If you set up the suspension on your mountain bike based only on a friend’s recommendation, or you simply neglect it, your settings are less than ideal. You should check out the Shockwiz. You attach it to your shock or fork’s air inflation valve. After you calibrate the device, it collects data based on changes in air pressure. That information then gets transmitted to an app on your phone, which can then make recommendations based on your style of riding. You’ll be able to dial in the baseline pressure, air-spring ramp, high- and low-speed compression, rebound and bottom-out resistance.