NEW Shimano GRX Di2 12-Speed: Details, Shifting, & Impressions

shimano grx di2 12 speed review
GRX Di2 goes semi-wireless

“Gravel cycling is rooted in its simplicity, inclusivity, and curiosity. Everyone from first-timers to grizzled veterans counts on Shimano GRX, the industry’s first gravel-specific groupset, for smooth shifting, reliable braking, and exceptional gravel comfort.” – https://bike.shimano.com

shimano grx di2 12 speed review
The new brake differs slightly from the 11 speed variant

“SHIMANO GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world. It isn’t a reworked set of road components. It represents a ground up look at how cyclists want to explore their world. SHIMANO GRX helps you eliminate excuses, instead urging you to try that rough sidetrack or ride that little bit longer. It offers you the option to Explore Beyond.”

Shimano GRX Di2 12-Speed Video

Alternative Video Link for those reading via email subscription

In this video, JOM of the Gravel Cyclist crew covers the key details of Shimano’s new to market 12-Speed GRX Di2 semi-wireless shifting and braking system. Additionally, he provides shifting demonstrations, and first impressions, all of which will lead to a long-term review, coming later.

shimano grx di2 12 speed review
Three buttons for each shifter, and an additional shifter port

Reminder: ALWAYS BE A STEWARD FOR GRAVEL CYCLING: Respect the roads, respect the locals, respect the land, respect your fellow cyclists.

12 speed grx di2 review
Details of the new GRX 12 Speed Di2 Shifters
12 speed grx di2 review
Semi-wireless configuration
12 speed grx di2 review
New Firmware Available on 05/23/2024 – Front Shift Next
12 speed grx di2 review
System Pricing
12 speed grx di2 review
System Components

Additional Photos

12 speed grx di2 review
Left: 11 Speed GRX Di2, Right: 12 Speed GRX Di2
12 speed grx di2 review
Closest to camera, 11 speed Di2 Shifter
12 speed grx di2 review
Another look at the revised designed for GRX Di2 semi-wireless
shimano grx di2 12 speed review
Revised 12 Speed GRX Di2 Rear Derailleur
shimano grx di2 12 speed review
11T, the smallest cog this derailleur can handle, 36T, the biggest
shimano grx di2 12 speed review
The semi-wireless system connects both derailleurs to an internal seatpost battery
shimano grx di2 12 speed review
GRX Rear Derailleur becomes the brain of the operation, note the button
12 speed grx di2 review
Another comparative view of the Shifters
shimano grx di2 12 speed review
Demonstrating Sprint Shifters
shimano grx di2 12 speed review
Clutch Switch
shimano grx di2 12 speed review
Charging port for the battery, just like the Road variants
shimano grx di2 12 speed review
Front Derailleur, aka FD-RX825
shimano grx di2 12 speed review
Shown with 48/31 chainrings, the 17T max difference exists in 12 speed
shimano grx di2 12 speed review
Being semi-wireless, the Front Derailleur connects directly to the seatpost battery
shimano grx di2 12 speed review
48/31 chainrings show, but 46/30 are also supported
12 speed grx di2 review
JOM in the Nevada wilderness riding GRX Di2 12-Speed
12 speed grx di2 review
Groupset fitted to the beautiful Framework Bicycles custom gravel bike
shimano grx di2 12 speed review
11-36 Cassette shown in action
shimano grx di2 12 speed review
Front Derailleur operation is flawless
shimano grx di2 12 speed review
Another view of the inside button, and Sprint Shifter
shimano grx di2 12 speed review
Super clean setup on the Framework Gravel Bike
shimano grx di2 12 speed review
GRX brakes are the same as those for the mechanical groupset
12 speed grx di2 review
160mm rotor shown with flat-mount GRX caliper
shimano grx di2 12 speed review
Another view of the Front Derailleur
shimano grx di2 12 speed review
Rear Derailleur shown with 11-36 cassette. 11-30, 11-34 are also available

GRX Labeled Pedals

12 speed grx di2 review
A nice touch to the GRX range
12 speed grx di2 review
This may be a rebadged Shimano XT Pedal

Learn more at Shimano’s Gravel Website

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1 Comment

  1. Avatar Steve

    Does the new GRX Di2 block small / small shifting like the 11 speed Di2? (Can’t use the 2 small cogs on the cassette when in the small ring on the crank).

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