Shimano Satellite Shifter Extension Bar SW-RS801-E Small Size for Big Performance The SW-RS801-E provides fast shifting for Shimano 12-speed road bike handles. Compatible Models: ST-R8150, ST-R8170, ST-R9250, ST-R9270, 12S Di2 drop handle; Extension switch option with satellite shifter port when installed on extension bar *Not compatible with ST-R9180, 105, Di2: ST-R7170. Features Compact satellite shifter allows you to customize multiple shift points anywhere on the handlebar Designed to attach directly to handlebars Cable length 740mm for TT Extension Bar