The term "groupset" refers to the mechanical components of a racing bike, which exclude the frame, fork, wheelset, bars, stem, pedals, saddle and seatpost. Derailleur gears are an essential part of any groupset. These gears consist of a chain, multiple sprockets (wheels with teeth), and a mechanism that shifts the chain from one sprocket to another. This system is what allows the racing cyclist to adjust his or her speed and effort according to the terrain. The shifting mechanism can be located on the bike's stem, handlebars or frame, but total integration systems utilize combine brake and shift levers that allow the cyclist to shift gears without moving his or her hand. Derailleurs were developed in the late 19th century and aside from the introduction of total integration, they have changed little since that time.

There are a number of different manufacturers who produce complete bicycle groupsets, including Shimano, Campagnolo and Mavic, although the first two are probably the most well known. The various companies have different design philosophies, and cyclists are often loyal to one brand over all others. As with the non-groupset components, the mechanical elements of a racing bicycle should weigh as little as possible. As a result, carbon fiber has become popular in the manufacture of such elements. They are used for shifters, brake levers, cranks and parts of derailleurs.

cycling wheels

MTB wheels

bike wheels online