---
product_id: 497523436
title: "Shimano Ultegra RD-R8150 Di2 Rear Derailleur - 12-Speed, Medium Cage, Black"
brand: "shimano"
price: "$1474.81"
currency: USD
in_stock: true
reviews_count: 3
category: "Shimano"
url: https://www.desertcart.us/products/497523436-shimano-ultegra-rd-r8150-di2-rear-derailleur-12-speed-medium
store_origin: US
region: United States of America
---

# Integrated wireless unit LED battery & status indicator 12-speed precision shifting Shimano Ultegra RD-R8150 Di2 Rear Derailleur - 12-Speed, Medium Cage, Black

**Brand:** shimano
**Price:** $1474.81
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift smarter, ride faster — the future of cycling tech is here!

## Quick Answers

- **What is this?** Shimano Ultegra RD-R8150 Di2 Rear Derailleur - 12-Speed, Medium Cage, Black by shimano
- **How much does it cost?** $1474.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/497523436-shimano-ultegra-rd-r8150-di2-rear-derailleur-12-speed-medium)

## Best For

- shimano enthusiasts

## Why This Product

- Trusted shimano brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Wireless Integration:** Compact design with built-in wireless unit, charger, and switch for clutter-free, smart connectivity.
- • **Lightweight & Durable:** Crafted from aluminum and carbon fiber for a featherlight 0.9 lb build that lasts.
- • **Versatile Medium Cage:** Optimized for 11-28 to 11-34 tooth cassettes, handling a wide gear range with ease.
- • **Intuitive LED Indicators:** Stay informed on battery life, pairing status, and adjustments at a glance.
- • **Seamless 12-Speed Shifting:** Experience ultra-smooth, lightning-fast gear changes with Shimano’s cutting-edge Di2 technology.

## Overview

The Shimano Ultegra RD-R8150 Di2 Rear Derailleur is a premium 12-speed electronic shifting component featuring a compact wireless-integrated design, medium cage compatibility with up to 34-tooth sprockets, and intuitive LED status indicators. Engineered from lightweight aluminum and carbon fiber, it delivers precise, reliable performance for serious road cyclists seeking cutting-edge drivetrain technology.

## Description

With the fast and accurate Di2 shifting technology, the Shimano 12-speed Ultegra RD-R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11-28, 11-30, and 11-34 cassettes.• Compact design includes an integrated wireless unit, charger, switch• Wider range capacity• Max. low sprocket 34t• LED status indicator• Battery indicator, pairing, adjust mode etc.Brand: Shimano

Review: for my dream road bike
Review: The price was very tempting. This Ultegra derailleur works perfectly, for me it is the best alternative to the Dura-Ace 9200 12s derailleur

## Features

- Compact design includes an integrated wireless unit, charger, switch
- Wider range capacity
- Max. low sprocket 34t
- LED status indicator.Chain Wrap Capacity (teeth): 39.Rear Der/Shifter Compatibility: Shimano Road Di2.Cage Length: Medium.Drivetrain Speeds: 12
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09YJSJNBS |
| Brand Name | SHIMANO |
| Case Material Type | Aluminium |
| Colour | Black |
| Customer Reviews | 5.0 5.0 out of 5 stars (14) |
| Included Components | Shimano Ultegra RD-R8150 Di2 Rear Derailleur |
| Item Dimensions L x W x H | 17.8L x 17.8W x 17.8H centimetres |
| Item Weight | 0.9 Pounds |
| Manufacturer | Shimano |
| Manufacturer Part Number | IRDR8150A |
| Material Type | Aluminum Carbon Fiber |
| Mount Type | Braze-On Mount |
| Number of Teeth | 34 |
| UPC | 192790874999 |

## Product Details

- **Brand:** SHIMANO
- **Colour:** Black
- **Item weight:** 0.9 Pounds
- **Material:** Aluminum Carbon Fiber
- **Mounting type:** Braze-On Mount

## Images

![Shimano Ultegra RD-R8150 Di2 Rear Derailleur - 12-Speed, Medium Cage, Black - Image 1](https://m.media-amazon.com/images/I/61qtfplzLFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***L on 8 March 2024*

for my dream road bike

### ⭐⭐⭐⭐⭐ Review
*by H***. on 22 November 2023*

The price was very tempting. This Ultegra derailleur works perfectly, for me it is the best alternative to the Dura-Ace 9200 12s derailleur

### ⭐⭐⭐⭐⭐ Review
*by J***A on 2 June 2023*

This works great! Love di2!

## Frequently Bought Together

- Shimano Ultegra RD-R8150 Di2 Rear Derailleur - 12-Speed, Medium Cage, Black
- SHIMANO Ultegra Fd-R8150 Di2 Front Derailleur Grey, Braze-On
- SHIMANO Bt-Dn300 Battery Black, One Size

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**Shop now:** [https://www.desertcart.us/products/497523436-shimano-ultegra-rd-r8150-di2-rear-derailleur-12-speed-medium](https://www.desertcart.us/products/497523436-shimano-ultegra-rd-r8150-di2-rear-derailleur-12-speed-medium)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-19*