For urban cyclists - from bike commuters to those who pedal to stay in shape - a few trusty apps can provide a smooth ride, by tracking your stats, offering quick repair advice, and providing the quickest routes. Here are a few to stash in your smartphone before you take off. Text by Relaxnews iMapMy: Just like MapMyRide for runners, cyclists have their own version, which can track distance, pace, duration, elevation, speed, and calories burned. It also provides bike maps and an online training log, and uploads your information to social networking sites. Available for Android, iPhone, and Blackberry. $2.99. (Apple)