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This is a car's world and every time you hop on your bike you're taking your life in your hands. That takes balls. Big, luminescent balls. Designed to increase your visibility while riding, this easily attached light will flop from side to side behind your bike seat, sending a clear message to aggressive cars and pedestrians that you're not afraid. In fact, maybe they should be afraid. Give it a little pinch and it'll flash in three different modes: solid, fast-strobe, and slow-strobe. Just, you know, depending on how hard you're feeling. Don't get pushed around on your bike, grab a Bike Sack and stand your ground.

Details & Requirements

  • Runs on 2 XCR2032 button batteries (included)
  • Solid, fast-strobe, and slow-strobe modes


  • Tail light (blue)


  • Ships Internationally
  • Expected Delivery: Feb 5 - Feb 8
  • Expected International Delivery: Feb 6 - Feb 11


  • Returns accepted within 15 days of shipment for orders within the Contiguous US.