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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Bottom Brackets Brake Systems
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WTB Cantilever BrakeWILDERNESS TRAILS BIKES SPEEDMASTER ROLLER CAM BRAKESTANDARD AND COMPACT
This WTB design was the first true MTB specific brake and fits U-Brake studs only and uses a triangular cam plate that pulls between 2 sealed bearing pulleys (1 in the top of each arm). This design is much more powerful than most cantilevers. At the bottom of the arm is a highly adjustable brake pad. mount for precision tuning of the brake pad. At the top of the arm is a pulley fastened by a post which protrudes to accept the arm return spring, while the pulley runs against a cambered plate. The brake cable pulls up on the cambered plate. As the plate is drawn up it pushes against the pulley at the top forcing the pulleys apart. The arm pivots on the U-Brake stud forcing the brake pad into contact with the rim, to brake the bike. This works so well because every moving part has a lube port and is designed to reduce friction. All the parts are replacable. WTB makes one pulley isze with three cam sizes. Wider cams are available for spacing which is extra wide at the mounting stud. There are two versions of this brake, a standard and a compact model. Which version you require is determined by measuring the distance from the center of the rear axle to the center of the brake pivot post (U-Brake mounting stud). If it is between 12 7/16" and 12 5/8" the standard model is correct. If it's between 12 1/4"and 12 7/16" you need the compact model. Again measure along the center of the chainstay to obtain an accurate distance. It uses non-threaded brake pads and comes in Black or Silver. The Roller Cam weighs 156.5 grams, the included mounting bolts weigh 12.5 grams, and the included Eagle Claws weigh 47 grams, bringing the total weight to 216 grams. Color-BK-S $ Price in Catalog WTB SPEEDMASTER CANTILEVER BRAKE
The WTB Speedmaster uses a tubular arm design with a linear spring rather than a coiled spring. They are available in Silver. $ Price in Catalog WTB TOGGLE CAM BRAKE
WTB makes a mecahnically linked Toggle Cam brake. Intended for suspension use, it will fit U-Brake studs only. Made in Silver only. $ 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... |
