The bike wheel from startup Superpedestrian helps accelerate a cyclist going uphill, charging its battery with energy stored while braking and descending.
The technology also includes a mobile app that lets people adjust settings and monitor fitness statistics such as elevation gained and calories burned. The wheel also can automatically lock itself when its owner leaves and unlock when its owner returns, the company said.
Adding a 12-pound weight may sound like a lot of extra burden for a cyclist. But its battery is enough for a 20mph speed and 30-mile range, the company said.
In October, Superpedestrian announced it had raised $2.1 million in first-round funding from Spark Capital and David Karp, the founder of Tumblr.
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