[Scott Swaaley] needed a bunch of timing pulleys for the clock he was building. He had already decided on the MXL profile, but he needed so many of these toothed pulleys in so many configurations (hex ...

A functioning rear mech is essential for crisp shifting but how often do you check the wear on its component parts?

Whether your goal is looks, efficiency, or merely getting your engine running, pulleys are critical parts, and there are important factors that need to be considered when selecting them. If you're ...

One common misconception is that belts will slip more frequently on composite pulleys than on metal pulleys. Not so! The wedging action of V-belts is so efficient that slip should never be an issue; ...

As the evolution of the automobile continues, many hot rodders fear they will soon be locked out of the engine bay of Detroit's latest iron. While it's true that OBD-II electronics seem to have ...

If you've ever popped the hood of a running car, you probably noticed all the activity going on. Up top, you may hear the rhythmic ticking of the fuel injectors, then, if the engine was just fired up ...

A pulley is a simple machine using a wheel and a cord that's designed for lifting. A pulley is a simple machine using a wheel and a cord that's designed for lifting. Pulleys help make work easier by ...

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 ...

How do you know when to replace stuff you wear when riding, or on your bike? Tyres have wear indicators, and disc brake pads can be measured with a calliper. It’s never a bad idea to measure your ...