The power house of Dura-Ace (7970) and Ultegra (6770) Di2 is a long-life 7.4V Li-Ion battery that is both compact and reliable, taking shifting effort away from you.
|Bottom Bracket Type:||Threaded|
|No. Of Chainrings:||Double|
|Cassette Range:||11-28 Tooth|
Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads.
Using a hard wired battery system which is both light weight and accurate compared to current wireless technology (as a wireless system would require 4 batteries: one for the RD, one for the FD, and one for each shift lever).
The use of a single small and discreet battery is light weight, efficient and creates a robust and reliable system.
One charge can give between 1000 and 2000 kilometre range depending on conditions and front mech operation (as this is the main power drain).
Shimano are the makers of the world's most well known cycle component brand. Established in 1921 when the first cycle freewheel was forged. Shimano produce drivetrains, wheels, pedals, shoes, cycling clothing and pretty much every Shimano cycle accessory you can think of! Famous for their top end products ridden by the pro's, Dura-Ace and XTR, which cover both road and MTB's. At Shimano, they're doing everything they can to respond to heightened environmental concerns. Shimano are proud to be a producer of bicycle components that help people to enjoy outdoor sports and interact with nature through healthy non-polluting activities. In their 87 plus years of existence Shimano have accumulated a wealth of technology and product development and expertise that serves as the driving force behind their continually evolving product line.
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