Shimano officially unveiled a new group of top-end highway equipment Dura-Ace DA9000 DA9070. Refreshed, and mechanical and electronic band.
Says Eric Doyne, Shimano's PR manager in North America: "The company does a lot to maximize the options, mounting options and switch, we try to satisfy the needs of customers with any queries."
As suspected, the main changes are obvious, it's losing weight and even better to switch.
Shimano claim that a group of mechanical Dura-Ace DA9000 is the best ever designed, and recommends just to try, so you can check how well it works.
Manager for Shimano Brake Products Wayne Stetina, advises followers mehancheskih transmissions experience the Di2, and you're likely to rethink their position.
Dura-Ace DA9000 manual group
The big question: why go to 11 speed?
The most important thing - is you get good gear ratios. Compared with 10-speed cassette if you use the 11-25, the 11th star 28T - adds a really nice mountain gear. One cassette can successfully use it in virtually any environment.
Shimano DA9000 is odinnadtsatiskorostnoy group. And there is no compatibility between this group and its predecessor, 7900. The thickness of the stars will be the same as before, but changed the chain and tooth profiles for 11 speeds.
Perhaps the most surprising team in the updated Shimano Dura-Ace cranks chetyrehlapye is asymmetric. They will be available in six versions: 55/42 - 54/42 - 53/39 - 52/36 - 52/38 - 50/34.
This is quite a lot for mass production, you are free to create their own equipment. But we need to know what Shimano recommends the use of design kits star system because there are nuances. For example: 52T each star is different from that in the pair with which it works 36T or 38T. There are no official statements on the retail prices of stars.
Dura-Ace cassette will be available in five versions:
11-23: 11-12-13-14-15-16-17-18-19-21-23
11-25: 11-12-13-14-15-16-17-19-21-23-25
11-28: 11-12-13-14-15-17-19-21-23-25-28
12-25: 12-13-14-15-16-17-18-19-21-23-25
12-28: 12-13-14-15-16-17-19-21-23-25-28.
As front-star, star magazine in thickness remain the same, but change the distance between them. The entire cassette is widened to 1.85 mm, which is drawn in an increase in the width and changing the design frihaba sleeves. The first five-star titanium cassettes, the remaining six - steel.
New odinnadtsatiskorostnaya chain has a width of 5.62 mm and 5.88 mm desyatiskorostnaya. Internal dimensions remained unchanged, but the side plates are 0.08 mm thinner. The external plate circuit does not have slots and chain pins are hollow. Total chain eased to 9 grams. It will be covered with a special compound, which are covered by the cables, it is estimated this coating will prolong chain life by 20% and will shift softer. On the strength of the chain of weight loss will not be affected. The new chain will not odinnadtsatiskorostnaya universal. For mountain groups are other Shimano chain.
Shimano has made significant relief switching came not only with new guns, but also new ropes with a special coating. Under the microscope it vyglyalit as a set of tubes, because of this structure is better rope slips on his shirt and holds the grease. Bowden Shimano SP41 remain unchanged and are supplied filled with grease.
Next few photos of the updated mechanical Shimano Dura-Ace DA9000 and electric Di2 DA9070.
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