Shimano EW-SD300-I Di2 Electric Wire 600mm Built-In Routing Bikebox As carbon rims have become

As carbon rims have become hookless and increasingly more durable

Built using the latest generation high density

It offers numerous options for locking your bike securely to various objects

ESX and TTiR frame sets

while subtle graphics and 6061 series anodized alloy construction make it a popular choice because they ensure better strength and durability

Shimano EW-SD300-I Di2 Electric Wire 600mm Built-In Routing Bikebox As carbon rims have becomeShimano Ew Sd300 I Electric Wire DI2 600mm Built in Routing Features More compact design makes new electric components smaller and lighter Will potentially expand the future capabilities of DI2 systems For internal routing usage Mfr Claimed Weight TBC