Shimano EW-SD300-I Di2 Electric Wire 350mm Built-In Routing BIKESPORTZ 4mm hookless inner rim width

4mm hookless inner rim width offers better tire sidewall support and improved control

This is a combination of the UT-BB140 tool and the UT-BB141 adapter to be able to mount Campagnolo Ultra-Torque and Over-Torque bearing shells

Mfr  Claimed Weight

ETRTO size: 622x19TC

True to its name

Shimano EW-SD300-I Di2 Electric Wire 350mm Built-In Routing BIKESPORTZ 4mm hookless inner rim widthShimano Ew Sd300 I Electric Wire DI2 350mm 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