---
product_id: 66952101
title: "Ultegra R8000 Rear Derailleur Medium Box"
brand: "shimano"
price: "B/.326"
currency: PAB
in_stock: true
reviews_count: 13
category: "Shimano"
url: https://www.desertcart.com.pa/products/66952101-ultegra-r8000-rear-derailleur-medium-box
store_origin: PA
region: Panama
---

# Alloy build for lightweight durability 11-speed precision shifting Compatible with 11-34t cassette range Ultegra R8000 Rear Derailleur Medium Box

**Brand:** shimano
**Price:** B/.326
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift into the future with Shimano Ultegra R8000 – where precision meets power!

## Quick Answers

- **What is this?** Ultegra R8000 Rear Derailleur Medium Box by shimano
- **How much does it cost?** B/.326 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/66952101-ultegra-r8000-rear-derailleur-medium-box)

## 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

- • **Flawless 11-Speed Shifting:** Experience ultra-smooth gear changes with Shimano’s precise indexing system.
- • **Cable Management Reinvented:** Neatly routes excess cable to prevent snagging and fraying during intense rides.
- • **Integrated Road Link Included:** Seamlessly upgrade from older models without extra parts or hassle.
- • **Lightweight Alloy Construction:** Durable yet featherlight design keeps your ride fast and responsive.
- • **Expanded Cassette Compatibility:** Supports up to 11-34t cassettes, unlocking wider gear ranges for any terrain.

## Overview

The Shimano Ultegra R8000 Rear Derailleur Medium Box is a top-tier 11-speed road bike component engineered for flawless shifting and broad cassette compatibility (up to 11-34t). Crafted from lightweight alloy, it features an integrated road link and advanced cable management, making it the ultimate upgrade for serious cyclists seeking performance and reliability.

## Description

desertcart.com : Shimano Ultegra RD-R8000-SS Rear Derailleur - 11 Speed, Short Cage, Black : Sports & Outdoors

Review: Excellent derailleur - perhaps the most worthwhile upgrade from 6800 - TL;DR: Excellent product, a real improvement over the previous version. I bought this to replace a 6800 RD that I snapped off of my bike. I used to have a road link to allow for bigger cassettes without any problems. This version has a "road link" included in it. Installation is a bit different than the previous versions: First, the shift cable fastener thingy feels much more sturdy and routes the excess shift cabling neatly behind the derailleur, so it doesn't stick out anymore. It has much less chance of catching something and fraying. Another change is the indexing knob - it has this tiny lock that you need to actuate in order to turn around. Indexing was a breeze - took literally five minutes and now shifting is flawless on an 11-32 cassette. I need to try it with my 11-40 but watching some youtube videos it can tackle it no problem. This is maybe the most worthwhile upgrade from 6800, is completely backwards compatible. This is the first time a Shimano road derailleur works flawlessly with up to 11-40.
Review: Great Product Highest Quality - You can not beat the quality in design and engineering with SHIMANO. Even their lower cost items are of exceptional quality. I upgraded from the SHIMANO Ultegra Short-Cage Rear Derailleur to the Mid-Cage. This allowed me to increase the size of my rear cassette from 11-28 to 11-34. I have even gone to a Shram 11-36 and love the performance.

## Features

- Material: alloy
- Capacity: [short] 35t, [long] 39t
- Cassette Range: [short] 11-30 t, [long] 11-34 t
- Gearing: double
- Compatibility: Shimano Ultegra R8000, Shimano Dura-Ace R9100

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B072MKT5NR |
| Best Sellers Rank | #99,324 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #36 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.8 4.8 out of 5 stars (737) |
| Date First Available | June 9, 2017 |
| Global Trade Identification Number | 00689228623156, 04524667623151 |
| Included Components | Bike Parts |
| Item Dimensions LxWxH | 5.75 x 4.5 x 3.75 inches |
| Item Package Dimensions L x W x H | 5 x 4.96 x 2.28 inches |
| Manufacturer | Shimano |
| Model Name | C8C055 |
| Model Year | 2017 |
| Number of Items | 1 |
| Package Weight | 0.2 Kilograms |
| Part Number | IRDR8000SS |
| Product Dimensions | 9"L x 4.5"W x 4"H |
| Size | Short |
| Sport Type | Cycling |
| Style | Rear Derailleur |
| Suggested Users | mens |
| UPC | 689228623156 |
| Warranty Description | 2 Year Manufacturer |

## Product Details

- **Brand:** SHIMANO
- **Color:** Gray
- **Item Weight:** 198 Grams
- **Material:** Metal
- **Mounting Type:** Braze-On Mount

## Images

![Ultegra R8000 Rear Derailleur Medium Box - Image 1](https://m.media-amazon.com/images/I/51h5L8rAflL.jpg)

## Questions & Answers

**Q: Is the "medium" cage the ss or the gs version? shimano literature does not use the terms "short" or "medium" in their descriptions of the rd 8000.**
A: medium is GS, short is SS for Shimano RD-8000 derailleurs. They cover 11-28T to 11-34T and 11-25T to 11-28T, respectively. 
See https://bike.shimano.com/en-EU/product/component/ultegra-r8000.html

**Q: is this for 10 speed ?**
A: Actually, this will work with 10sp Tiagra.  If you have ST-4700 levers (not sure about the MTB (flat bar) shifter version), then the pull ratio will work for and as 10sp on your 10sp cassette and shifter.   You'll be future-proofed when you decide to switch out the lever, chain and cassette for actual 11sp.  

I am running ST-4700, RD-R8000GS, CS-MT771-10, CN-6701 (10sp) chain and everything works flawlessly.

**Q: El de tamaño M es el conocido como patilla larga ?**
A: Sí, es lo mismo que pata larga.

**Q: What length of chain do I need with a medium cage?**
A: Hi, we sell standard length: 116 link & you buy it & you have to cut yourself. if you need chain, we have it at my amazon store cycle4less asin #B00KQK5RAW. Bob

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent derailleur - perhaps the most worthwhile upgrade from 6800
*by N***F on September 11, 2017*

TL;DR: Excellent product, a real improvement over the previous version. I bought this to replace a 6800 RD that I snapped off of my bike. I used to have a road link to allow for bigger cassettes without any problems. This version has a "road link" included in it. Installation is a bit different than the previous versions: First, the shift cable fastener thingy feels much more sturdy and routes the excess shift cabling neatly behind the derailleur, so it doesn't stick out anymore. It has much less chance of catching something and fraying. Another change is the indexing knob - it has this tiny lock that you need to actuate in order to turn around. Indexing was a breeze - took literally five minutes and now shifting is flawless on an 11-32 cassette. I need to try it with my 11-40 but watching some youtube videos it can tackle it no problem. This is maybe the most worthwhile upgrade from 6800, is completely backwards compatible. This is the first time a Shimano road derailleur works flawlessly with up to 11-40.

### ⭐⭐⭐⭐⭐ Great Product Highest Quality
*by S***R on February 11, 2023*

You can not beat the quality in design and engineering with SHIMANO. Even their lower cost items are of exceptional quality. I upgraded from the SHIMANO Ultegra Short-Cage Rear Derailleur to the Mid-Cage. This allowed me to increase the size of my rear cassette from 11-28 to 11-34. I have even gone to a Shram 11-36 and love the performance.

### ⭐⭐⭐⭐⭐ Works great!
*by N***S on February 12, 2018*

Very easy bolt-on, slightly finicky initial alignment setup....but it worked GREAT with my 6800 shifters on a 42 mile hilly, windy ride, so there was LOTS of shifting. Didn't miss even one, and it passed the ultimate test, it crosschained without complaint on the 34, and was even quieter than my 32 tooth setup while doing it!! And of course, the bailout gear was welcome climbing into a stiff wind. Two thumbs up on this one! Hot tip: Have an extra shifer cable on hand BEFORE you install, just in case you bugger up the end of your original cable, or it should end up an inch too short. Don't ask how I know this.

## Frequently Bought Together

- Shimano Ultegra R8000 Rear Derailleur Medium Box
- Shimano Ultegra/XT CN-HG701 11-Speed Chain W/Quick Liink
- SHIMANO Unisex 305751220 Ultegra Cassette R8000 11V 11 V, Silber, One Size EU

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**Shop now:** [https://www.desertcart.com.pa/products/66952101-ultegra-r8000-rear-derailleur-medium-box](https://www.desertcart.com.pa/products/66952101-ultegra-r8000-rear-derailleur-medium-box)

---

*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-04*