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Shimano introduces carbon Dura-Ace crankset |
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Thursday, 30 August 2007 |
Shimano is introducing a carbon fiber Dura-Ace
crankset FC-7800C with an aluminum core to realize a lightweight yet very
rigid construction. By using this technology, Shimano developed a crankset
that combines the best of both materials. The aluminum frame ensures a
stiff set-up for optimal power transfer while the carbon saves weight.
In numbers: weight of this crankset (including bottom bracket) is 709 grams
and it is 10% stiffer than the aluminum Dura-Ace crankset FC-7800 that
is already famous for its rigidity.
FC-7800C has been developed with Shimano’s
proven HOLLOWTECH II technology with an integrated bottom bracket. It uses
identical bottom bracket bearing cups as FC-7800. The left crank arm features
the same installation technology as current Shimano XTR to save some weight
and to make installation even easier.
This state-of-the-art crankset will be available
in gear combinations 53/39T and 52/39T in crank arm lengths 170, 172.5
and 175mm.
Shimano has twenty years of experience in
the development of carbon fiber products, by using it in our high end fishing
tackle range and also more recently for bicycle components such as Dura-Ace
rims and shoe soles. We did not use it in cranksets before, since our tests
showed over and over again that by using carbon alone, in general the weight
goes down but also the rigidity decreases. By using an aluminum core however,
Shimano has managed now to develop a crankset that is lighter and more
rigid at the same time.
Michael Boogerd (Team Rabobank) and Markus
Fothen (Team Gerolsteiner) have taken this crankset already to the ultimate
test: the Tour de France. They were pleased with the combination of lighter
weight, optimal rigidity and an attractive design.
Available as after market product from
Spring 2008
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