The pinnacle of electronic road shifting, the Shimano DURA-ACE RD-R9250 delivers the fastest, most precise gear changes ever achieved in a road derailleur — 58% quicker than its predecessor — while integrating wireless connectivity and on-board charging into a single, featherlight 215g package.

Highlights

  • 58% faster shifting than previous-generation DURA-ACE Di2
  • Integrated D-FLY unit with Bluetooth and ANT+ wireless connectivity
  • Built-in charging port (EW-EC300 compatible) — no separate junction box needed
  • SHIMANO SHADOW RD low-profile design for silent, snag-free performance
  • Single cage length handles 11-34T cassettes — the widest DURA-ACE range ever
  • 37T total capacity with up to 16T chainring spread
  • Aluminium and CFRP (carbon fibre reinforced polymer) construction at just 215g
  • Semi-wireless architecture: shift signals travel wirelessly from levers to derailleur
  • Crash-mode recovery — shifts through the full cassette to self-correct after impact
  • Compatible with direct-mount and conventional hanger fitting

Di2 Intelligence & Wireless Technology

The RD-R9250 is the nerve centre of the DURA-ACE R9200 Di2 groupset. It houses the wireless D-FLY transmitter, enabling Bluetooth and ANT+ pairing with compatible cycling computers, power meters, and the Shimano E-TUBE PROJECT app for custom shift programming. The integrated EW-SD300 port and on-board charging port mean cleaner routing with fewer components — no separate junction box or E-tube hub required.

Shadow RD Design & Shifting Precision

Shimano's SHADOW RD low-profile construction keeps the derailleur body tucked close to the cassette, minimising chain slap noise and reducing the risk of contact with the chain stay on rough terrain. Combined with the precision of 12-speed Di2 actuation, every shift is immediate and repeatable under load — whether sprinting, climbing, or navigating technical descents.

Compatibility & Fit

Designed for DURA-ACE R9200 and Ultegra R8100 12-speed Di2 groupsets. Compatible with CS-R9200 and CS-R8100 cassettes (11-28T, 11-30T, 11-34T). Works with ST-R9250, ST-R9270, ST-R9160, ST-R9180, ST-R8150, ST-R8170, and ST-R8060 Di2 shifters. Requires a BT-DN300 internal Di2 battery and EW-EC300 charger. Accepts both direct-mount and conventional derailleur hanger fitments.

Shimano DURA-ACE components are covered by a 3-year warranty against defects in materials and workmanship from the date of original retail purchase in Australia. This warranty does not cover normal wear, crash damage, or improper installation. For warranty support, return the item to Tune Cycles.

  • 12-speed DURA-ACE Di2 electronic rear derailleur
  • Semi-wireless Di2 system — wireless shift signals, wired battery connection
  • Integrated D-FLY Bluetooth and ANT+ wireless unit
  • Built-in EW-EC300 charging port and EW-SD300 connection port
  • SHIMANO SHADOW RD low-profile, single-tension design
  • 58% faster shifting than previous DURA-ACE Di2 generation
  • Supports 11-34T maximum sprocket (37T total capacity)
  • CFRP and aluminium construction — 215g
  • Direct-mount and conventional hanger compatible
  • Crash-mode recovery via full-cassette sweep
  • Programmable via Shimano E-TUBE PROJECT app
  • Status LED and settings button on-board
SpecificationDetail
ModelRD-R9250
SeriesDURA-ACE R9200
Speed12-speed
Weight215g
Max Low Sprocket34T
Min Top Sprocket11T
Total Capacity37T
Max Chainring Difference16T
Cage LengthMedium (single option)
MaterialAluminium / CFRP
WirelessBluetooth & ANT+ (D-FLY)
Ports1× EW-SD300, 1× EW-EC300 charging
Compatible CassettesCS-R9200, CS-R8100
Compatible ShiftersST-R9250, ST-R9270, ST-R9160, ST-R9180, ST-R8150, ST-R8170, ST-R8060
Required BatteryBT-DN300
MountDirect mount or conventional
ColourBlack
SKU SHM-IRDR9250A
Brand Shimano

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