Like the Portuguese explorer from which its manufacturer takes its name, the Magellan Cyclo 315 GPS Cycling Computer looks to the stars to plot its course. Unlike the original Magellan, the Cyclo 315 isn't exploring uncharted territory and, when it's looking to the stars, it does so to communicate via SiRFstarIII GPS with the satellites. While this may lack some of the romance of navigating by the stars, a sextet, and a stack of hand drawn charts, the additional benefits of GPS more than outweigh the loss of glamor. As far as space age exploration is concerned, the Cyclo 315 features all the same navigational genius of the more expensive 505 with two exceptions: no Bluetooth or smartphone connectivity. Detractors may complain that this means they won't get text, e mail, and phone call updates on their head unit to which we say: this is a cycling accessory. Quit worrying about the phone and ride. It does feature ANT connectivity, though, so it displays info from any ANT power meter, speedcadence sensor, and heart rate monitor. It'll also pull info from a Di2 setup running with Shimano's D Fly wireless system. Like the 505, the Cyclo 315's pre loaded maps include cycling specific notations restaurants, bike shops, and generous shoulders and dedicated lanes are all called out, keeping you informed of possible coffee stops and pleasant alternatives to gravelly, debris strewn shoulders on sketchy highways. By creating a rider profile, you can also ensure that you don't find yourself traversing punishing grades on a rest day or hitting dirt or gravel roads on your carbon rims and supple race tires. For off road riding, it will also ensure that you spend the maximum amount of your ride navigating lines through rock gutters and root lattices instead of traffic furniture. If you'd rather introduce an element of Magellan esque adventure to your ride, the Cyclo 315 also shares the 505's Surprise Me feature. Surprise Me automatically generates three prospective rout...