A bicycle frame is the main component of a bicycle, onto which wheels and other components are fitted. The modern and most common frame design for an upright bicycle is based on the safety bicycle, and consists of two triangles: a main triangle and a paired rear triangle. This is known as the diamond frame. Frames are required to be strong, stiff and light, which they do by combining different materials and shapes.
The Cannondale Bicycle Corporation is an American division of Dutch conglomerate Pon Holdings that supplies bicycles. Its headquarters are in Wilton, Connecticut, with engineering offices in Freiburg, Germany. Frames are manufactured in Taiwan. Bikes are assembled in Taiwan, as well as in the USA and in The Netherlands for the local markets.
The Schwinn Bicycle Company is an American company that develops, manufactures and markets bicycles under the eponymous brand name. The company was originally founded by Ignaz Schwinn (1860–1948) in Chicago in 1895. It became the dominant manufacturer of American bicycles through most of the 20th century. After declaring bankruptcy in 1992, Schwinn has since been a sub-brand of Pacific Cycle, owned by the Dutch conglomerate, Pon Holdings.
Giant Manufacturing Co. Ltd. is a Taiwanese bicycle manufacturer, recognized as the world's largest bicycle designer and manufacturer. Giant has manufacturing facilities in Taiwan, the Netherlands, China, and Hungary.
Tom Ritchey is an American bicycle frame builder, Category 1 racer, fabricator, designer, and founder of Ritchey Design. Ritchey is a US pioneer in modern frame building and the first production mountain bike builder/manufacturer in the history of the sport. He is an innovator of bicycle components that have been used in winning some of the biggest cycling competitions in the world including the UCI World Championships, the Tour de France and the Olympics. In 1988, Ritchey was inducted into the inaugural Mountain Bike Hall of Fame in Crested Butte, Colorado : and 2012, inducted to the United States Bicycle Hall of Fame in Davis, California.
Keith Bontrager is a motorcycle racer who became a pioneer in the development of the modern mountain bike. Between 1980 and 1995, he was president of his own Bontrager Company, which continues to develop components for Trek Bicycle Corporation after Trek bought out Bontrager.
A cruiser bicycle, also known as a beach cruiser or (formerly) motobike, is a bicycle that usually combines balloon tires, an upright seating posture, a single-speed drivetrain, and straightforward steel construction with expressive styling. Cruisers are popular among casual bicyclists and vacationers because they are very stable and easy to ride, but their heavy weight and balloon tires tend to make them rather slow. Another common feature is their ability to be customized with accessories including fenders, lights and saddle bags. They are designed for use primarily on paved roads, low speeds/distances, and are included in the non-racing/non-touring class and heavyweight or middleweight styles of the road bicycle type.
GT Bicycles is an American company that designs and manufactures BMX, mountain, and road bicycles. GT is a division of the Dutch conglomerate Pon Holdings, which also markets Cannondale, Schwinn, Mongoose, IronHorse, DYNO, and RoadMaster bicycle brands; all manufactured in Asia.
Reynolds Technology is a manufacturer of tubing for bicycle frames and other bicycle components based in Birmingham, England established in 1898.
Lugged steel frame construction is a method of building bicycle frames using steel tubing mated with socket-like sleeves, called lugs. For most of the bicycle's history, steel has been the primary material for bicycle frames, with lugged construction the primary assembling method. Steel continues in use by builders of high-quality steel frames, though its dominance as a frame material has waned since the mid-1990s displaced largely by aluminum and carbon fiber; lugging has been displaced by TIG welding.
Kogswell Cycles, Inc. was a small bicycle frame company with its headquarters in El Dorado Hills, California. Kogswell frames were designed in the United States and manufactured in Taiwan. Kogswell frames often ran counter to mainstream bicycle industry trends. According to Biking.com, Kogswell "focuses on creating bicycle frames that lean more towards utilitarian design rather than speed and rough roading."
The Chicago Bicycle Company was a short-lived American bicycle company which operated from 1994 to 1998. It was headquartered in Burlington, Vermont, with its main production facilities in Chicago.
The Milwaukee Bicycle Co. is brand of bicycle and bicycle parts. It is the house brand of Ben's Cycle and Fitness, a family-owned bicycle shop in the Lincoln Village neighborhood of Milwaukee, Wisconsin.
Co-Motion Cycles is an American bicycle manufacturer located in Eugene, Oregon. The company was formed in 1988. It is owned by Dwan Shepard and Dan Vrijmoet. The company makes high-end tandem and single bicycles. Co-Motion offers both custom frames and ready-made frames in standard dimensions. The frames in the company's current line-up are TIG-welded steel or aluminum. Their bikes cater to cyclo-cross racing, touring, road racing, and off-road touring.
Bilenky Cycle Works is an American handmade bicycle manufacturer located in Philadelphia, Pennsylvania.
Stelbel is an Italian manufacturer of racing bicycles, founded in 1973 by Stelio Belletti.
Stelio Belletti is an Italian craftsman and entrepreneur and specialized in bicycle frame construction. He founded the brand Stelbel in 1973.
The Schwinn Paramount was a high-end racing bicycle produced under the Schwinn Bicycle Company brand from 1938 through 2009.
