Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have.
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Reach BikePro on a 24 hour basis at 803-280-1537 Terry Dunbar is on duty as the technical expert, who also speaks Spanish as well as English and has quantities on hand information. Call her now for any questions about Bike Pro you may have. |
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Mavic Bottom BracketMAVIC 610/616 SERIES BOTTOM BRACKET
Mavic's specially designed bottom bracket requires personal courage, real expertise, or professional installation, but will last you a life time. This bottom bracket is another variation of the floating style bottom bracket unit, this one is made to achieve very fine and minute adjustments. Installation requires that your bottom bracket shell is re-faced to make the shell faces perfectly parallel and chamfer the inner lip of the B/B shell slightly. The re-facing to make this B/B fit will require the elimination of the outer few threads inside the B/B shell. This is done to accept Mavic's special mounting rings that use a threaded compression fit. As the threaded aluminum lockrings are tightened, they compress 45 degree chamfered sides into the B/B fixing the bottom bracket in place. The body of the unit is an aluminum tube into which sealed bearing cartridges are fit and then seated with an internal aluminum lockring (similar to their hub design). The spindle is made of hollow machined steel and available in seven lengths. Also included are a pair of steel crank bolts and washers, (33 grams). With the spindle in place the entire unit is held by beefy aluminum locking compression rings at each end. You can adjust your chain line easily due to the bottom bracket's floating design. This B/B has the bearings positioned at the extreme ends of the bottom bracket shell, which increases support, and lengthens the life of the bottom bracket. Available in spindle lengths of 114mm, 116mm, 119mm, 123mm for Road bike use, and 124mm, 128mm, or 134mm for mountain riders. The 114mm Road model weighs 317 grams, including the 33 grams crank bolt/washers. In the 134mm spindle length, it weighs 365 grams, (including the crank bolts and washers which weigh 33 grams), it isn't the lightest, but is one of the smoothest bottom brackets available. This bottom bracket is your only salvation if you've somehow seriously cross threaded or stripped the threads of your B/B shell, because it can be installed in a shell lacking inner threads. Spindle Length-14-16-19-23 $Price in Catalog |
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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... |
