--- product_id: 66952101 title: "Ultegra R8000 Rear Derailleur Box" brand: "shimano" price: "VT39889" currency: VUV in_stock: true reviews_count: 13 category: "Shimano" url: https://www.desertcart.vu/products/66952101-ultegra-r8000-rear-derailleur-box store_origin: VU region: Vanuatu --- # Medium cage for 11-34T cassette range 11-speed precision shifting Compatible with Ultegra R8000 & Dura-Ace R9100 Ultegra R8000 Rear Derailleur Box **Brand:** shimano **Price:** VT39889 **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 Box by shimano - **How much does it cost?** VT39889 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/66952101-ultegra-r8000-rear-derailleur-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 - • **Sleek Cable Management:** Neatly routes excess shift cable to prevent snagging and fraying—ride worry-free. - • **Robust Medium Cage Design:** Optimized for durability and performance on varied terrain and longer rides. - • **Flawless 11-Speed Shifting:** Experience ultra-smooth gear changes with Shimano’s precision engineering. - • **Backwards Compatible Upgrade:** Seamlessly replaces older models like the 6800, unlocking next-level performance. - • **Expanded Cassette Compatibility:** Handle cassettes up to 11-34T (and beyond) without a hitch for ultimate versatility. ## Overview The Shimano Ultegra R8000 Rear Derailleur Medium Box is a high-performance, 11-speed rear derailleur designed for road cyclists seeking smooth, reliable shifting. Featuring a medium cage compatible with 11-34T cassettes, it supports a wide gear range and fits both Ultegra R8000 and Dura-Ace R9100 groupsets. Its advanced cable routing and indexing system ensure quick, flawless gear changes, making it a top-tier upgrade for serious riders. ## Description Shimano Ultegra RD-R8000-SS Rear Derailleur - 11 Speed, Short Cage, Black ## 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 | #84,363 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #38 in Rear Bike Derailleurs | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Other | | Color | Gray | | Customer Reviews | 4.8 out of 5 stars 747 Reviews | | Global Trade Identification Number | 00689228623156, 04524667623151 | | Included Components | Bike Parts | | Item Dimensions L x W x H | 9"L x 4.5"W x 4"H | | Item Type Name | Bicycle Parts | | Manufacturer | Shimano | | Manufacturer Part Number | IRDR8000SS | | Material | Metal | | Material Type | Metal | | Model Number | C8C055 | | Mount Type | Braze-On Mount | | Mounting Type | Braze-On Mount | | Number of Teeth | 35 | | Product Dimensions | 9"L x 4.5"W x 4"H | | UPC | 689228623156 | | Unit Count | 1.0 Count | | Warranty Description | 2 Year Manufacturer | ## Product Details - **Brand:** SHIMANO - **Color:** Gray - **Material:** Metal - **Mounting Type:** Braze-On Mount - **Product Dimensions:** 9"L x 4.5"W x 4"H ## Images ![Ultegra R8000 Rear Derailleur Box - Image 1](https://m.media-amazon.com/images/I/51h5L8rAflL.jpg) ## Available Options This product comes in different **Color, Size** options. ## 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 ### ⭐⭐⭐⭐⭐ Review *by N***F on September 11, 2017* ### ⭐⭐⭐⭐⭐ Review *by S***R on February 11, 2023* ### ⭐⭐⭐⭐⭐ Review *by N***S on February 12, 2018* ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/66952101-ultegra-r8000-rear-derailleur-box](https://www.desertcart.vu/products/66952101-ultegra-r8000-rear-derailleur-box) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-03*