Shimano Ultegra R8150 2x12-Speed Di2 Electronic Rear Derailleur

The Shimano Ultegra R8150 Di2 rear derailleur is a 12-speed electronic rear derailleur for road bikes. It suits you if you already have a 12-speed Ultegra or Dura-Ace Di2 groupset.

• 12-speed electronic rear derailleur for shifting with a simple touch
• Takes sprockets up to 34T for easier gearing on climbs
• A charged battery lasts approximately 1000 km, then recharges via the rear derailleur
• Lightweight at just 262 g with a medium cage
• Only compatible with 12-speed Ultegra and Dura-Ace Di2 groupsets: check yours

Technical specifications

• Model: RD-R8150 (Ultegra R8150 Di2)
• Derailleur type: Electronic
• Speed: 12
• Maximum sprocket: 34T
• Cage: Medium
• Weight: 262 g
• Charging: Via the rear derailleur with a charging cable
• Battery range: Approximately 1000 km with a charged battery
• Compatibility: Only with 12-speed Ultegra and Dura-Ace Di2 groupsets
• Colour: Black

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.