Serfas Thunderbolt 20



Great New Light from Serfas for 2018

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was $69.95


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  • To Order Please Call Us (02) 9630 3844

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.

Our fist look at the new Thunderbolt was impressive. Serfas have improved the Thunderbolt for the new year. Light power is still awesome but the new bracket system is great. Mounts to any shape seatpost with no fuss at all. 


  • 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

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