Shimano GRX Di2 RD-RX827-SGS 1x12 Speed Rear Derailleur

Wireless Gravel Shifting Built for Range & Resilience

12 Speed
Rear

₹43,500

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The Shimano GRX Di2 RD-RX827 rear derailleur is engineered for riders who push deep into rough gravel and mixed terrain. Designed for 1x12-speed setups, it delivers fast, reliable electronic shifting with the strength needed for real-world riding. This is GRX performance without compromise.

Wide-Range 1x12 Compatibility: Paired with a 10–51T cassette, the RD-RX827 offers massive range for steep climbs and fast gravel sections. It supports both long adventures and race-paced efforts with equal confidence. Riders get flexibility without sacrificing shift speed.

Automatic Impact Recovery: Built-in automatic impact recovery protects the derailleur from hard trail strikes. The impact-deflecting shape helps it absorb hits and reset instantly. Even after rough encounters, shifting remains precise and consistent.

Shadow ES Stability and Durability: Shimano Shadow ES design refines chain stability with a slimmer and stronger profile. Solid pulley construction improves durability in dusty, rocky conditions. The result is quiet, controlled drivetrain performance on unpredictable surfaces.

Fully wireless Di2 shifting removes external wiring and reduces clutter. It’s designed specifically to handle the vibrations and abuse of gravel riding.

Product details

Specifications

Model No	RD-RX827-SGS
Series	GRX
Rear Speeds	12
Mount Type	Direct Attachment (Conventional)
Max. Front Difference	0T
Total Capacity	41T
Low Sprocket\|Max (T)	51
Low Sprocket\|Min (T)	51
Top Sprocket\|Max (T)	10
Top Sprocket\|Min (T)	10
Fluoric Coated Link Bushings	TBD
Pulley\|Guide Pulley Bearing	Sealed Bearing
Pulley\|Tension Pulley Bearing	Sealed Bearing
Pulley\|Teeth	13T
Pulley\|Sunken Type Pulley Screw	TBD
B-Axle\|Hollow Axle	TBD
B-Axle 2\|Hollow Axle	TBD

Firmware Update by E-Tube Project	Yes
SD50 Port (Pcs)	0
SD300 Port (Pcs)	0
SD50 Connector (Pcs)	0
SD300 Connector (Pcs)	0
LED for System Status	Yes
Di2 Shifting	Yes
Bluetooth LE Custom\|Adjust Mode Information: Yes
Bluetooth LE Custom\|Di2 Battery Level	Yes
Bluetooth LE Custom\|Gear Position	Yes
Bluetooth LE Custom\|Shimano E-Bike Systems Data Items: Yes
Bluetooth LE Custom\|Compatible with E-Tube Ride: Yes
Bluetooth LE Custom\|Compatible with E-Tube Project: Yes
ANT Private\|Adjust Mode Information	Yes
ANT Private\|Di2 Battery Level	Yes
ANT Private\|Gear Position	Yes
ANT Private\|Shimano E-Bike Systems Data Items: Yes

Features

Fully Wireless Shifting: Designed to deliver fast, reliable electronic shifting in rough gravel and mixed-terrain conditions.
Robust Design: Wide link structure, skid-plate design, durable aluminum plate and solid pulley improve strength and longevity.
RD Protection Function: Automatic Impact Recovery instantly returns the derailleur to position after trail impacts.
Protected Battery: Battery is securely enclosed to prevent movement on rough terrain while remaining removable for charging.

Technologies

Shimano Shadow ES: Slimmer, stronger derailleur profile with chain stabilization and Automatic Impact Recovery for quiet, controlled performance.
Di2 Digital Integrated Intelligence: Fast, accurate and reliable electronic shifting delivers seamless control and rider-to-bike integration.

Warranty and support

Covered by the manufacturer's warranty. Warranty claims go through us and we deal with the brand for you.

Shimano warranty terms

Questions after delivery? Ask TBA Guide or WhatsApp us.

Shipping and returns

We ship across India. Shipping is free on orders above ₹2,000 and ₹99 below that. Cash on delivery is available on orders up to ₹20,000, with a COD charge that depends on the order value. For a delivery estimate, enter your pincode in the box above the add-to-cart button: it shows the courier's own estimate for your address, not a promised date. If a parcel is held up we chase the courier until it is delivered. Full shipping policy

Most Shimano products take a little longer to ship.

Returns can be started within 7 days of delivery on unused items in their original condition with all tags and packaging. Apparel, helmets, gloves and similar items are returnable; wetsuits and products discounted by more than 5% are not. Compatibility questions are not grounds for a return unless our listing was wrong, so ask us before you order if you are unsure. Return shipping is arranged by you; on an accepted return you can choose an exchange, store credit or a refund after shipping and transaction charges. Orders can be cancelled only until they are processed. Full return and refund policy