Have you ever seen a flag being raised, or wondered how a mechanical clock works? Let’s take a look at some of the simple mechanisms that they use. Pulleys and gears. When a flag is raised, it will ...

Pro road racers who use Berner's uniquely oversized rear derailleur cages have sworn time and again that they reduce drivetrain friction thanks to their humongous 15-tooth pulleys. Now, Jason Smith of ...

We’ve seen this one time and time again: water pump pulley ratio, meaning crank pulley and water pump pulley sizing. The ratio in size between the pulleys on the crankshaft and water pump must be what ...