SW-R9160 Dura-Ace Di2 Shift Switch Kid's this comfortable bike seat is

this comfortable bike seat is finished with steel rivets and a steel undercarriage

The Shimano Ultegra BR-R8100 series caliper brakes offer a clear contact feeling while balancing rigidity

Unstrung balance (cm) : 28

The extra-long 14" handle is made from chromoly steel for superior strength and durability

SW-R9160 Dura-Ace Di2 Shift Switch Kid's this comfortable bike seat isThe SW R9160 remote TT Triathlon shifter allows for shifting when using TT aero bars. It is mounted at the end of the aero bar extension. These shifters are 12 speed compatible, if you update them to firmware version 3. 3. 0 or newer. In order to update these shifters, either connect them to the SM PCE02 or SM PCE1 on their own, or connect them to an 11 speed Di2 bike and use the SM BCR2 charger to run the firmware update. No wireless These shifters