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SIGMA is perhaps the most popular manufacturer of bicycle computers, bicycle lights, and heart rate monitors in Lithuania. Operating in Germany since 1982, the company uses advanced technologies in its products, so they not only look great and stay compact, but are also highly functional. Today, Sigma offers a very wide range of models and accessories for them.
With the RECO 81 LINK you are optimally protected on every ride. The smart radar with integrated rear light detects vehicles approaching from behind and at the same time makes you visible from afar — day and night. A brake light and emergency brake light add an extra level of safety.
The RECO 81 LINK features a well thought-out dispersion axis: a dispersion of 2 × 30 degrees from the centre axis ensures vehicles are detected across a wide corridor behind you. The radar detects up to 8 objects at a distance of up to 140 metres. The light has a 220-degree viewing angle, so you stay visible all around for maximum safety day and night.
Technical specifications
- Dimensions: 98.6 × 19.7 × 39.5 mm
- Weight: 100 g (incl. bracket)
- Water resistance: IP67
- Connectivity: ANT+ BLE App
- Detection range: 140 m
- Number of threats: 8
- Run time light + radar: up to 15 h
- Run time radar only: up to 30 h
- Six modes: High (up to 15 h), Peloton (up to 26 h), Day Flash (up to 21 h), Night Flash (up to 23 h), ECO Flash (up to 27 h), Radar only (up to 30 h)
- Brake light
- Charge time: 3 h
- Tool-free mounting
- Switch-on protection: double click for ON
- Visibility range: 500 m
- Link function
- Emergency brake light
- Integrated charging: USB-C
- Battery indicator
- Mode memory function
- SIGMA RIDE app compatible: firmware updates, status information
- Radar detection range of 140 metres and object detection of up to 8 vehicles
- All bike computers with an ANT+ radar profile are compatible with RECO 81 Link. Connection via BLE with the SIGMA RIDE app for updates and status display
- Strong rear light with 500 m visibility and 6 light modes including Peloton mode
- LED brake light and emergency brake light function
- Pair the RECO 81 LINK radar with the AURA 100 and control both devices with a single button push
- Battery life in Radar Only mode up to 30 h
- SAFETY WITH VISION The radar of the RECO 81 LINK ensures approaching vehicles do not miss you: a bright warning light signals to motorists that they are approaching a cyclist. At the same time, if you use a bike computer compatible with RECO 81, you are warned yourself and can adjust your pace and position on the road accordingly.
- DIGITAL REARVIEW MIRROR Connect your RECO 81 LINK to your GPS bike computer via ANT+ and always keep an eye on the traffic behind you. The system detects up to eight approaching vehicles and shows them directly on your display. The RECO 81 LINK radar distinguishes between normally approaching objects and fast-approaching vehicles.
- VISUAL AND AUDIBLE ALARMS Connect your RECO 81 LINK to your SIGMA ROX 12.1 or 11.1 EVO GPS bike computer and receive visual and audible warnings as soon as vehicles approach from behind, so you can react immediately. From spring 2026, SIGMA RIDE app users will also benefit from the safety features of the RECO models, with the option in the RIDE app to be alerted acoustically and visually to approaching vehicles. Until then, the RECO 80 LINK and RECO 81 LINK can be connected to the RIDE app to display status and perform firmware updates.
- VISIBLE. SURE. SMART. The radar rear light has an integrated LED brake light function as well as an emergency brake light function that reacts in a fraction of a second, so following traffic notices you when it matters most.
- LINK. RIDE. CONNECT. Your RECO is compatible with the SIGMA AURA 100 Link front light. The connection creates an intelligent lighting combination in which you conveniently operate both devices via the front light and always keep an eye on the battery level. This lets you control your entire lighting setup at the touch of a button — simple, safe and smart.
- RECHARGEABLE The RECO 81 LINK is rechargeable via USB-C — very straightforward and environmentally friendly. In about 3 hours the battery is fully charged and ready for your next tour.
- SIX MODES. FULL FLEXIBILITY. The RECO 81 LINK has six light modes for every riding situation. In High Mode the rear light provides strong continuous illumination, while Radar Only Mode activates the light only when a vehicle is approaching — with a run time of up to 30 hours. In addition, Day Flash, Night Flash, Eco Flash and the innovative Peloton Mode are available. The latter is specially developed for group rides: it reduces the light intensity so as not to dazzle others, while the radar function stays active — for safety in the group and maximum consideration.
- VISIBLE FROM AFAR The light is highly visible from up to 500 metres away.
- PROTECTED IN ALL WEATHER CONDITIONS Whether riding in the rain or through splashing water, your RECO remains reliably ready for use. It is IP67 certified.
- FITS EVERY BIKE No matter what bike you ride, the RECO 81 LINK is easy and secure to attach thanks to its flexible mounting options. With the included rubber adapters it fits perfectly on D-shaped, aero or round seatposts. You then twist the radar into the holder using a twist lock, so your rear light sits stably and optimally aligned for maximum visibility on every ride.