Put a Motor on Your Citi Bike

Public bicycle systems have changed the way many urban dwellers get around cities. Already established in ten American cities, they help unclog the subways, get people to exercise, and do their small part for the environment. But great as they are, they have two side effects: they make you sweaty and tired, especially if you have to get somewhere quickly. To alleviate the problem, the ShareRoller was created, which can turn any bike — Citi or otherwise — into an ebike in just 10 seconds.

At just over six pounds and the size of a ream of paper, the ShareRoller is light and portable enough to carry with you. Power-wise, it's no slouch. It packs a full horsepower (that's 750 watts for the bike folks) —  more power than a pro cyclist time trial — and uses friction to turn the front wheel, getting you going 18 mph with a 12 to 20 mile range. This could be a game changer.

Ethan Wolff-Mann is the Gear editor of Supercomrpessor. He thinks this idea is super cool, but is far too prideful to ever use something like this. Follow him on Twitter @ewolffmann.