Shimano Ultegra ST-R8170A Di2 Shift/Brake Lever with BR-R8170 Hydraulic Disc Brake Caliper - Right/Rear, 12-Speed, Flat Mount, Black Swim Brand_Zone3 adventure cyclists & anyone else

adventure cyclists & anyone else who wears their cycling shoes for long periods of time

external seals

0 is our fastest bike ever—4% faster than its predecessor

Advanced knob design creates extra gripping edges and reinforced side tread for secure cornering

Medium leg provides the perfect amount of coverage

Shimano Ultegra ST-R8170A Di2 Shift/Brake Lever with BR-R8170 Hydraulic Disc Brake Caliper - Right/Rear, 12-Speed, Flat Mount, Black Swim Brand_Zone3 adventure cyclists & anyone elseYour time on the bike is precious, let Shimano make it even better. Ultegra ST R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO WAVE technology. The Di2 platform untethers the shifters while delivering fast and reliable wireless shifting. The BR R8170 hydraulic 2 piston disc brake caliper brings a new level of control to the road cycling world with improved modulation and a quicker initial