ST-R8170, Ultegra, Wireless Position:Rear 15mm and 1" sockets (The

15mm and 1" sockets (The 1" socket fits various Park Tool Freewheel

126 links + missing link

enabling precise positioning of arm cups

and mounting bolts

ST-R8170, Ultegra, Wireless Position:Rear 15mm and 1" sockets (TheShimano's new ULTEGRA ST R8170 brake levers bring enhanced modulation and control to every ride by employing Shimano's proven SERVO WAVE technology. The all new Di2 platform, used on both DURA ACE and ULTEGRA, untethers the shifters while delivering our fastest, most reliable wireless shifting. Your time on the bike is precious, let Shimano make it even better. BENEFIT Clean Cockpit: Wireless connection enhances the aerodynamic effect and easy