A taillight with brake light function increases safety, but the sensor, mounting, and selection must be checked. For the taillight with brake light function on the folding bike, the criteria are: sensor type, mounting position, and StVZO admissibility. The brake light function warns following traffic when you brake.
How Brake Light Sensors Work
Accelerometer sensors detect deceleration; brake lever sensors detect when the brake is applied. For the sensor of the brake light, accelerometers are more common because they require no wiring to the brake.
Mounting on the Folding Bike
The taillight should be mounted where it is visible and protected. For the mounting of the brake light, the seatpost or rear rack is suitable. Check the folding clearance.
Selection Criteria
| Criterion | What to check |
|---|---|
| Sensor type | Accelerometer or brake lever sensor |
| StVZO approval | Approval mark required |
| Battery life | USB rechargeable, sufficient for the commute |
| Mounting | Seatpost or rack, folding-compatible |
| Visibility | Visible from behind, not blocked by luggage |
Legal Requirements
In Germany, bicycle lights require StVZO approval. For the StVZO approval of the brake light, check the approval mark before purchasing.
Frequently Asked Questions
Are brake lights for bicycles allowed in Germany?
Only with StVZO approval. Check the approval mark before purchasing.
How does a brake light sensor work?
Accelerometers detect deceleration; brake lever sensors detect brake application. Both trigger the light.
Can I mount a brake light on a folding bike?
Yes, on the seatpost or rear rack. Check the folding clearance and the StVZO approval.
Does a brake light replace the taillight?
No. A functioning taillight is required by law. A brake light is additional.
