Shimano GRX-825 12-Speed Di2 Right Rear STI Lever

The STI Shimano GRX-825 12s Di2 right lever is the wireless electronic control for the rear derailleur of a GRX Di2 12-speed drivetrain, with an integrated hydraulic hose for the disc brake. It is supplied on its own: choose the right side if you need the rear derailleur control, and remember that the left lever is purchased separately.

It weighs 207 g per lever and fits clamp diameters from 23.8 to 31.8 mm, so check your handlebar before fitting it. The two CR1632 batteries are included and last approximately 3–4 years. The lever connects to a SD300-compatible satellite port, with no cables to the handlebar. For braking, it uses Shimano mineral oil, and the recommended calliper is the BR-RX820.

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.