before choosing an electronic circuit.

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Published: January 31, 2023  |  Updated: May 21, 2026

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Häufige Fragen about Electronic gearshift on bicycles

Die häufigsten Fragen und Antworten

In practice, yes—provided the battery is charged. There's no cable stretch, no derailleur distortion due to worn cables, and no mis-shifting due to cable tension. However, the system requires regular battery charging; if you forget, you won't be able to shift gears at all. Modern systems provide timely warnings via a flashing signal on the lever.

Basic settings—such as the derailleur's limit screws—can be adjusted via the app without tools. Initial setup and calibration should be performed by an experienced mechanic, as the derailleur position and B-screw must be precisely adjusted. Subsequent adjustments can then be easily made via the app.

With Shimano Di2 (central battery), approximately 1,000–2,000 km, depending on shifting frequency. With SRAM eTap AXS (individual batteries), approximately 60 hours of active riding time per battery, which corresponds to roughly 3,000–4,000 km with average riding distances. Both systems provide timely warnings before the battery capacity becomes critically low.

All current systems are designed and sealed for normal outdoor use in rain and dirt. However, they are not suitable for continuous submersion. After riding in the rain, the bike should be dried; connectors (Di2/EPS) should be checked regularly.

Yes. Shimano offers a range specifically for e-bikes. Auto-shift function The EP801 and EP8000 motors coordinate with the Di2 derailleur and trigger automatic gear changes — adjusted to cadence and motor assistance. The result is a fully automatic riding experience without manual shifting.