![]() What is an electronic drivetrain on a bike? Because the belt is a continuous loop, the frame requires removable dropouts or a chainstay splitter that lets you thread the belt into the rear triangle. However, only certain frames are compatible with a belt drive. This requires even less maintenance than a chain because there are no links to lube, meaning they are also much cleaner than an oily chain. ASDesign.uk.comīoth gearboxes and hub gears can also be used with belt drives. Do bikes have a gearbox? What is a gearbox bike?Ī Gates Carbon Drive belt requires less maintenance than a traditional chain. You’re riding around with a small gearbox inside your hub and that in turn contains a lot of metal parts that add substantial heft.Ĭhanging a puncture can also be harder with a hub gear. With systems ranging from three to 14 gears, there’s a wide range of options for whatever terrain you find yourself on. There are lots of hub gear options available, but the most common are from Shimano, SRAM, Sturmey Archer and well-known manufacturer Rohloff. Having everything nicely packaged away inside your rear wheel lets you breathe that little bit easier, especially during winter, when keeping gears protected from the elements doesn’t hurt. There’s also no doubt that derailleurs are relatively exposed and susceptible to damage. With service intervals ranging between 3,000 to 5,000km, internal hub gears are great for the less maintenance-inclined. Hub gears are a popular option for commuters and those who want a robust and relatively maintenance-free drivetrain. What is a hub gear on a bike?Ī Shimano Alfine 11-speed hub with Gates Carbon Drive belt. That gives you a huge range of gears to choose from. You will usually find between one and three chainrings (single, double or triple chainset) and up to 11 sprockets (12 exist too in the form of SRAM Eagle and Campagnolo Record, and even 13 with Rotor) on the back wheel. The cassette allows you to select your gear more precisely within that range as you modulate your effort. The gears at the front provide large jumps, which effectively change the range of your gears, so that they are more suited to high speed, flat terrain or low-speed climbing. The bike may also have a front derailleur, which shifts the chain between chainrings attached to the cranks. As the derailleur moves to change gear it forces the chain against ramps or steps, moving it onto a bigger or smaller sprocket. This shifts the chain up or down the cassette. ![]() Gears are changed on the cassette (a set of sprockets on the rear wheel) by the rear derailleur. ![]() ![]() The majority of bikes on the market today have external drivetrains, which have been refined into simple, lightweight and efficient systems. An external drivetrain with a front and rear derailleur. ![]()
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