Topeak Aero Wedge iGlow (QuickClick Mount)

Topeak's compact Aero Wedge iGlow is a brilliant combo package: it combines the convenience and storage of a seatbag with the safety and visibility of a taillight. The built-in, super-bright 0.5W LED has an optical fiber element that surrounds the bag in light. Plus, Topeak's QuickClick mount makes it simple to swap between bikes. Two CR2032 batteries included.