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Technical FAQ: Installing electronic shifting on a bike without internal cable routing

The Ultegra Di2 wire’s 5mm connector easily fits through the 8mm-by-7mm frame hole; the grommet pushes in, upper edge first. Photo: Lennard Zinn | VeloNews.com

The Ultegra Di2 wire’s 5mm connector easily fits through the 8mm-by-7mm frame hole; the grommet pushes in, upper edge first. Photo: Lennard Zinn | VeloNews.com