Shimano Black Shimano Dura-Ace Di2 R9250 Shadow rear derailleur 2025

The DURA-ACE RD-R9250 integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length that is compatible with 28-34T low sprockets brings new versatility to the world's best road component group.

• Our fastest ever rear shifting, 58% faster than RD-R9150
• LED status indicator
• Battery indicator
• Pairing
• Adjust mode, etc.
• Wider range capacity
• Max. low sprocket: 34T
• CFRP rear derailleur plate
• Rear speeds: 12
• SHIMANO SHADOW RD
• Mount: Direct attachment (conventional): Direct mount
• Max. front difference: 16T
• Total capacity: 37T
• Low sprocket: Max.: 34T, Min.: 30T
• Top sprocket: Max.: 11T, Min.: 11T
• Fluoric coated link bushings: 4
• Pulley: Guide pulley bearing
• Tension pulley bearing
• Teeth: 11
• Sunken type pulley screw
• B-axle: Hollow axle
• Di2 connectivity wired
• Di2 shifting
• Bluetooth® LE custom (*1)|Adjust mode information
• Bluetooth® LE custom (*1)|Di2 battery level
• Bluetooth® LE custom (*1)|Gear position
• Bluetooth® LE custom (*1)|SHIMANO E-BIKE SYSTEMS data items (*3)
• Bluetooth® LE custom (*1)|Compatible with E-TUBE RIDE
• Bluetooth® LE custom (*1)|Compatible with E-TUBE PROJECT
• ANT private (*2)|Adjust mode information
• ANT private (*2)|Di2 battery level
• ANT private (*2)|Gear position
• ANT private (*2)|SHIMANO E-BIKE SYSTEMS data items (*3)
• Firmware update by E-TUBE PROJECT
• SD300 port (pcs): 1
• LED for system status
• Charging cable: EW-EC300
• Average weight: 215