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LightSKIN LED Seatpost 30,8 MM Black : Amazon.co.uk: Sports & Outdoors
Seatpost with taillight built in. Accessory blast from the past. Found while on craiglist. https://newyork.craigslist.org/que/bik/7565099330.html. Called LightSkin, sold around 8 years ago, Powered by 2xAA batteries. https://youtu.be/eIy8tK50S3Q Found ...
Light system for easy retrofitting: LightSkin's LED handlebar and seatpost tested — urbanbike.news
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