SIGMA HIRO 50 – rear bicycle light with intelligent brake light function

Greater visibility. More safety. Day and night.

The SIGMA HIRO 50 is a modern LED rear bicycle light that combines a compact design with an intelligent brake light function. The integrated acceleration sensor automatically detects braking and increases the light intensity to warn people riding behind the cyclist. In the event of sudden braking, a pulsing warning signal is also activated.

Visibility of up to 500 metres, wide-angle side visibility and compliance with German StVZO lighting regulations make the HIRO 50 a practical solution for commuters, road and gravel cycling enthusiasts, and everyone who values good visibility on the road.

Key benefits

Intelligent brake light function – the acceleration sensor detects braking and automatically activates a brighter light.
Warning during sudden braking – the pulsing light signal helps attract the attention of other road users to a sudden reduction in speed.
Visibility up to 500 m – the clear light signal helps other road users see the cyclist from a long distance.
Good side visibility – the light’s design also helps make the cyclist visible from the side.
Up to 11 hours of runtime – the battery allows the light to be used for daily commutes and longer rides.
USB-C charging – convenient charging and a three-stage battery level indicator.
Quick tool-free mounting – the flexible silicone bracket makes it easy to attach the light to most standard seatposts.
IP44 splash resistance – the light is designed for use in changing weather conditions.
Compact and lightweight design – the weight including the bracket is only 30 g.
Intelligent brake light

Road safety also depends on how quickly other road users notice a cyclist’s change in speed. The SIGMA HIRO 50 uses an integrated acceleration sensor that detects braking and automatically activates the brake light function.

During braking, all three LEDs shine more brightly, increasing the visibility of the signal. When speed is reduced sharply, the light activates a pulsing warning light that helps signal a dangerous situation to people riding behind.

Long runtime and convenient charging

The integrated battery provides up to 11 hours of runtime in Eco mode. In High mode, the runtime is up to 4 hours. The three-stage indicator lets you quickly check the charge level, while the modern USB-C port makes it easy to recharge the battery.

A full charge takes approximately 3 hours, depending on the power source used.

Compact design and easy mounting

The slim housing of the HIRO 50 fits equally well on city and trekking bikes as on sporty road and gravel bikes. The flexible silicone bracket allows tool-free mounting, while double-clicking the button prevents the light from being switched on accidentally during transport.

Thanks to its IP44 protection rating, the light is also suitable for riding in the rain and in conditions with splashing water.

HIRO 50 LINK version – additional features

For those looking for extended functionality, the SIGMA HIRO 50 LINK version is also available. In addition to its basic lighting functions, it enables a wireless connection with compatible SIGMA LINK front lights.

Simultaneous switching on and off of compatible front and rear lights.
Displaying the rear light’s charge level on a compatible front light.
Connecting to the SIGMA RIDE app via Bluetooth.
Checking the battery level, assigning names to devices and installing software updates.
Choose the standard HIRO 50 version if you want a functional rear light with an intelligent brake light, or the HIRO 50 LINK if you want to use the additional connection options within the SIGMA LINK ecosystem.

The following accessories may be useful for adapting the mounting method and expanding the equipment:

SEATSTAY BRACKET – enables the rear light to be mounted on the rear triangle stays, for example when the seatpost is occupied by a bag.
Extended silicone bracket – designed for seatposts with an aerodynamic profile.
Rubber bracket for rear lights – a replacement part available from the manufacturer.
USB-C cable and USB charger – available as separate accessories.
Note: The manufacturer does not include a USB-C cable or power adapter as standard. The accessories must be purchased separately if they are not already available.

Why choose the SIGMA HIRO 50?

The SIGMA HIRO 50 is designed for cyclists who want to increase their visibility and signal braking more clearly without mounting large and heavy lighting. The automatic brake light function, emergency braking warning, USB-C charging and up to 11 hours of runtime create a practical combination for daily routes, training sessions and weekend trips.

Choose the SIGMA HIRO 50 and enjoy better visibility on every cycling journey.