These ST-R9150 Dual Control Levers are the DURA-ACE R9150 rim-brake levers.
They weigh about 115g each and both levers have two E-tube ports and one remote sprint shifter port. If you're looking for the Hydraulic Disc levers, visit the ST-R9170 hydraulic disc lever page.
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Just like the ST-9070, ST-R8050, ST-R8070, ST-R9170 and GRX levers, these ST-R9150s have a hidden button on top of the hoods.
I wrote an article on setting up the Di2 shifter hood buttons, so have a look if you haven't set yours up yet.
Modern Di2 shift levers have buttons on top of the hoods, but unless you're on 12-speed Di2, their default function only works with a wireless unit or d-fly. Learn how to set these buttons to shift derailleurs.
Learn how to install Di2 drop bar levers commonly used on Di2 road bikes or Di2 gravel bikes. I'll walk you through the process and give you some useful tips.
Do you have small hands? Or extra large hands? Read this page to figure out how to change your Shimano Di2 shift lever (or shifter) reach.
Below is an overview of all known firmware updates for this component. The changelog texts are Shimano's, and quite often they're a bit cryptic - sorry!
3.3.0
Changes due to the release of firmware for related units. (No change for the use of ST-R9150)
3.2.1
-Added interchangeability between SHIMANO STEPS with Road components.- Adopted models （ST-R8070/ST-RX815）
3.1.0
Additional ANT function for D-FLY channel switch setting (cycle computer setting)
3.0.1
Firmware uploaded
