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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Shimano Chains
SHIMANO HYPERGLIDE HG50 CHAINThis 327.5 gram chain is designed to work with any Hyperglide freewheel or cassette. The HG50 is Shimano's economical narrow Hyperglide chain. It has 114 1/2" x 3/32" links, with nickel finished link pins and rollers incorporated into its bushingless design. The cambered outer link plates widen between the rollers with beveled inner surfaces on the top and bottom. Recommended as an original or replacement chain for STX and Alivio groups as well as the Road RX100. It will, however, work in any HyperGlide application, and will replace all HG chains. STI compatible, all Black. We have seen this chain labeled as made in Taiwan and in Japan. $Price in Catalog
SHIMANO HYPERGLIDE HG70 CHAINThe HG-70 is a 310 gram, narrow chain that will work with any freewheel or Shimano Hyperglide cassette. It is 114 links long using a grey finish on the roller plate and a black finish on the pin link plate, with link pins that are nickel finished. It has the cambered outer link plates with the beveled inner surfaces that all Hyperglide chains have. Recommended as an original, or replacement chain for the 105 SC Road groups, or the Deore LX or lower Mountain groups. STI compatible, Grey/Black. Made in Japan. $ Price in Catalog
SHIMANO HYPERGLIDE HG90 CHAINThe HG-90 is a narrow chain that will work with any freewheel or Shimano Hyperglide cassette. It weighs 331.5 grams, which is more than the HG70, in part, because it has 116 links instead of 114, (if the HG70 had 116 links, it would weigh about 315.5 grams) The remaining added weight is probably from the plated outer link plates. The HG90 provides quick, precise, quiet shifting. The outer link plates are cambered with beveled inner surfaces for ease in centering on chainring ring teeth. It is commonly used as original equipment in Ultegra and Deore XT drivetrains, but will work with any system, HyperGlide or not. This chain is said to be heat treated to give it a long extended life. It has a Black finish on the roller plate and a Silver finish on the pin link plate. Made in Japan $ Price in Catalog
SHIMANO HYPERGLIDE HG91 CHAINThe same as above except the color, the HG-91 is all silver. The HG-91 is a narrow chain that works with any freewheel or Shimano Hyperglide cassette. It also weighs 331.5 grams, and has 116 links producing a quick, precise, quiet shifting. It is used in Ultegra and Deore XT drivetrains, or any Hyperglide application. This chain is also said to be heat treated for long life. It has a silver finish on both the roller and pin link plates. Notice how much more the all Silver model costs. Made in Japan. $ Price in Catalog
SHIMANO 7401 DURA-ACE / XTR CHAINThis is Shimano's best chain. It is a narrow, premium racing chain using heat treated plates, with a nickel finish to cut down the friction, and uses precision, boron finished link pins. These treatments are used to make an extremely long wearing chain. The 7401 is a narrow chain that works with any freewheel or cassette whether Hyperglide or not. It is the chain that comes as original equipment with the XTR Mountain or Dura-Ace Road group of parts. At only 335 grams, this 116 link chain should improve the shift performance of any bike. Both the roller and pin link plates have a Silver Nickel plated finish. Made in Japan. $ 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... |
