Ultegra takes pro-tested technologies to a wider audience. Ultegra 6870 (Di2) uses an electronic shifting system. Compared to the previous Ultegra Di2 (6770) SHIMANO improved the ergonomics of the dual control lever for easier access. Especially on top of the 'slimmer' hoods riders have more control than ever. Also the shape of the shift button improved and the contrast of the surface is more recognizable.
The derailleurs are more compact and lighter than their predecessors. The rear derailleur is updated with an automatic protection system that moves the cage out of harms way in case of a crash. There are two versions of the rear derailleur. A SS for cassettes up to 28T and a GS for cassettes up to 32T. The 32T GS rear derailleur in combination with a compact front crank setup offer a full wide gearing setup. Both rear derailleurs are featured with multi shifting. With a single press and hold of the shift button the rear derailleur goes all the way up or down the cassette.
Comes with the latest model BT-DN110 Internal Battery which is required to be compatible with Shimano EW-WU101 Wireless ANT Unit
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