Shimano GRX 12 Speed Disc Brake Assembled Set - ST-RX825 - Right(Rear)Experience rapid, wireless shifting on gravel and mixed terrain with the Shimano GRX Di2 12 speed Dual Control Lever. Its ergonomic design features enhanced security and control thanks to raised hoods, a textured surface, and a non slip brake lever coating. The optimized hood bracket integrates seamlessly with flared handlebars, maintaining the dedicated gravel third button. Customize your cockpit with three optional satellite shifters and Shimano