It's heavy and unwieldy, and that's a good thing. Read more about the study in this piece from Vox's Brad Plumer: http://www.vox.com/2016/4/3/11349856/bike-share-safety --- Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out http://www.vox.com/ to get up to speed on everything from Kurdistan to the Kim Kardashian app. Check out our full video catalog: http://goo.gl/IZONyE Follow Vox on Twitter: http://goo.gl/XFrZ5H Or on Facebook: http://goo.gl/U2g06o