SHIMANO RD-R9250 (DURA-ACE) | Shimano's fastest-shifting 12-speed Di2 rear derailleur in history

A split-second shift can decide the race. DURA-ACE has been refined for precisely that.

The "RD-R9250" from the SHIMANO DURA-ACE R9200 series is a 12-speed rear derailleur that forms the core of the wireless Di2 system.

It achieves approximately 58% faster shifting performance compared to the conventional RD-R9150, making it Shimano's fastest rear shifting in history. It responds instantly to attacks, sprints, and sudden changes in gradient during a race, transmitting the rider's intentions directly to the drivetrain.

Furthermore, the wireless unit, charging port, and switch are integrated into a compact body. It supports Bluetooth® LE and ANT communication, allowing for connectivity with E-TUBE PROJECT and cycling computers. This component, which can be called the brain of DURA-ACE, combines high shifting performance with excellent system integration.

Features

• SHIMANO DURA-ACE R9200 series 12-speed Di2 rear derailleur
• Shimano's fastest shifting performance in history, approx. 58% faster than RD-R9150
• Compact design integrating wireless unit, charging port, and switch
• Supports Bluetooth® LE and ANT communication
• Various customizations possible with E-TUBE PROJECT
• Compatible with E-TUBE RIDE for linking with ride data
• LED indicator for checking battery level and pairing status
• Supports wide gear range up to 34T
• High stability with SHIMANO SHADOW RD design
• Lightweight due to CFRP rear derailleur plate
• Bearing adopted for guide and tension pulleys
• Widely applicable from road racing to long rides

SPEC

• Series: DURA-ACE R9200
• Model: RD-R9250
• Compatible speeds: 12-speed
• Type: Di2 electronic rear derailleur
• Mount: Braze-on / Direct mount compatible
• Max front difference: 16T
• Total capacity: 37T
• Compatible low sprocket max: 34T
• Compatible low sprocket min: 30T
• Compatible top sprocket: 11T
• Pulley teeth: 11T
• Communication standards: Bluetooth® LE / ANT
• System status LED included
• Charging port: 1
• Compatible charging cable: EW-EC300
• Average weight: Approx. 215g

This is one of the components in the R9200 generation where you can most easily feel the evolution.

The shifting speed is truly fast, and the response, especially under high load or when riding at race pace, is overwhelming. There is almost no perceptible time lag in gear changes, allowing for smooth shifting without interrupting pedaling.

Furthermore, system integration via Bluetooth® and ANT compatibility is a major attraction. Connecting to a cycling computer and changing settings with E-TUBE can be done easily.

It is a core DURA-ACE component, essential for building the finest road bike.