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

Greater visibility. More safety. Day and night.

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 situations involving sudden braking, a pulsing warning signal is also activated.

Visibility of up to 500 metres, wide side visibility and compliance with German StVZO lighting regulations make the HIRO 50 a practical solution for commuters, road and gravel cycling enthusiasts, and anyone 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 draw the attention of other road users to a sudden reduction in speed.
Visibility of up to 500 m – the clear light signal helps other road users spot the cyclist from a considerable distance.
Good side visibility – the light’s design helps make the cyclist visible from the side as well.
Up to 11 hours of operation – the battery allows the light to be used during daily commutes and longer trips.
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 just 30 g.
Intelligent brake light

Road safety also depends on how quickly other road users notice a cyclist’s change in speed. 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 signal that helps alert people riding behind the cyclist to a dangerous situation.

Long operating time and convenient charging

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

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

Compact design and simple mounting

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

Thanks to its IP44 rating, the light is also suitable for riding in the rain and in wet conditions.

HIRO 50 LINK version – additional possibilities

For those looking for extended functionality, the SIGMA HIRO 50 LINK version is also available. In addition to the basic lighting functions, it enables a wireless connection to 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.
Connection 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 HIRO 50 LINK if you want to use additional connectivity options within the SIGMA LINK ecosystem.

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

SEATSTAY BRACKET – allows the rear light to be mounted on the seatstays of the rear triangle, 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 component 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 supply as standard. The accessories must be purchased separately if they are not already available.

Why choose SIGMA HIRO 50?

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

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