Shimano Ultegra Di2 RD-R8150 12-Speed Rear Derailleur

The new Shimano ULTEGRA R8150 12-speed is the fastest and most precise rear derailleur on the market in a more affordable version

With the fastest and most precise derailleur on the market, the new ULTEGRA R8150 12-speed rear derailleur is more versatile than ever, thanks to a single cage length option compatible with minimum sprockets of 28-34D. The compact design includes an integrated wireless unit, a charger and a switch.

Features

• Model: RD-R8150
• Series: ULTEGRA R8100 Series
• Actual weight: 260 g
• Total capacity: 39D
• Fluorine-coated bushings: 4
• Maximum sprocket: 34D
• Minimum sprocket: 28D
• Maximum front difference: 16D
• Pulley teeth: 11
• 2X12V

Technologies

E-TUBE Technology
E-TUBE is the Shimano "service" that uses websites or apps to maximise cycling enjoyment by connecting riders, bikes and Shimano.

Shimano Shadow RD
The rear derailleur with the new SHIMANO SHADOW RD mechanism is designed for a more aggressive riding style. Its low-profile design offers numerous advantages. Thanks to its low profile and unique tensioning structure, the derailleur does not come into contact with the chain on very rough terrain. The result is highly efficient and very quiet operation.

Direct Mount Rear Derailleur
Rear wheels are easier to remove with a mounting option for SHIMANO SHADOW RD and SHIMANO SHADOW RD+ rear derailleurs. Direct mounting has been designed for a wide range of modern frames with large-section chainstays, particularly mountain bikes with thru-axle dropouts. It offers great flexibility in frame design.

The product may be shipped in an aftermarket box or OEM packaging depending on supply

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.