Shimano Ultegra ST-R8170F Di2 Left/Front Lever with BR-R8170 Hydraulic Flat Mount Disc Brake Caliper Shoe Brand_Louis Garneau Closure: Side mounted L6 BOA®

Closure: Side mounted L6 BOA® Push/Pull lacing system with power strap in the forefoot

and stretchy

The Alpenchallenge AC01 can be augmented with these City Kit Lights

XDR™ or SRAM/Shimano driver bodies

8 Stems are fully forged 6061-T6 aluminum stems that have a 4-bolt handlebar clamp

Shimano Ultegra ST-R8170F Di2 Left/Front Lever with BR-R8170 Hydraulic Flat Mount Disc Brake Caliper Shoe Brand_Louis Garneau Closure: Side mounted L6 BOA®Your 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