Shimano Dura-Ace R9250 Rear Derailleur Di2 12 Speed

Shimano DURA-ACE RD-R9250 Rear Derailleur

The DURA-ACE RD-R9250 combines ultra-fast shifting, wireless connectivity, and lightweight, durable construction for top-tier road performance.

Key Features:

• 58% faster shifting than RD-R9150
• Single cage compatible with 28–34T low sprockets, 37T total capacity
• CFRP rear plate and hollow B-axles for stiffness and weight savings
• Fluoric-coated link bushings and high-quality pulley bearings for smooth, quiet operation
• Di2 wired/wireless with Bluetooth® LE and ANT+ connectivity
• LED system indicator and firmware updates via E-TUBE PROJECT
• Direct mount compatible

Specifications:

• Speeds: 12
• Max front difference: 16T
• Pulley teeth: 11
• Weight: 215g (without bracket)
• Compatible with Shimano E-TUBE RIDE/PROJECT apps

Benefits:

• Fast, precise shifting under load
• Wider gearing range for versatile racing or training
• Lightweight and durable for consistent performance
• Full app connectivity for monitoring and customization