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The world's lightest folding bike is here. The Hummingbird Bike Company has put its ultra-light, carbon fiber bike into production following a successful 2015 Kickstarter campaign.

The two-wheeler weighs only 15 pounds. According to the London startup, the bike features a unique folding mechanism where "the rear triangle pivots around the bottom bracket, so the chain tension never changes. Not only does this prevent the chain from falling off but it also removes the need for a chain tensioner."

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