TBT-50R Thunderbolt 2.0 (50 Lumens)


Available in stock
SKU: TBT-50R / 713835033609

Quick Overview

The Serfas True Series light line was developed to be the best on the market. Given the True stamp of approval, these tail lights will meet & exceed their expected lumen output while offering you all the features you’ve come to enjoy from Serfas lighting. Please welcome the new line of True Series lights & be prepared to turn night into day.

568 in stock (can be backordered)




  • Super Bright (50 Lumens) *Daytime Flash
  • Auto Safe Mode
  • Last Mode Memory
  • USB Remote Switch Compatible
  • Aero Post Compatible
  • USB Rechargeable
  • Solid Modes: High (25 Lumens): 1.5 hrs, Medium (15 Lumens): 2.25 hrs, Low (10 Lumens): 5.5 hrs
  • Flash Modes: *Daytime Flash (50 Lumens): 19.5 hrs, High Flash Slow (25 Lumens): 9.5 hrs, High Flash Fast (25 Lumens): 5 hrs, Low Flash (10 Lumens): 13 hrs, Auto Safe Mode Extends Runtime an Additional 45 mins
  • Weight: 40 Grams with Bracket
  • Battery: 500 mAh Lithium Polymer

Thunderbolt 2.0 Instructions

2 reviews for TBT-50R Thunderbolt 2.0 (50 Lumens)

  1. Suzanne

    With so many bike accidents recently, I have started riding with this tail light 100% of the time! Feeling far more safe with it on. Light weight, holds sturdy to my seat post and I like that I can mount it vertically or horizontally. Thanks Serfas!

  2. Keith D.

    Very simple, light and fast to mount/unmount. Bright enough to hurt your eyes on high. Pretty much a perfect light with loads of mounting options. Love it.

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