Shimano Ultegra Di2 ST-R8170 12 Speed Shifters Size:Left The Ergopower controls also offer

The Ergopower controls also offer the cyclist total control over how the transmission works thanks to the MODE button (found immediately behind the downshift lever on both right and left-hand controls)

the Hellbender is the only way to make your Cane Creek headset even better

brake lever and bigger gear levers

Shimano SPD-SL

Shimano Ultegra Di2 ST-R8170 12 Speed Shifters Size:Left The Ergopower controls also offerWhen developing the Ultegra R8100 series, Shimano took a holistic, performance oriented approach, because great speed means great responsibility. Faster than ever, the Shimano Ultegra Di2 ST R8170 12 Speed Shifters deliver unparalleled control and comfort anytime, anywhere, whether in an everyman race, on the hunt for a personal best, or on a companionable ride. As with Dura Ace R9200, Hyperglide+ makes its way into Ultegra's components, and its Di2