The rear derailleur is one of the most fragile components on a mountain bike, subject to getting bent or jammed up with trail debris. That's where the Supre Drive drivetrain comes in, as it moves the ...

Today's bike parts are almost universally better than bike parts of 20, 30 years ago, but for each bit they function better, they look worse. Most bike riders live with it. Some work out little hacks ...

There have been countless innovations to the rear derailleur over the years. These have included compatibility with an ever-increasing number of sprockets, the introduction of indexed shifting, STI ...

Mountain bikers take their sport seriously, and put their bikes through all manner of punishment in the course of a ride. This has given rise to a wide range of specialist equipment, such as ...

In May, I went for a ride on the Mount Tam trails in Marin County, California, with Grant Petersen, the founder and owner of Rivendell Bicycle Works, and his buddy Dan Leto. It was a warm and sunny ...

Versions for road bikes (complete with front derailleurs) are reportedly in the works. The system consists of two components: a rear-derailleur-mounted motorized shifting module and a ...