Is the Shimano Ultegra RD-R8150 Di2 the Right Rear Derailleur for Your Build? The Shimano Ultegra RD-R8150 brings the same generational leap as the Dura-Ace RD-R9250 to the Ultegra tier, with 58% faster shifting than the previous generation, a carbon cage, and the fully integrated D-FLY wireless hub that consolidates the charging port, Bluetooth LE and ANT+ connectivity, LED status indicator, and function button directly into the derailleur body. No separate junction box is needed. The compact Shadow RD low-profile design reduces the derailleur's footprint and exposure, and a single cage length covers 11-28t, 11-30t, and 11-34t cassettes in one derailleur. Part of the Shimano Ultegra R8100 semi-wireless Di2 system. The derailleur connects to the BT-DN300 battery via EW-SD300 E-Tube wire while shift commands arrive wirelessly from the ST-R8170 levers. Full tuning and synchronized shifting configuration via E-Tube Project app over Bluetooth or ANT+. Compatible with 12-speed Ultegra Di2 and Dura-Ace R9200 Di2. Not compatible with 11-speed Di2 or mechanical.
Is the Shimano Ultegra RD-R8150 Di2 the Right Rear Derailleur for Your Build? The Shimano Ultegra RD-R8150 brings the same generational leap as the Dura-Ace RD-R9250 to the Ultegra tier, with 58% faster shifting than the previous generation, a carbon cage, and the fully integrated D-FLY wireless hub that consolidates the charging port, Bluetooth LE and ANT+ connectivity, LED status indicator, and function button directly into the derailleur body. No separate junction box is needed. The compact Shadow RD low-profile design reduces the derailleur's footprint and exposure, and a single cage length covers 11-28t, 11-30t, and 11-34t cassettes in one derailleur. Part of the Shimano Ultegra R8100 semi-wireless Di2 system. The derailleur connects to the BT-DN300 battery via EW-SD300 E-Tube wire while shift commands arrive wirelessly from the ST-R8170 levers. Full tuning and synchronized shifting configuration via E-Tube Project app over Bluetooth or ANT+. Compatible with 12-speed Ultegra Di2 and Dura-Ace R9200 Di2. Not compatible with 11-speed Di2 or mechanical.
Shimano RD-R8150 Rear Derailleur Ultegra Di2 12-Speed
Is the Shimano Ultegra RD-R8150 Di2 the Right Rear Derailleur for Your Build? The Shimano Ultegra RD-R8150 brings the same generational leap as the Dura-Ace RD-R9250 to the Ultegra tier, with 58% faster shifting than the previous generation, a carbon cage, and the fully integrated D-FLY wireless hub that consolidates the charging port, Bluetooth LE and ANT+ connectivity, LED status indicator, and function button directly into the derailleur body. No separate junction box is needed. The compact Shadow RD low-profile design reduces the derailleur's footprint and exposure, and a single cage length covers 11-28t, 11-30t, and 11-34t cassettes in one derailleur. Part of the Shimano Ultegra R8100 semi-wireless Di2 system. The derailleur connects to the BT-DN300 battery via EW-SD300 E-Tube wire while shift commands arrive wirelessly from the ST-R8170 levers. Full tuning and synchronized shifting configuration via E-Tube Project app over Bluetooth or ANT+. Compatible with 12-speed Ultegra Di2 and Dura-Ace R9200 Di2. Not compatible with 11-speed Di2 or mechanical.
Is the Shimano Ultegra RD-R8150 Di2 the Right Rear Derailleur for Your Build? The Shimano Ultegra RD-R8150 brings the same generational leap as the Dura-Ace RD-R9250 to the Ultegra tier, with 58% faster shifting than the previous generation, a carbon cage, and the fully integrated D-FLY wireless hub that consolidates the charging port, Bluetooth LE and ANT+ connectivity, LED status indicator, and function button directly into the derailleur body. No separate junction box is needed. The compact Shadow RD low-profile design reduces the derailleur's footprint and exposure, and a single cage length covers 11-28t, 11-30t, and 11-34t cassettes in one derailleur. Part of the Shimano Ultegra R8100 semi-wireless Di2 system. The derailleur connects to the BT-DN300 battery via EW-SD300 E-Tube wire while shift commands arrive wirelessly from the ST-R8170 levers. Full tuning and synchronized shifting configuration via E-Tube Project app over Bluetooth or ANT+. Compatible with 12-speed Ultegra Di2 and Dura-Ace R9200 Di2. Not compatible with 11-speed Di2 or mechanical.
in 12 offers
The lowest price for Shimano RD-R8150 Rear Derailleur Ultegra Di2 12-Speed right now is $429.00 at on9bike.com, compared across 10 retailers.
The all-time low was $429.00 on 25 Oct 2026. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 3 Nov 2026.
Last updated at 03/11/2026 05:32:08
Shimano Ultegra 12SPD Shadow Rear Derailleur RD-R8150
Delivery $23.20
Shimano Ultegra Di2 RD-R8150 12S Shadow RD Rear Derailleur READ
Delivery $24.96
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano RD-R8150 Ultegra Di2 12Spd Rear Derailleur
Free delivery
Shimano Ultegra Rear Derailleur (Di2 spec.) RD-R8150 12-speed Direct mount compatible
Free delivery
Shimano RD-R8150 Ultegra Di2 2x12s Rear Derailleur in Black
Delivery between Fri – Mon $15
Shimano RD-R8150 Rear Derailleur Ultegra Di2 12-Speed
Free delivery
Shimano Ultegra Di2 12-Speed RD-R8150 Rear Derailleur
Free delivery between 5–11 Nov
Shimano, Ultegra Di2 RD-R8150, Rear Derailleur, Speed: 12, Cage: GS, Black, IRDR8150F
Delivery $65.52
Shimano Ultegra RD-R8150 12-Speed Di2 Rear Derailleur
Delivery between 5–13 Nov $78.72
Shimano ULTEGRA Rear DERAIL R8150 Di2 12-Speed TOP Normal Shadow Design
Delivery $28.62
| Brand | Shimano |
Shimano Ultegra 12SPD Shadow Rear Derailleur RD-R8150
Delivery $23.20
Shimano Ultegra Di2 RD-R8150 12S Shadow RD Rear Derailleur READ
Delivery $24.96
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano RD-R8150 Ultegra Di2 12Spd Rear Derailleur
Free delivery
Shimano Ultegra Rear Derailleur (Di2 spec.) RD-R8150 12-speed Direct mount compatible
Free delivery
Shimano RD-R8150 Ultegra Di2 2x12s Rear Derailleur in Black
Delivery between Fri – Mon $15
| Brand | Shimano |
