Shimano Dura Ace 7900 RD-7900 Rear Derailleur 10 Speed Short Cage

The Shimano Dura-Ace RD-7900 rear derailleur is a 10-speed, short-cage component designed for road bikes, featuring a lightweight, stiff construction with a carbon fiber pulley cage. Released in 2008, it is compatible with Shimano 10-speed systems, supports cassettes up to 28 teeth, and is designed to deliver smooth, quiet shifting, weighing approximately grams.

Key Features and Specifications:

• Material: Carbon fiber pulley cage and P-knuckle, with aluminum alloy components for high rigidity and reduced weight.

• Compatibility: 10-speed Shimano road drivetrains.

• Capacity: Short cage (SS) design, with a total chain wrap capacity of 32 teeth, accommodating up to 28-tooth cogs.

• Design: Features a heavier return spring for faster, more precise shifts.

• Weight: Approximately 166g.

• Performance: Known for very quiet and smooth operation, with a "near-silent" shift.