Shimano ST-R8150 Ultegra Di2 STI for drop bar without E-tube wires, left hand Bontrager Designed to integrate seamlessly with

Designed to integrate seamlessly with compatible Giant and Liv helmets

and disc brakes give you added control on rugged roads or dirt

All Weather Spray is a lubricant with revolutionary micro-additives for chains

all-rounder feel that blends confident rider positioning with agile road handling

Adjustable visor with clear lens and room underneath for your normal glasses

Shimano ST-R8150 Ultegra Di2 STI for drop bar without E-tube wires, left hand Bontrager Designed to integrate seamlessly withWith Di2 technology shifting is easy and precise just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gearFull and semi synchronized shifting programable, Synchro shift compatible meaning a single shifter can control both front and rear shifting which can be fully custom tuned to your riding preferences. Semi synchronized shifting means when a front shift is made the rear