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Stem (bicycle Part)
The stem is the component on a bicycle that connects the handlebars to the steerer tube of the bicycle fork. Sometimes called a ''goose neck'', a stem's design belongs to either a ''quill'' or ''threadless'' system, and each system is compatible with respective headset and fork designs: * Quill: the stem inserts into the steerer tube, which is threaded and does not extend above the headset. * Threadless: the stem clamps around the steerer tube, which is not threaded and extends above the headset. Quill versus threadless Although stems are commonly referred to as being of either the quill or threaded type, the thread in question is the one on the fork steerer tube. Quill stems require a steerer tube of the same length as the headset and head tube combined and thus must be matched to the specific bicycle model. Threadless systems use an unthreaded steerer tube, which extends into the stem and may be cut to length as desired in order to accommodate the height of the headset, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3ttt Ernesto Colnago Road Bicycle Stem
KIIS 1011 (official callsign: 3TTT) is a commercial broadcasting, commercial FM radio station broadcasting in Melbourne, Victoria, Australia, on a frequency of 101.1 MHz and is the Melbourne affiliate of Australian Radio Network, ARN's KIIS Network. The station was formerly known as 3DB and 3TT, broadcasting on 1026 kHz AM, before converting to FM in 1990. History 3DB 3DB was awarded its broadcast licence in 1925 but did not immediately come on air due to debates in Federal Parliament as to whether or not Australia should proceed with the then-unique system of A Class (later Australian Broadcasting Corporation, ABC) and B Class (later commercial) stations.Griffen-Foley, Bridget, ''Changing Stations: The Story of Australian Commercial Radio'', University of New South Wales Press, 2009, Sydney The station was originally owned by Druleigh Business and Technical College Pty Ltd,McLaughlin, Bill, ''From Wireless to Radio: The 3DB Story'', Herald & Weekly Times Melbourne, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycle Handlebar
A bicycle handlebar is the steering control for bicycles. It is the equivalent of a tiller for vehicles and vessels, as it is most often directly mechanically linked to a pivoting front wheel via a Stem (bike), stem which in turn attaches it to the Bicycle fork, fork. Besides steering, handlebars also often support a portion of the rider's weight, depending on their riding position, and provide a convenient mounting place for Bicycle brake, brake levers, Shifter (bicycle part), shift levers, cyclocomputers, Bicycle bell, bells, etc. History The dandy horse, or draisienne, invented by Karl Drais and the first vehicle with two wheels arranged in tandem, was controlled by a bar connected to the front steering mechanism and held by the riders' two hands. The first handlebars were solid bars of steel or wood, depending on the manufacturer. Curved, moustache-shaped, drop handlebars became popular in the 1920s. Whatton bars were developed in attempt to improve the safety of penny-farth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tandem Bicycle
A tandem bicycle or twin is a bicycle (occasionally a tricycle) designed to be ridden by more than one person. The term tandem refers to the seating arrangement (fore to aft, not side by side), not the number of riders. Patents related to tandem bicycles date from the mid-1880s. Tandems can reach higher speeds than the same riders on single bicycles, and tandem bicycle racing exists. As with bicycles for single riders, there are many variations that have been developed over the years. Terminology The term tandem refers to the seating arrangement (fore to aft, not side by side), not the number of riders. A bike with two riders side by side is called a sociable. Tandem bicycles are sometimes called "Daisy Bells". This is in reference to " Daisy Bell (Bicycle Built for Two)" which is a popular song, written in 1892 by British songwriter Harry Dacre, with the well-known chorus, "Daisy, Daisy / Give me your answer, do. / I'm half crazy / all for the love of you", ending with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coil Spring
A tension coil spring A coil spring is a mechanical device that typically is used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. It is made of an elastic material formed into the shape of a helix that returns to its natural length when unloaded. Under tension or compression, the material (wire) of a coil spring undergoes torsion. The spring characteristics therefore depend on the shear modulus. A coil spring may also be used as a torsion spring: in this case the spring as a whole is subjected to torsion about its helical axis. The material of the spring is thereby subjected to a bending moment, either reducing or increasing the helical radius. In this mode, it is the Young's modulus of the material that determines the spring characteristics. Spring rate A selection of conical coil springs Spring rate is the measurement of how much load (in pounds) a coil spring can hold until it compresses . The spring r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer
A polymer () is a chemical substance, substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeat unit, repeating subunits derived from one or more species of monomers. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins that are fundamental to biological structure and function. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers. Their consequently large molecular mass, relative to small molecule compound (chemistry), compounds, produces unique physical property, physical properties including toughness, high rubber elasticity, elasticity, viscoelasticity, and a tendency to form Amorphous solid, amorphous and crystallization of polymers, semicrystalline structures rath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linkage (mechanical)
A mechanical linkage is an assembly of systems connected so as to manage forces and Motion, movement. The movement of a body, or link, is studied using geometry so the link is considered to be Rigid body, rigid. The connections between links are modeled as providing ideal movement, pure rotation or Sliding (motion), sliding for example, and are called joints. A linkage modeled as a network of rigid links and ideal joints is called a kinematic chain. Linkages may be constructed from open chains, closed chains, or a combination of open and closed chains. Each link in a chain is connected by a joint to one or more other links. Thus, a kinematic chain can be modeled as a graph in which the links are paths and the joints are vertices, which is called a linkage graph. The movement of an ideal joint is generally associated with a subgroup of the group of Euclidean geometry, Euclidean displacements. The number of parameters in the subgroup is called the degree of freedom (mecha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallelogram
In Euclidean geometry, a parallelogram is a simple polygon, simple (non-list of self-intersecting polygons, self-intersecting) quadrilateral with two pairs of Parallel (geometry), parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. The congruence (geometry), congruence of opposite sides and opposite angles is a direct consequence of the Euclidean parallel postulate and neither condition can be proven without appealing to the Euclidean parallel postulate or one of its equivalent formulations. By comparison, a quadrilateral with at least one pair of parallel sides is a trapezoid in American English or a trapezium in British English. The three-dimensional counterpart of a parallelogram is a parallelepiped. The word "parallelogram" comes from the Greek παραλληλό-γραμμον, ''parallēló-grammon'', which means "a shape of parallel lines". Special cases *Rectangle – A par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suspension (vehicle)
Suspension is the system of tires, tire air, spring (device), springs, shock absorbers and Linkage (mechanical), linkages that connects a vehicle to its wheels and allows relative motion between the two. Suspension systems must support both road holding/Automobile handling, handling and ride quality, which are at odds with each other. The tuning of suspensions involves finding the right compromise. The suspension is crucial for maintaining consistent contact between the road wheel and the road surface, as all forces exerted on the vehicle by the road or ground are transmitted through the tires' contact patches. The suspension also protects the vehicle itself and any cargo or luggage from damage and wear. The design of front and rear suspension of a car may be different. History An early form of suspension on ox-drawn carts had the platform swing on iron chains attached to the wheeled frame of the carriage. This system remained the basis for most suspension systems unti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Softride Suspension Bicycle Stem
Softride was a manufacturer of bicycles located in Bellingham, Washington. They specialized in bicycles for triathletes. The bicycle frames were distinctive for their lack of seat tubes and seat stays. The idea was to reduce aerodynamic drag and improve ride comfort. The company no longer manufactures bicycles, and focuses on bicycle carriers instead. The design was developed by James Allsop and David Calopp, and became the most successful of the beam suspension systems. It was intended as a retrofit for traditional diamond frame bicycles, at first, but there were concerns about causing frame damage. Notable Softride users include Greg Welch and Jürgen Zäck. In a survey of bicycles ridden at the 1996 Ironman World Championship in Kona, Hawaii, there were 126 Softrides, out of 857 total bicycles, representing 14.7%. That was an increase from the 11.9% of 798 bicycles in 1995. Softride Suspension System The Softride Suspension System was launched at the Interbike 1989 bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suspension Stem
Suspension or suspended may refer to: Science and engineering * Car suspension * Cell suspension or suspension culture, in biology * Guarded suspension, a software design pattern in concurrent programming suspending a method call and the calling thread until a precondition (guard) is satisfied * Magnetic suspension, a method by which an object is suspended with no support other than magnetic fields * Suspension (topology), in mathematics * Suspension (dynamical systems), in mathematics * Suspension of a ring, in mathematics * Suspension (chemistry), small solid particles suspended in a liquid ** Colloidal suspension * Suspension (mechanics), system allowing a machine to move smoothly with reduced shock * Suspensory behavior, arboreal locomotion of primates * Suspend to disk, also known as hibernation, powering down a computer while retaining its state. * The superstructure of a suspension bridge Temporary revocation of privileges * Suspension (punishment), temporary exclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major Taylor
Marshall Walter "Major" Taylor (November 26, 1878 – June 21, 1932) was an American professional Cycle sport, cyclist. He has been called "the first Black American global sports superstar." He was born and raised in Indianapolis, where he worked in bicycle shops and began racing multiple distances in the Track cycling, track and Road bicycle racing, road disciplines of cycling. As a teenager, he moved to Worcester, Massachusetts, with his employer/coach/mentor and continued his successful amateur career, which included breaking track records. Taylor turned professional in 1896, at the age of 18, living in cities on the East Coast of the United States, East Coast and participating in multiple track events including Six-day racing, six-day races. He moved his focus to the Sprint (track cycling), sprint event in 1897, competing in a national racing circuit, winning many races and gaining popularity with the public. In 1898 and 1899, he set numerous List of world records in track ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Bike
A mountain bike (MTB) or mountain bicycle is a bicycle designed for off-road cycling (''mountain biking''). Mountain bikes share some similarities with other bicycles, but incorporate features designed to enhance durability and performance in rough terrain, which often makes them heavier, more complex and less efficient on smooth surfaces. These typically include a bicycle fork, suspension fork, large knobby tires, more durable Bicycle wheel, wheels, more powerful brakes, straight, wide handlebars to improve balance and comfort over rough terrain, and wide-ratio gearing optimized for topography, application (e.g., steep climbing or fast descending) and a frame with a bicycle suspension, suspension mechanism for the rear wheel. Rear suspension is ubiquitous in heavier-duty bikes and now common even in lighter bikes. Dropper seat posts can be installed to allow the rider to quickly adjust the seat height (an elevated seat position is more effective for pedaling, but poses a hazard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
