High end shifter/brake dual control lever Shimano ULTEGRA Di2 ST-6870 for front 2-speed derailleur
Compatible with 2x11-speed drivetrain
Similar operation to mechanical Ultegra for intuitive use
Water-resistant E-tube cables for durable performance
Diagnose problems and customize function with Shimano E-tube Project
Digital operation reduces the chance of human errors and minimizes the chance of missed shifts
Improved top-side brake lever access with closer pivot location for better control from multiple hand positions
Automatic trim function for stress-free riding
Efficient design for increased weight savings
Flight Deck compatible wireless speed
Weight: ~ 150 g
SEIS - innovative shift technology based on the SHIMANO INDEX SYSTŪRES IZNESUMI
(SIS) that has proved its superior gear changing characteristics over the years. The big difference is that in this case, the shifting action is provided for by electronics instead of mechanics. This electronic shifting system has been extensively tested over past two years by several professional riders in all conditions possible, such as rain, mud, low temperatures, cobble stone roads and combinations of all of these at the same time. Shifting is executed by simply pressing the button. No power is needed to shift, which gives important advantages since it is easier now to always keep a tight grip on the handlebar and to keep your concentration on riding instead on shifting. The shift system allows accurate and effortless shifting in difficult circumstances for example when you have cold hands or when you are completely exhausted. Furthermore, the shifting performance will never be affected by contaminated or stretched cables since the shifting signal is transferred electronically. The operating buttons work similarly to mechanical DUAL CONTROL LEVER so you dont need to re-program your mind for the SEIS.
SLR-EV is SLR with a dual symmetric pivot brake caliper. The short-arm brake design employs two bearings and a roller to realize greater efficiency in the pivot area and deliver superior modulation and power for braking.
Di2 - The advantages of Di2 (Digital Integrated Intelligence) are clear for everybody who has tested it: changing gears becomes easier, effortless and faster by simply touching the shift buttons. Control at the top of your fingers. Additional benefits include an automatic trimming front derailleur, unmatched precision plus super easy installation and adjustment. This allows automatic chain guide movement in response to the gear position of the rear derailleur. There is no more need for concentration on trimming when riding.
Important: All Shimano Di2 electronic components require the same firmware version. In order to diagnose, read or update firmware, optional device is needed. Operating components with different firmware version may cause malfunction or loss of function.