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Stem (bike)
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 FM radio station broadcasting in Melbourne, Victoria, Australia, on a frequency of 101.1 MHz and is the Melbourne affiliate of 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 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, 1985 hence the callsign DB. 3DB eventually made its on-air debut on 21 February 1927 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BMX Bike
A BMX bike is an off-road sport bicycle used for racing or stunt riding. BMX mean''s bicycle'' ''motocross''. Construction Though originally denoting a bicycle intended for BMX racing, the term "BMX bike" is now used as a generic term to encompass race bikes ('class' and 'cruiser') and those used for freestyle disciplines (street, vert, park, flatland), and dedicated dirt jumper bicycles. Frames are made of various types of steel, aluminum, or carbon fiber. Cheaper, low-end bikes are usually made of steel. Higher range freestyle bikes are mostly chromoly, such as lightweight 4130 chromoly, or generation 3 chromoly. BMX race bikes extensively use aluminum or carbon fiber. Models BMX bicycles are available in these models types: * Dirt – These bikes feature tires with thicker and wider tread for better grip on potentially loose surfaces. * Flatland – flatland style BMX bikes have different frame geometry to traditional park BMX bikes because flatland riding requ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seatpost
A bicycle seatpost, seatpin, saddlepole, saddle pillar, or saddle pin is a tube that extends upwards from the bicycle frame to the saddle. The amount that it extends out of the frame can usually be adjusted, and there is usually a mark that indicates the minimum insertion (or maximum extension). Seatposts can be made of steel, aluminum, titanium, carbon fiber, or aluminum wrapped in carbon fiber. Attachment points Seatposts generally clamp directly onto saddle rails with which they must be compatible, while old or inexpensive seatposts slide into a separate clamp that then clamps the saddle rails. To attach it to the bicycle's main frame, the seatpost is inserted into the seat tube, which must be of a very slightly larger diameter (or a cylindrical shim can be used). The seatpost is held in place by squeezing the top of the seat tube with a tightening ring (temporarily reducing its diameter; a vertical slit cut into the tube allows this to happen without crumpling) until the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tandem Bicycle
A tandem bicycle or twin is a form of 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 w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coil Spring
A selection of conical coil springs The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fibulae - the clasps worn by Roman soldiers among others. These are quite commonly found in Roman archeological digs. Coil springs can be either compression springs, tension springs or torsion springs, depending on how they are wound. A coil spring is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded. They are commonly used in mattresses, automotive suspensions, and residential plumbing. Coil springs come in a variety of sizes and shapes and can be used for a variety of applications. Small coil springs are often us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymer
A polymer (; Greek '' poly-'', "many" + ''-mer'', "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. 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 compounds, produces unique physical properties including toughness, high elasticity, viscoelasticity, and a tendency to form amorphous and semicrystalline structures rather than crystals. The term "polymer" derives from the Greek word πολύς (''polus'', meaning "many, much") and μέρος (''meros'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linkage (mechanical)
A mechanical linkage is an assembly of systems connected to manage forces and movement. The movement of a body, or link, is studied using geometry so the link is considered to be rigid. The connections between links are modeled as providing ideal movement, pure rotation or 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 displacements. The number of parameters in the subgroup is called the degrees of freedom (DOF) of the joint. Mechanical linkages are usually designed to trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallelogram
In Euclidean geometry, a parallelogram is a simple (non- self-intersecting) quadrilateral with two pairs of 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 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 just 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 etymology (in Greek παραλληλ-όγραμμον, ''parallēl-ógrammon'', a shape "of parallel lines") reflects the definition. Special cases *Rectangle – A parallelogram with four angles of equal size (right angles). * Rhombus – A parallelogram with four sides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suspension (vehicle)
Suspension is the system of tires, tire air, springs, shock absorbers and linkages that connects a vehicle to its wheels and allows relative motion between the two. Suspension systems must support both road holding/ handling and ride quality, which are at odds with each other. The tuning of suspensions involves finding the right compromise. It is important for the suspension to keep the road wheel in contact with the road surface as much as possible, because all the road or ground forces acting on the vehicle do so through the contact patches of the tires. 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 until the turn of the 19th century, although the iron c ... [...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 * 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 * Cell suspension or suspension culture, in biology * Suspension (mechanics), system allowing a machine to move smoothly with reduced shock * The superstructure of a suspension bridge * Suspensory behavior, arboreal locomotion of primates * Magnetic suspension, a method by which an object is suspended with no support other than magnetic fields * Car suspension Temporary revocation of privileges * Suspension (punishment), temporary exclusion as a punishment ** Suspension from the UK parliament ** Suspension (Catholic canonical penalty) * Suspension of driving privileges ("suspended driver's license") * Administrative License Suspension (ALS), US, driving license suspension without a court hearing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major Taylor
Marshall Walter "Major" Taylor (November 26, 1878 – June 21, 1932) was an African-American professional cyclist. Even by modern cycling standards, Taylor could be considered the greatest American sprinter of all time. He was born and raised in Indianapolis, where he worked in bicycle shops and began racing multiple distances in the track and 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 and participating in multiple track events including six-day races. He moved his focus to the 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 world records in race distances ranging from the quarter-mile () to the two-mile (). Taylor won the 1-mile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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