The Shimano GRX 11-Speed Di2 rear derailleur brings mountain bike technology to gravel riding with a clutch equipped rear derailleur allowing smooth shifting on rough terrain. The Shadow RD Technology utilizes it's race-proven, low-profile design to offer a derailleur that is more compact and fits closer to the frame, ensuring less damage in a crash. With the adjustable chain stabilizer, chain slapping and dropping are prevented while the gravel-tuned clutch tension provides silent and uninterrupted electronic rear shifting on the roughest terrain.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.
Mfg PartNum: RD-RX815
Series: SHIMANO GRX DI2
Total Capacity: 38T
Max. front difference: 17T
Top sprocket: 11T/Min. 11T
Low sprocket: Max. 34T/Min. 30T
Top-Normal Spring Type: SHADOW RD plus
Weight: 287 g
Mount Type: Standard Rear Hanger