Addressing the differences between mountain and road frames, Tate Labs designed its Bar Fly SLi D mount to sit centered on your stem to make it ideal for everything from mountain bikes to 'cross setups, and it's versatile enough to fit either 31. 8mm or 35. 0mm handlebars. The SLi D is compatible with most Garmin, Magellan, Cateye, or Joule computers, and it has space to mount a light as well. With the use of Tate Labs' camera accessory, the mount can also fit a GoPro camera. Tate Labs claimed the composite used to make this mount has been tested to be 20 times stronger than aluminum, but in the event that you do find a way to break it, the company will send you a new one, no questions asked.