Shimano Ultegra ST-R8170F Di2 Right/Rear Lever with BR-R8170 Hydraulic Flat Mount Disc Brake Caliper cycling socks Shake bottle to activate formula

Shake bottle to activate formula

Its single LED design provides up to an impressive 500 lumens of output and eight output modes—including a Daytime Flash mode

It drives out moisture and leaves a protective anti-corrosive layer on your bike's frame

The large contact area is perfect for riders looking for a comfortable width that offers security but also a surface contact-to-weight ratio which remains best in class for trail pedals

You can set up wheel size in our Garmin Connect™ online community or self-calibrate with an Edge® cycling computer or compatible Garmin device

Shimano Ultegra ST-R8170F Di2 Right/Rear Lever with BR-R8170 Hydraulic Flat Mount Disc Brake Caliper cycling socks Shake bottle to activate formulaYour 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