Smooth and light roller bearing action. Direct mount for improved aerodynamics. The item "Shimano Dura Ace DA Di2 9070 Full Groupset Electronic Group Set Road Bike 11S" is in sale since Saturday, August 12, 2017.This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Groupsets". The seller is "inbike" and is located in Hong Kong. This item can be shipped worldwide.