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SHIMANO Ultegra Di2 SM-GM01 Internal Grommet
Super stress free operation
Digital operation reduces the chance of human error and continuous durability
Optimum ergonomics contributes to better steering control
Auto trim system makes it even more easy to ride
Ergonomic controllability
If you have internal routing, you can cleanly run your Ultegra Di2 wires with these rubber Grommets. They come in packs of four and are available in a 6mm round profile or a 7 x 8mm oval profile to match most frame's internal openings. Confused about how to build your Di2 Kit? Read our Learn Article.