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 ...

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 ...

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 ...

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; ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. How we test gear. Thanks for writing, Peter. I have a fair amount to say on this subject, but I’ll ...

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 ...

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 ...

When To Replace It is a new feature series in which we explore when one should replace common cycling products like helmets, apparel and various moving parts on your bike. Curious about a particular ...