Best rear bike lights for 2021

A rear bike light is an important item to ride safer in bicycle. In fact, a rear bike light is recommended during the day as well as the night. To ride safer in some weather conditions like fog, low light and rain. We are the most vulnerable group on the road and a rear bike light boost our visibility for drivers. Then, A led rear bike light is a small investment for road and MTB riders.

5 best rear bike lights for 2021

If you want to buy a rear light for your bike. You must take into account some details: battery life, charging mode (USB, batteries …), waterproof, support and lumens (light power).

However, the most important thing is how the light improves our visibility on the road. Sometimes, a rear bike light is more important than the colour of our clothes. Some lights increase our visibility by more than 200 meters. In the next image you can see the visibility according to our maillot colour at night.

LED technology is the most recommended type of lighting. Why these kinds of lights? Led lights are more durable, less consumption, cheaper and this kind of light does not get hot.

IPX category is very important too. Probably, you may have noticed ratings such as IPX4 and IPX7 and wondered what they mean. IPX stands, the degree of protection against what could harm the light, such as water. IPX ratings describe the degree of protection against liquids in various products.

IPX2, light can survive vertical drops of water falling on it.
IPX4, light can survive splashes of water from any direction.
IPX6, light can survive strong water jets.
IPX7/8, light can survive immersion in water deeper than 1m.

Next we are going to show you the best rear lights for cycling and MTB that improve your day and night visibility.

Bright cycling rear light - best price-quality


If you ride through busy roads you are getting good value. Probably, this is the most powerful low cost light, 110 lumens. This light increase your day and night visibility to ride safer. It has thousands of positive reviews in Amazon US, UK and CA. This is a cheap light sold worldwide.

  • Lab-tested output of 110 lumens
  • Battery Life: 4 to 10h lasting.
  • USB Rechargeable: 2 hours charging
  • Waterproof: IPX 4
  • Packing information: 1 x tail light, 2 x mount, 1 x cable and 1 x user manual.

Don PEREGRINO 110 Lumens Powerful LED Bike Rear Light

Is it Worth Your Money? garmin varia

Garmin Varia | Cycling Radar and Tail Light

  • Rearview radar with tail light provides awareness of vehicles approaching from behind up to 153 yards (140 meters) away.
  • Battery life: up to 16 hours in day flash mode
  • Pairs seamlessly with your Edge bike computer, smartphones and Garmin devices.
  • Daylight visibility up to 1 mile alerts motorists to your presence as soon as possible
  • Peloton mode provides a low-intensity light flash that is perfect for cycling in groups
Garmin Varia tail light radar view

Garmin Varia RTL515 Rearview Cycling Radar and Tail Light


A popular cycling brand of cycling computers, Cateye, has a light with an incredible average customer reviews in some countries like Canada, UK or USA.
Cateye Rapid Mini has 3 red LEDs with 25 Lumen outputs. A cheap quality-price light.

Cateye Rapid Mini

  • USB Rechargeable (Micro USB cable included)
  • 4 Light Modes
  • Battery life: flashing mode 30 hours lasting
cateye rapid mini tail bike lightjpg

Cateye Rapid Mini (25 Lumen) USB Rear Bike Light and Reflectors

Nine different lighting modes

Olight® RN120 Bicycle Tail Light

Olight RN 120 is a powerful bicycle tail light, the max output can be reached up to 120 lumens, breaking through design conception, brings you 260°visibility. The tail light comes with a micro-USB charging cable, easy to charge with any power source like your laptop or portable power bank.

  • Waterproof: IPX6
  • 9 different lighting modes: High Mode: 80 lumens – 90 min / Mid Mode: 45 lumens – 170min / Low Mode: 20 lumens – 310min / Auto Break / Flash / Breathe / Comet / Interactive / Smart Mode
  • Max battery life: 20 hours
olight satefy light motion sensor

Olight® RN120 Bicycle Tail Light

Most popular Trek Bike Light

Bontrager Flare RT Rear Bike Light

Make every ride safer with Bontrager Flare RT. Trek brand says; focus and range enable it to be seen from 2 km away during daytime hours. The flash pattern produces up to 90 lumens and this light has a sensor auto-adjusts brightness to your environment.

  • Flash modes: 90LM-6hrs,
  • 45LM-12hrs, 5LM-15hrs. Steady modes: 25LM-4.5hrs, 5LM-13.5hrs.
  • Includes rear Quick Connect bracket and Mini USB charging cable.IPX7 waterproof rating.
Bontrager Rear Bike Light

Bontrager Flare RT