The Shimano Ultegra RD‑R8150 Di2 rear derailleur is a top‑normal, medium‑cage electronic derailleur featuring Shimano’s low‑profile Shadow design and Direct Attach compatibility. It delivers ultra‑fast, precise 12‑speed shifting with LED status and battery indicators, and includes the TL‑EW300 cable connection tool for easy installation.

• 12‑speed Ultegra Di2 (RD‑R8150), medium cage
• Shadow RD design for minimal chainstay clearance
• Direct Attach compatible (conventional mount)
• Compatible sprockets 28–34 T; total capacity 39 T; max front difference 16 T
• LED status indicator and battery level indicator
• Includes TL‑EW300 Di2 cable connection tool