Never forget this: There is a tool for everything. And not just a general mixed-use tool. There is a tool specifically designed for the job you’re doing. Take rulers, for example. They’re one of the ...

Ron George, a bicycle mechanic in Moab, Utah, sends along a tape that permits us to eavesdrop on his workplace. Southern Utah is home to a community of serious mountain bikers and road bikers.

In disc-brake systems, a caliper is a set of metal jaws that clamps down on a wheel’s brake disc, or rotor, when the driver applies the brakes. The caliper presses brake pads against either side of ...