Shimano Dura-Ace ST-R9270-RF Di2 Shift/Brake Lever - Right, 12-Speed, Black Apparel Brand_Supacaz Always check with your rim

Always check with your rim manufacturer to verify rim & tire compatibility before assembly or use

Each switch has the option for multi-shift ON or OFF

This is the laminar boundary layer

Tire Size: 650b x 47mm

Compatible with round seat posts from 27

Shimano Dura-Ace ST-R9270-RF Di2 Shift/Brake Lever - Right, 12-Speed, Black Apparel Brand_Supacaz Always check with your rimFeaturing Servo Wave Action brake technology, the Shimano Dura Ace ST R9270 brake lever delivers modulation and control like never before. Wireless shifting keeps your bike looking clean while offering the fastest, most precise gear changes available. All of this resides in a dual control lever that employs the most advanced materials to offer lightweight and refined ergonomics that provide comfort and control for the most demanding conditions. The