Shimano EW-SD300-I Di2 Wire for E-Tube System (2nd Gen.) - Internal Cable Routing

Shimano EW-SD300-I Di2 internal cable for electronic shifting systems. Designed for 2nd generation E-Tube compatible drivetrains, this wire enables clean internal cable routing through your frame for a sleek, protected setup. Essential replacement or upgrade component for Di2-equipped bikes seeking streamlined aesthetics and reliable signal transmission. Compatible with Shimano's latest electronic groupsets.