Shifter Shimano

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Shifter Shimano

The shifter shimano Dura-Ace group is the most comprehensive set of high-end road cycling practice of the company Shimano. The Dura-Ace name comes from the combination of the words Dura, by the Duralumin, brand name for aluminum alloy used in the first group, and Ace the English word, which translated into the context would mean the best. The Dura-Ace group first hit the market was in 1973. From then until now, suffered numerous changes. The series began in 1978 EX, the new feature new shifter shimano rear hub. In 1980 Shimano AX Series born with large aerodynamic improvements. In 1984 the series Shimano born 7400. Come to light after a series of nine-speed shifter shimano 7700, dating from 1996. Since 2004, the series sold ten-speed Shimano 7800. At the end of 2008 saw the light of the new Dura-Ace 7900 that apart from lower weight 180g finally incorporates carbon (rear derailleur and shifters and brake) and go the famous exchange cables out of the handlebar that pass be under the handlebar tape as Campagnolo and Sram (perhaps this was the great hallmark of Shimano road). 7900 series also left one variant, the DI2 or electronic. The shifters ST-7800 stand out for their ergonomic innovation. In this model, the handle is narrower, which makes it comfortable for all hands and grips. These levers acquire the strength experienced in the field of mountain biking, but in turn is a smooth change, allowing change of development with a single finger. FC-7800 cranksets use the technology of hollow bottom bracket, integrated, forming a single piece, thus reducing the number of pieces and weight, increasing in turn the efficiency. Using Hollowtech II technology, the bottom bracket bearings are spaced further and get bigger, thus it increases the load distribution. This achieves greater rigidity in the assembly. CS-7800 cassettes are made of aluminum except their last three crowns are made of titanium, which makes them durable pieces. To make it compatible with nine-speed shifter shimano hubs, Dura-Ace cassette is considerably reduced in thickness, becoming more compact. A major new Dura-Ace group is the front derailleur FD-7800. The improvements do not only reside in its sleek design. By increasing the width of the pivot joint also increases rigidity. Flex is also removed, creating a quick and precise it is softer. RD-7800 change is notable for its wide joint design is lighter and stiffer than its predecessor. By increasing the rigidity stabilizes the chain to go through the gears, which translates into a more efficient transmission of energy. Bridges BR-7800 brake distinguishing characteristics differentiated the front caliper on the rear, thus achieving a better control under braking. Furthermore, the "bite" of the brakes is more powerful than its predecessor, thereby stopping power is higher. Text is available under the Creative Commons Attribution-Share Alike 3. 0, additional terms may apply. Read Terms of Use for more information. . .
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