Shimano Dura Ace Di2 TT Extension Shifters SW-7971

SKU: 4032428969_2

Brand: Shimano

Product Description

Designed exclusively for triathletes and time trialists, the new system eliminates the need to change hand positions during shifting. Riders can change gears at the base bar (ST-7971) as well as the bar extensions (SW-7971) because the system in...