Shimano Ultegra RD-R8150 Di2 12-Speed Rear Derailleur 28-34T Road Bike IRDR8150F
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About this product
The Shimano Ultegra RD-R8150 Di2 12-Speed Rear Derailleur is designed for road bikes, compatible with 28-34T cassettes. This electronic derailleur, weighing 262g, is constructed from aluminum, stainless steel, and glass fiber reinforced polymer. It features a hanger mounting type and is a key component for 12-speed Shimano Ultegra Di2 groupsets, providing fast and accurate shifts. This Japanese-made part is essential for a modern, high-performance road setup.
Our take
For road cyclists moving to or upgrading their Di2 system, the Shimano Ultegra RD-R8150 12-speed rear derailleur is a robust and reliable choice. It's built for crisp, electronic shifting, which is a significant performance advantage. The material mix of aluminum, stainless steel, and glass fiber reinforced polymer balances durability and weight effectively, coming in at 262g. With compatibility for 28-34T cassettes, it offers a good range for varied terrain. As a Shimano Ultegra component, you can expect excellent quality, though its price reflects its advanced electronic nature.
Pros & Cons
Pros
- Shimano Ultegra 12-speed Di2
- Electronic shifting for precision
- Supports 28-34T cassette range
- Durable multi-material construction
Cons
- Specific to 12-speed Di2 systems
- Higher price point for electronic component
Specifications
- Compatible Brand Shimano
- Brand Shimano
- Color Black
- Model Shimano Ultegra
- Compatible Model Shimano Ultegra
- MPN IRDR8150A
Show all 12 specifications
- Material
- Aluminum, Stainless Steel, Glass Fiber Reinforced Polymer (CFRP)
- Mounting Type
- Hanger
- Number of Speeds
- 12 Speed
- Country of Origin
- Japan
- Item Weight
- 262 g / 9.24 oz
- Part Type
- Rear Derailleur
