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Serfas Thunder Blast Rear Bike Light

sku# 172855
Serfas - Thunder Blast Rear Bike LightSerfas - Thunder Blast Rear Bike Light
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Product Info

The Serfas Thunder Blast Rear Bike Light is a motivated illumination companion. It's got your back with 40 lumens of rear-facing microLED power, keeping you safe with solid or flashing modes. And when it senses its power is running out, it blasts out a loud beep to let you know.

Product Details


40 Lumen Red MicroLEDs


USB Rechargable Li-Polymer


Flash ModesHigh (40 Lumens): 4 hrs / Low (10 Lumens): 15.25 hrs

Solid ModesHigh (40 Lumens): 2.25 hrs / Low (10 Lumens): 7.75 hrs


Aero Post Compatible

Additional Features

"Blast" Audible Warning System (AWS)When the battery reaches 10 minutes of runtime, in its current mode, the light will emit a long beep followed immediately by a short beep. Sound will continue every minute.

Charge Indicator Light

Extra Long Mounting Straps


  • Biking Type: Urban/Commuter
  • Light Output (lm): 40
  • Weight (g): 48
  • Rechargeable: Yes
  • Warranty: Limited Lifetime (1 Year on Batteries)



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