Shimano GRX FD-RX815 Di2 Front Derailleur

GRX FD-RX815 Di2 Front Derailleur

Gravel riders rejoiced when Shimano launched into its new GRX groupset, and its easy to see why when we´ve been stuck piecing together our groupsets from mismatched elements of road and mountain components for years. But we´d wager that even if we´d had other options in the past, we still would be ecstatic to see Shimano´s GRX FD-RX815 Di2 Front Derailleur hit the market, offering electronic shifting to the front-end, plus extra clearance for running lofty tires that soak up chatter from poorly-graded gravel and rowdy singletrack. As you would expect from anything holding Shimano´s Di2 designation, the Fd-RX815 front derailleur can be programmed with trim settings, and can be used in either full or semi SynchroShift modes for near-fluid feeling shifts.

While internally the GRX Di2 front derailleur works similarly to its road counterpart, where it differs is firstly in its placement. It offers 2.5+ millimeters of extra space for your rear tire, enabling you to roll on bigger tires without risk of component hang-ups. Secondly it also offers a wider, 17t front range, so you can run a big ring between 46 and 50 tooth, with a much smaller inner ring to give you some much needed respite on the major climbs when you´re a hundred miles from anywhere and searching your core for energy.

Details

• Slick shifts and reliability abound with Shimano´s gravel Di2
• Braze-on derailleur offers 2.5+mm of extra clearance for tires
• Semi and full SynchroShift compatible for ultra-smooth shifts
• Wider front gearing range tuned to the demands of gravel riding
• Internal tech works the same as Ultegra Di2 for reliability
• Built to handle smooth shifting, even under pedaling torque
• Auto-trims prevent chain rub when working through shifts
• Customize your shifting with E-Tube
• Item #SHIU19C

Tech Specs

Material

aluminum

Mount Type

braze-on

Gearing

[top gear teeth] 46 - 50t, [capacity] 17t

Compatibility

Shimano GRX Di2 shifters, Shimano GRX 11-speed cranksets, Shimano 11-speed chains

Claimed Weight

4.6oz

Manufacturer Warranty

2 years