Product Details
With Shimano's fastest, most accurate shifting, the new 12-speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28-34T low sprockets
Features:
Shimano's fastest ever rear shifting, 58% faster than RD-R9150
Compact design includes an integrated wireless unit, charger, and switch
LED status indicator
Battery indicator
Wider range capacity
Specifications:
Rear speeds: 12
RD construction: SHIMANO SHADOW RD
Mount: Direct attachment (conventional), Direct mount
Max. front difference: 16T
Total capacity: 39T
Low sprocket: 30-34T
Top sprocket: 11T
Fluoric coated link bushings: 4
Pulley:
Guide/Tension pulley bearing
Teeth: 11
Sunken type pulley screw
B-axle: Hollow axle
B-axle 2: Hollow axle
Di2 connectivity wired shifting: ✔
Di2 connectivity wireless shifting: ✔
Bluetooth® LE custom |Adjust mode information: ✔
Bluetooth® LE custom |Di2 battery level: ✔
Bluetooth® LE custom |Gear position: ✔
Bluetooth® LE custom |SHIMANO E-BIKE SYSTEMS data items (*3): ✔
Bluetooth® LE custom |Compatible with E-TUBE RIDE: ✔
Bluetooth® LE custom |Compatible with E-TUBE PROJECT: ✔
ANT private |Adjust mode information: ✔
ANT private |Di2 battery level: ✔
ANT private |Gear position: ✔
ANT private |SHIMANO E-BIKE SYSTEMS data items (*3): ✔
Firmware update by E-TUBE PROJECT: ✔
SD50 port (pcs): 0
SD300 port (pcs): 1
SD50 connector (pcs): 0
SD300 connector (pcs): 0
LED for system status: ✔
Charging cable: EW-EC300
Average weight: 262g
What Sets Alchemy Apart
The best pre-owned bikes
When you buy a pre-owned bike from Alchemy Cycle Trader, you’re getting more than just a great deal. Every bike is roadworthy certified, comes with a 3-month warranty, and includes your first service free - so you can ride away with complete confidence.
Buy with confidence
In-house Active Thermography Carbon Fibre Testing for extra peace of mind on pre-owned bikes.
Learn more about our carbon testing.
Expert Servicing & Ongoing Support
Our professional workshop team is here to keep your bike running at its best long after you’ve taken it home. From routine servicing to performance tuning, our qualified mechanics ensure your ride stays smooth, safe, and ready for every adventure. Whether it’s your first free service or future maintenance, you can count on Alchemy Cycle Trader for trusted support and expert care. Learn more about our workshop services.
