The right choice for owners of Shimano 12-speed Di2 road equipment who need a genuine replacement or spare charging cable for home, workshop or travel use.
The Shimano EW-EC300 is the dedicated charging cable for Shimano 12-speed Di2 road drivetrains. It connects to the charging port on the rear derailleur, so you can top up the system through a single, easily accessible connection rather than removing components or managing multiple charger leads.
With its 1.5 m cable length, there is useful flexibility when charging at home or in the workshop. The USB-A connection works with compatible USB power sources, while the dedicated connector provides the secure, purpose-built fit expected from a genuine Shimano cable.
The EW-EC300 also charges the compatible FC-R9200-P power meter crankset, making it a practical cable to keep with a Dura-Ace Di2 setup. BikeRadar’s hands-on assessment describes the genuine cable as well built, durable and reliable in everyday use, although its 70 g weight and USB-A interface make it better suited to home or workshop storage than carrying in a small saddle bag.
Dedicated 12-speed Di2 charging
Designed for Shimano’s 12-speed electronic road drivetrains, including the Dura-Ace R9200, Ultegra R8100 and 105 R7150 series.
Rear derailleur connection
Connects directly at the rear derailleur, giving your drivetrain a simple single-port charging setup.
Charges compatible power meters
The same cable can recharge the Shimano FC-R9200-P power meter crankset.
Useful 1.5 m reach
The 1.5 m length gives you practical freedom to position the bike near a charger or workshop power source.
USB-A interface
Uses a standard USB-A connection for compatible wall adapters, computers and other USB power sources.
Purpose-built Shimano fit
The genuine cable is built for a secure connection and dependable charging, without relying on third-party adapters.
General
Dimensions
Compatibility
Shimano Di2
Provides the charging connection for Shimano’s 12-speed electronic road drivetrain, with the cable attaching at the rear derailleur.
EC300 charger cord
A dedicated charging cable for Shimano 12-speed Di2 road systems that can also be used to charge the FC-R9200-P power meter.
Shimano is a Japanese component brand founded in 1921 in Sakai, Osaka. The company began with bicycle component manufacturing and has grown into a global business focused on bicycle components, fishing tackle and rowing equipment, while keeping its headquarters in Sakai.
In cycling, Shimano is best known for building complete component ecosystems that span road, mountain, gravel, commuting and e-bike use. Its range covers drivetrains, brakes, wheels, pedals, shoes and related parts, and the brand has had a long presence in Australia through a local business established in Sydney in 1992.
