Serfas TBT-50R Thunderbolt 2.0 (50 Lumens) Bike Accessories_Chains Flash Modes: Daytime Flash (130

Flash Modes: Daytime Flash (130 Lumens): 19 hrs

R: FORK RAKE

laser-cut perforations in the shoulders for added breathability

This test is much more demanding than the current standard

Serfas TBT-50R Thunderbolt 2.0 (50 Lumens) Bike Accessories_Chains Flash Modes: Daytime Flash (130Features: Super Bright (50 Lumens) *Daytime Flash Auto Safe Mode Last Mode Memory USB Remote Switch Compatible Aero Post Compatible USB Rechargeable Specs: 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