--- product_id: 216478948 title: "Black,ERDM3100SGS Alivio Alivio M3100 rear derailleur, 9-speed, Shadow design, SGS long cage" brand: "shimano" price: "VT18032" currency: VUV in_stock: true reviews_count: 8 category: "Shimano" url: https://www.desertcart.vu/products/216478948-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow store_origin: VU region: Vanuatu --- # Lightweight 0.2 kg aluminum build 9-speed precision shifting Shadow RD tech for impact protection Black,ERDM3100SGS Alivio Alivio M3100 rear derailleur, 9-speed, Shadow design, SGS long cage **Brand:** shimano **Price:** VT18032 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift into adventure mode with Shimano’s stealthy, smooth operator! ## Quick Answers - **What is this?** Black,ERDM3100SGS Alivio Alivio M3100 rear derailleur, 9-speed, Shadow design, SGS long cage by shimano - **How much does it cost?** VT18032 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/216478948-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow) ## 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 - • **Shadow RD Design:** Ultra-flat profile minimizes damage risk from trail obstacles—ride harder, worry less. - • **Effortless Installation:** User-friendly Shimano Direct Mount design makes upgrades and replacements a breeze—even for beginners. - • **Durable Lightweight Build:** Crafted from premium aluminum and steel for strength without the bulk, keeping your ride agile. - • **Seamless 9-Speed Shifting:** Experience silky smooth gear changes with Shimano’s HyperGlide system, engineered for trail and trekking mastery. - • **Long Cage SGS Compatibility:** Optimized for 3x9 speed setups, ensuring perfect chain tension and reliable performance on varied terrains. ## Overview The Shimano Alivio M3100 rear derailleur is a 9-speed, long cage SGS model featuring Shadow RD technology for enhanced durability and impact resistance. Built with lightweight aluminum and steel, it delivers precise, smooth shifting optimized for trail and trekking bikes. Its flat design reduces damage risk, while the HyperGlide system protects drivetrain components from wear. Ideal for riders seeking reliable performance and easy installation. ## Description SHIMANO,Black,ERDM3100SGS Alivio Alivio M3100 rear derailleur, 9-speed, Shadow design, SGS long cage : desertcart.co.uk: Sports & Outdoors Review: Excellent replacement for scrapped gear set - Used these to replace the smashed ones when I fell off my bike. Took my time setting them up and used a new cable /chain and gear change is silky smooth. Review: Great value - Easy to fit and for a complete noob whom can't elven ride so knows nothing about bikes but had to repair my sons it was simple and easy fit replacement ## Features - The Shimano Alivio rear derailleur with Shadow RD technology is even better than its predecessor for trail and trekking use - Thanks to the very flat design and the optimised spring tension, a strike on the chain stay is prevented and even trail obstacles have hardly a chance of damaging the rear derailleur. - The rear derailleur supports nine gear levels and the HyperGlide system, which protects the drive components from premature wear. - Shimano ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08CGYD213 | | Best Sellers Rank | 12,172 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 9 in Bike Rear Dérailleurs | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Steel & Aluminum | | Colour | Black | | Customer Reviews | 4.6 out of 5 stars 625 Reviews | | Global Trade Identification Number | 04550170621155 | | Included Components | nothing | | Item Dimensions L x W x H | 17L x 11W x 10H centimetres | | Item Type Name | MTB ALIVIO M3100 Rear Derailleur 3x9S Long Stick 45 | | Item Weight | 0.2 Kilograms | | Item weight | 0.2 Kilograms | | Manufacturer | SHIMANO | | Manufacturer Part Number | ERDM3100SGS | | Manufacturer Warranty Description | producer | | Material | Aluminium | | Material Type | Aluminium | | Model Number | C8C086 | | Mount Type | Shimano Rear Direct Mount | | Mounting type | Shimano Rear Direct Mount | | Number of Teeth | 36 | | Product dimensions | 17L x 11W x 10H centimetres | | UPC | 192790621159 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** SHIMANO - **Colour:** Black - **Item weight:** 0.2 Kilograms - **Material:** Aluminium - **Mounting type:** Shimano Rear Direct Mount ## Images ![Black,ERDM3100SGS Alivio Alivio M3100 rear derailleur, 9-speed, Shadow design, SGS long cage - Image 1](https://m.media-amazon.com/images/I/51x63EFYbSL.jpg) ## Questions & Answers **Q: Would this work with a 42t cassette?** A: Shimano are listing the max sprocket size as 36T. You may be able to get it to work on a 42T with a hanger extender. **Q: Will this work on an 8 speed cassette** A: It is designed for a 9 speed setup but should work fine on 8 speed also. **Q: Would this work in 9 x 1 setup and how large can the cassette go?** A: Yes it should be fine on a 1 x 9 setup, the max sprocket on the Shimano website is 45T ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent replacement for scrapped gear set *by R***O on 8 December 2025* Used these to replace the smashed ones when I fell off my bike. Took my time setting them up and used a new cable /chain and gear change is silky smooth. ### ⭐⭐⭐⭐⭐ Great value *by S***E on 11 July 2025* Easy to fit and for a complete noob whom can't elven ride so knows nothing about bikes but had to repair my sons it was simple and easy fit replacement ### ⭐⭐⭐⭐⭐ The Quality of product *by B***N on 30 July 2025* Very good derailed ## Frequently Bought Together - Shimano,Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage - SHIMANO Alivio SL-M3100 Alivio Shift Lever, 9-Speed, Band on, Right Hand,Black --- ## 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/216478948-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow](https://www.desertcart.vu/products/216478948-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-06*