Shimano Dura-Ace Di2 RD-R9250 rear derailleur

An even better switching performance

With the fastest gear changes in the largest DURA-ACE gear ratio to date, the RD-R9250 rear derailleur from Shimano opens up chances of victory or opportunities for personal bests.

The DURA-ACE RD-R9250 rear derailleur has an integrated charging connection and a unit for wireless signal transmission, which enables super-fast and precise switching operations. With just one cage length, the rear derailleur shifts on cassettes from 11-28 to 11-34 teeth, further increasing the versatility of the world's best racing bike component group.

Highlights

• Fastest rear derailleur function ever, 58% faster than FD-R9150
• Compact design with integrated unit for wireless signal transmission, charger and switch
• LED status display (battery indicator, pairing, setting mode, etc.)
• Larger gear range (largest sprocket: 34 teeth)
• CFRP rear derailleur cage
• Top normal execution

specification

Technologies used

In this chapter we explain the technologies that the manufacturer uses for this product.

Shimano Shadow RD
With its sophisticated technology, the Shimano SHadwo RD rear derailleur is especially suitable for a more aggressive driving style. The extremely minimized profile brings a number of advances with it. Due to its flat design and the construction based on single preload, the rear derailleur does not hit the chainstay even under the harshest conditions. The circuit works cleanly and quietly.

Direct Mount Rear Derailleur
With a mounting option for Shimano Shadow RD and Shimano Shadow RD +, rear wheels are easier to remove. The direct mount function is designed for a wide range of modern frames with large chainstays, especially mountain bikes with thru-axle dropouts. Allows a flexible frame construction No special tool requirements (fastening screw M10x1, without E-clip) Easier to install rear wheel.

E-Tube Project - settings that can be adjusted via the app
The E-Tube Project application for mobile devices developed by Shimano has functions for customizing the bike, updating the firmware and for maintenance using a wireless connection to the bike. More detailed maintenance of the bike is possible by connecting the bike to the E-Tube Project for Windows V4 application using a cable.

scope of delivery

• 1 x Shimano Dura-Ace Di2 RD-R9250 rear derailleur (see item description for details)