原文链接
http://www.bikerumor.com/2013/06/30/shimano-unveils-hydraulic-road-discs-with-r785-di2-system-and-11-speed-ultegra-di2/ 
Shimano’s ST-R785 shifter and BR-R785 hydraulic disc brakes
ST-R785 Shifter on the left, Shimano Ultegra 6870 Shifter on the right.
IceTech SM-RT99 Centerlock Rotors
R785 Weights:
ST--R785 – 515g
BR-R785 – 263g
Brake Hose (BH59) – 61.5g
Mineral Oil – 21.5g
Rotor – RT-99 (140mm) – 205g
简单翻译部分要点 凑合看哦
The beauty of the ST-R785 shifters and BR-R785 hydraulic disc brakes is that thanks to the E-Tube wiring system, the R785 group can be added to any E-tube equipped Di2 group. That means Dura Ace 9070, new 11 speed Ultegra 6870, and 10 speed Ultegra 6770.
好像说这个刹车兼容9070 6870 和6770 可怜的7970啊
The same goes for upgrading a 6770 10 speed Di2 group to 11 speed – the drivetrain would need to be replaced, but you could keep the 6770 shifters as they will be compatible with the 6870 parts.
6770 手变可以升级固件兼容6870 后拨和前拨
Almost overshadowed by the hydraulic discs, the new 11 speed Ultegra Di2 includes the expected extra gear, but also drops a total of 126g and adds some new features as well. One of the most welcome is a redesigned rear derailleur that has a wider link for better shifting and is offered in a mid-cage GS version which will allow up to a 32t rear cog – a first for Di2.
新的11速 UT Di2 减重126g 有中腿版本 能兼容32T的飞轮
6870′s E-Tube wiring system is also updated to offer a cleaner install while making the addition of satellite shifters and special programming easier.
安装更加简洁，也为冲刺按钮和其他功能实现提供便利
In order to drop the 126g over 6770 Di2, you will need to use the internal battery for the system, for a combined total weight of 2359g. Otherwise, with the external battery the 6870 Di2 system is only 69g lighter but hey, lighter weight and another gear is good, right? 6870 is also 9g lighter than 6800 mechanical with the internal battery. Weights are with an 11-23 cassette, 114 link chain, and a 170mm 53-39 crankset.
要减重，要内置电池！！！立减126g 内置的只减了69g
整套6870 2359g 6800 轻9g
As for the R785 system, the complete system including shifters, brakes, hoses, mineral oil, and two RT-99 rotors works out to be 1066g. Compared to 6870 shifters with rim brakes, the hydraulic system adds less than a pound – somewhere around 340g.
油碟的比机械的多了340g，电子秤党绕路吧
最后来个整车的 捷安特的破风 CX
[ 此帖被fduyuanzi在2013-07-01 01:36重新编辑 ]
