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Pocket Bicycles was the name of a manufacturer of portable bicycles located in Cambridge, Massachusetts in the 1970s.
| | This article needs additional citations for verification .(November 2017) (Learn how and when to remove this template message) |
Pocket Bicycles was the name of a manufacturer of portable bicycles located in Cambridge, Massachusetts in the 1970s.
While resembling many of the small-wheel folding bicycle designs of the time, the bicycle was distinctive in reducing the flexion of the down tube and hinge by use of cables kept under tension by the weight of the rider, saving weight and space compared to use of rigid tubing braces. Use of cables provided reduction of excessive vertical flex in the frame while still allowing easy adjustment of the degree of flexion retained, to act as a tunable suspension system absorbing much of the bumpiness of the ride normally associated with small wheel bicycles. [1]
A bicycle, also called a bike or cycle, is a human-powered or motor-powered, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist.
A mountain bike (MTB) or mountain bicycle is a bicycle designed for off-road cycling. Mountain bikes share some similarities with other bicycles, but incorporate features designed to enhance durability and performance in rough terrain. These typically include a suspension fork, large knobby tires, more durable wheels, more powerful brakes, straight handlebars, lower gear-ratios for climbing steep grades and sometimes rear suspension to really smooth out the trail.
A bicycle brake reduces the speed of a bicycle or prevents it from moving. The three main types are: rim brakes, disc brakes, and drum brakes.
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.
Derailleur gears are a variable-ratio transmission system commonly used on bicycles, consisting of a chain, multiple sprockets of different sizes, and a mechanism to move the chain from one sprocket to another. Although referred to as gears in the bike world, these bicycle gears are technically sprockets since they drive or are driven by a chain, and are not driven by one another.
A Bowden cable is a type of flexible cable used to transmit mechanical force or energy by the movement of an inner cable relative to a hollow outer cable housing. The housing is generally of composite construction, consisting of an inner lining, a longitudinally incompressible layer such as a helical winding or a sheaf of steel wire, and a protective outer covering.
A touring bicycle is a bicycle designed or modified to handle bicycle touring. To make the bikes sufficiently robust, comfortable and capable of carrying heavy loads, special features may include a long wheelbase, frame materials that favor flexibility over rigidity, heavy duty wheels, and multiple mounting points.
A utility bicycle,city bicycle, urban bicycle, European City Bike (ECB), classic bike or simply city-bike, is a bicycle designed for frequent short, moderately paced rides through relatively flat urban areas. It is a form of utility bicycle commonly seen around the world, built to facilitate everyday riding in normal clothes in a variety of weather conditions. It is therefore a bicycle designed for practical transportation, as opposed to those primarily for recreation and competition, such as touring bicycles, racing bicycles, and mountain bicycles. Utility bicycles are the most common form globally, and comprise the vast majority found in the developing world. City bikes may be individually owned or operated as part of a public bike sharing scheme.
A cyclo-cross bike or cyclo-cross bicycle is a bicycle specifically designed for the rigors of a cyclo-cross race. Cyclo-cross bicycles roughly resemble the racing bicycles used in road racing. The major differences between the two are the frame geometry, and the wider clearances that cyclo-cross bikes have for their larger tires and mud and other debris that they accumulate.
A bicycle fork is the part of a bicycle that holds the front wheel.
A safety bicycle is a type of bicycle that became very popular beginning in the late 1880s as an alternative to the penny-farthing ("ordinary") and is now the most common type of bicycle. Early bicycles of this style were known as safety bicycles because they were noted for, and marketed as, being safer than the high wheelers they were replacing. Even though modern bicycles use a similar design, the term is rarely used today and is considered obsolete outside circles familiar with high wheelers.
A bicycle lock is a security device used to deter bicycle theft, either by simply locking one of the wheels or by fastening the bicycle to a fixed object, e.g., a bike rack.
Brompton Bicycle is a British manufacturer of folding bicycles based in Greenford, London.
A bicycle trailer is a motorless wheeled frame with a hitch system for transporting cargo by bicycle. It can greatly increase a bike's cargo capacity, allowing point-to-point haulage of objects up to 4 cubic yards in volume that weigh as much as half a ton.
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."
Bicycle suspension is the system, or systems, used to suspend the rider and bicycle in order to insulate them from the roughness of the terrain. Bicycle suspension is used primarily on mountain bikes, but is also common on hybrid bicycles.
The tikit is a 16-inch wheel folding bicycle with an unusually fast folding mechanism that can be folded/unfolded in less than five seconds. The tikit was manufactured in the United States by Bike Friday from 2007 to 2016
A folding bicycle is a bicycle designed to fold into a compact form, facilitating transport and storage. When folded, the bikes can be more easily carried into buildings, on public transportation, and more easily stored in compact living quarters or aboard a car, boat or plane.