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Ships within 48 hours · Estimated delivery Sep 7 - Sep 12
All metal internal construction for long life
you can always head out for a ride solo to clear your head
Braking power adjusted for entry-level riders
The Mini Chain Tool securely locks the chain into place at just the right spot
Shimano Ultegra Di2 ST-R8170 12 Speed Shifters Size:Right All metal internal construction forWhen 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