Shimano Ultegra Di2 RD-R8150 2x12 Speed Rear Derailleur

Fastest-Ever Ultegra Di2 Shifting for Modern Road Drivetrains

12 Speed
Rear

₹31,660

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The Shimano Ultegra Di2 RD-R8150 rear derailleur delivers Shimano’s fastest and most accurate shifting for modern road riding. Designed for 2x12-speed drivetrains, it brings race-level electronic performance to riders who demand smooth and consistent gear changes. This is Ultegra refined for today’s roads.

Lightning-Fast Di2 Shifting: Integrated with Shimano’s latest Di2 platform, the RD-R8150 executes gear changes instantly and precisely. Shifts are crisp and dependable under load, whether sprinting or climbing. The electronic system ensures accuracy ride after ride.

Single Cage, Wide Compatibility: A single cage length supports a wide range of cassette options, handling low sprockets from 28T to 34T. This versatility allows riders to choose gearing based on terrain without changing derailleur setups. Ideal for varied road conditions and endurance riding.

Optimised for 12-Speed Road Drivetrains: Designed specifically for Shimano’s 12-speed road groupsets, the RD-R8150 ensures smooth gear transitions across the entire cassette. Chain control and alignment are tuned for efficiency and quiet operation. The result is seamless performance at speed.

Fewer external components improve reliability and aesthetics. The Ultegra Di2 RD-R8150 is built for riders who value speed, precision and modern electronic control.

Product details

Specifications

Model No	RD-R8150
Series	Ultegra
Color	Series color
Rear Speeds	12
RD Construction\|Shimano Shadow RD	Yes
Mount\|Direct Attachment (Conventional)	Yes
Mount\|Direct Mount	Yes
Max. Front Difference	16T
Total Capacity	39T
Low Sprocket\|Max	34T
Low Sprocket\|Min	30T
Top Sprocket\|Max	11T
Top Sprocket\|Min	11T
Fluoric Coated Link Bushings	4
Pulley\|Guide Pulley Bearing	Yes
Pulley\|Tension Pulley Bearing	Yes
Pulley\|Teeth	11
Pulley\|Sunken Type Pulley Screw	Yes
B-Axle\|Hollow Axle	Yes
B-Axle 2\|Hollow Axle	Yes
Di2 Connectivity Wired\|Di2 Shifting	Yes

Firmware Update by E-Tube Project	Yes
SD50 Port (Pcs)	0
SD300 Port (Pcs)	1
SD50 Connector (Pcs)	0
SD300 Connector (Pcs)	0
LED for System Status	Yes
Charging Cable	EW-EC300
Average Weight (g)	262
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
Remarks	w/o Bracket spec. available

Features

Fastest Rear Shifting: Delivers Shimano’s quickest rear shifts, 58% faster than RD-R9150 for instant gear changes.
LED Status Indicator: Integrated LED provides clear system status and setup feedback at a glance.
Battery Indicator: Visual battery status helps riders monitor charge levels before and during rides.
Wireless Pairing Support: Built-in pairing capability enables clean integration with Shimano Di2 systems.
Adjust Mode Functionality: Supports electronic adjustment mode for precise setup and fine-tuning.
Wider Range Capacity: Single cage design supports a broad cassette range for versatile road gearing.
34T Max Low Sprocket: Compatible with up to 34T cassettes for climbing-friendly gearing options.

Technologies

Shimano Shadow RD: Low-profile derailleur design improves chain control, reduces noise and delivers smooth, quiet shifting.
Direct Mount Rear Derailleur: Optional direct mount compatibility improves frame clearance and simplifies rear wheel removal on compatible frames.

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