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MOUNTAIN COMBINATION BARSMade for mountain bike riders, combination bars incorporate a flat style ATB bar, and handlebar extensions by using a single piece of tubing that is curved forward in a sweeping arc that sometimes may have a slight rise, turning upward at the ends. The benefits a combination bar brings to your are that you don't have to spend separately to buy a pair of bar ends. They allow multiple hand positions and have more comfortable and continuous positions in the bar end section. Because they are merely a part of the handlebar tubing, there is a weight savings because there is no cinch/clamping mechanism required. The negative is if the handlebar fails you will have to replace both the bar and extensions, also you have to be willing to accept the bar end that comes on the bar as being permanent. Stems with a wide binder tube, like the Syncros Cattleprod will not make it through the bar end curves. Naturally, combination bars can't be used with Grip Shift shifters. Combination handlebars don't come with grips. The custom is to put a handlebar tape, wrap or ribbon near the stem and then use handlebar grips to cover the extension area of the bar. |
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In-depth Information About Metals Aluminum Aluminum is extracted electrolytically from bauxite ore. It is made by the electrolysis of aluminum oxide which is found in larger concentrations within bauxite ore. Bauxite is a mixture of the hydroxides of aluminum, together with other impurities such as oxides of iron, titanium, and silicon. Bauxite is produced by the weathering and change of aluminum silicate rocks usually found in tropical and semitropical regions where climate has produced an accelerated weathering process. Bauxite is not a rare ore and is widely available in the US, the Caribbean, and Europe. Approximately 4 pounds of read the full article... Beryllium Beryllium is a specialty metal that is steel-grey metal in color, with an extremely low density, making it very light weight. At 1.85 grams to the cubic centimeter, its density compares to that of magnesium. It is also a high strength metal, making it possible to design light weight, thin membered parts with ahigh stiffness. A column made of beryllium to support a load placed directly downward on top of it, will have a greater load carrying capacity, and be lower in weight than any other metal of equal size. Until the 1950's beryllium was used read the full article... Titanium The element titanium was discovered in 1763 by an English cleric, William Gregor who was an amateur chemist with an inquiring mind. It was in the black sands of Cornwall that he discovered the new element that had up to that time, attracted little scientific interest. A few years later, an Austrian, Klaproth, extracted the same element from an ore widely known as "rutile", which is a mineral consisting of titanium dioxide (one titanium atom, two oxygen atoms), that is a reddish-brown substance with a slight metallic luster. While rutile is the highest grade read the full article... Metallurgic Hardness Testing There are three types of tests used with accuracy by the metals industry,they are the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. Hardness is the property of a metal which gives it the ability to resist being permanently deformed (bent, broken, or have its shape changed), when a load is applied. The greater the hardness of the metal, the greater resistance it has to deformation. Since the definitions of metallurgic ultimate strength and hardness are rather similar, it can generally be assumed read the full article... |
