--- product_id: 351880891 title: "Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage" brand: "shimano" price: "540.65 DT" currency: TND in_stock: true reviews_count: 5 category: "Shimano" url: https://www.desertcart.tn/products/351880891-alivio-rd-m3100-rear-derailleur-9-speed-long-cage store_origin: TN region: Tunisia --- # 45T chain wrap capacity 9-speed precision shifting Shadow RD tech for derailleur protection Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage **Brand:** shimano **Price:** 540.65 DT **Availability:** ✅ In Stock ## Summary > ⚡ Shift like a pro, conquer every trail. ## Quick Answers - **What is this?** Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage by shimano - **How much does it cost?** 540.65 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/351880891-alivio-rd-m3100-rear-derailleur-9-speed-long-cage) ## 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 - • **Long Cage Capacity:** Handles up to 45 teeth for versatile gearing on steep climbs and fast descents. - • **Lightweight & Compact:** At just 0.4 kg and a sleek 15 cm profile, it’s built for speed without bulk. - • **Direct Mount Stability:** Shimano Rear Direct Mount ensures a secure fit and enhanced drivetrain performance. - • **Trail-Ready Durability:** Shadow RD tech keeps your derailleur safe from rocks and roots, so you never miss a beat on rugged trails. - • **Smooth 9-Speed Shifting:** Experience crisp, reliable gear changes that keep your ride fluid and efficient. ## Overview The Shimano Alivio RD-M3100 Rear Derailleur is a 9-speed, long cage component featuring Shadow RD technology for low-profile protection against trail obstacles. With a 45-tooth chain wrap capacity and Shimano’s direct mount system, it delivers reliable, smooth shifting and durability for serious mountain biking. ## Description The Shimano Alivio RD-M3100 Rear Derailleur features Shadow RD technology to keep the derailleur safe from trail obstacles. Super low profile Shadow RD technology Largest Cog: 36 Drivetrain Speeds: 9 Cage Length: Long Chain Wrap Capacity (teeth): 45 teeth Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard Review: Shimano Alivio RD-M3100 - En orginal Shimano bakväxel som funkar helt perfekt som utbytesväxel Review: Bien - Muy bueno calidad precio, cambia los comicios muy suave ## Features - The Shimano Alivio RD-M3100 Rear Derailleur features Shadow RD technology to keep the derailleur safe from trail obstacles. - Super low profile Shadow RD technology - Largest Cog: 36 Drivetrain Speeds: 9 Cage Length: Long - Chain Wrap Capacity (teeth): 45 teeth - Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08CGYD213 | | Best Sellers Rank | #54,828 in Sports, Fitness & Outdoors ( See Top 100 in Sports, Fitness & Outdoors ) #64 in Bike Derailleurs & Parts | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Aluminium | | Colour | Black | | Country Of Origin | USA | | Customer Reviews | 4.6 out of 5 stars 659 Reviews | | Global Trade Identification Number | 04550170621155 | | Item Weight | 0.2 Kilograms | | Manufacturer | Shimano | | Manufacturer Part Number | ERDM3100SGS | | Material | Aluminium | | Material Type | Aluminium | | Model Number | C8C086 | | Mount Type | Clamp-On Mount | | Mounting Type | Clamp-On Mount | | Number of Teeth | 45 | | UPC | 192790621159 | ## Product Details - **Brand:** SHIMANO - **Colour:** Black - **Item Weight:** 200 Grams - **Case Material Type:** Aluminium - **Mounting Type:** Clamp-On Mount ## Images ![Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage - Image 1](https://m.media-amazon.com/images/I/51x63EFYbSL.jpg) ## Questions & Answers **Q: sirve para 2x9 de 11-40?** A: Trabaja bien para 3*9 **Q: Is this compatible for 8 speed?** A: Not perfectly - the m3100 model is really meant for 9 speed **Q: Will this replace the stx rc on a Trek 7300 8 speed?** A: Shimano's Compatibility charts won't show this "9-speed" derailleur as compatible with 8-speed components, but it should work just fine. Shimano 8-speed shifters will work. This RD can handle larger cogs than were common in the 8-speed era, up to 36t largest cog, but assuming you have 11-32 it'll work. I have an stx rc RD on one of my bikes, and wouldn't hesitate to try this as a replacement. **Q: Does it come with the hanger bolt?** A: Hi - It does not. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Shimano Alivio RD-M3100 *by H***S on 25 November 2025* En orginal Shimano bakväxel som funkar helt perfekt som utbytesväxel ### ⭐⭐⭐⭐⭐ Bien *by L***S on 24 May 2025* Muy bueno calidad precio, cambia los comicios muy suave ### ⭐⭐⭐⭐ Op tijd bezorgd *by A***L on 8 September 2025* Prima ## 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.tn/products/351880891-alivio-rd-m3100-rear-derailleur-9-speed-long-cage](https://www.desertcart.tn/products/351880891-alivio-rd-m3100-rear-derailleur-9-speed-long-cage) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-05*