The Shimano ST-R8170 Di2 Lever with BR-R8170 Disc Brake Caliper delivers refined control and performance for modern road riding. Featuring wireless Di2 electronic shifting, the ST-R8170 lever offers crisp, precise gear changes with an ergonomic shape designed for comfort and responsiveness. Paired with the BR-R8170 hydraulic disc brake caliper, it provides powerful, consistent braking in all conditions. Whether you're assembling a front or rear setup, this combination ensures smooth integration, reliability, and top-tier performance—perfect for serious road cyclists and racers alike.