--- product_id: 329226134 title: "XTR M9100 12-Speed Rear Derailleur" brand: "shimano" price: "$407.79" currency: USD in_stock: true reviews_count: 5 category: "Shimano" url: https://www.desertcart.us/products/329226134-xtr-m9100-12-speed-rear-derailleur store_origin: US region: United States of America --- # 12-speed precision shifting Cold forged aluminum durability 1x & 2x drivetrain compatibility XTR M9100 12-Speed Rear Derailleur **Brand:** shimano **Price:** $407.79 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Shift Like a Pro, Ride Like You Mean It! ## Quick Answers - **What is this?** XTR M9100 12-Speed Rear Derailleur by shimano - **How much does it cost?** $407.79 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/329226134-xtr-m9100-12-speed-rear-derailleur) ## 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 - • **Carbon Outer Cage Plate:** Enhanced stiffness and reduced weight combine for quicker, more responsive shifting that leaves competitors behind. - • **Lightweight & Rugged Build:** Cold forged aluminum body ensures unbeatable strength without the weight penalty—ride harder, faster, longer. - • **Seamless 12-Speed Shifting:** Experience ultra-smooth gear transitions with Shimano’s top-tier 12-speed tech, engineered for flawless performance on every ride. - • **Pro-Level Precision & Reliability:** Trusted by elite cyclists worldwide, this derailleur delivers consistent, easy adjustments and rock-solid durability—because your ride deserves the best. - • **Versatile Drivetrain Compatibility:** Optimized for both 1x and 2x setups, giving you the freedom to customize your ride without compromise. ## Overview The Shimano XTR M9100 12-Speed Rear Derailleur features a cold forged aluminum body and a carbon outer cage plate, delivering lightweight durability and precision. Compatible with both 1x and 2x drivetrains, it supports a wide 10-51T gear range for versatile performance. Designed for professional-grade shifting smoothness and reliability, it’s the ultimate upgrade for serious cyclists seeking flawless gear transitions and long-lasting performance. ## Description RD-M9100 XTR 12-speed rear derailleur, SGS long cage, for 10-51T/single ring Review: Quality Derailleur Review: 高価ですがXTより数段良かったです！ - 私の使用状況ではXTより数段良いです！シビアな12SのSHIMANOとSRAM製スプロケット両方で使用していますが、調整も超簡単で格段に気持ちよくスムーズなシフトで驚きました！何か秘密があるんでしょうね～ＸＴより１万以上も高いですが。。。でもXTや他メーカーには戻れません!壊れたらまた購入します！ ## Features - Cold forged aluminium body - Front wheel drive compatibility: 1x and 2x - Carbon outer cage plate ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07F2PBJTB | | Best Sellers Rank | #76,525 in Sporting Goods ( See Top 100 in Sporting Goods ) #48 in Bike Derailleurs & Parts #71 in Bike Shifters & Parts | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Aluminum | | Color | Standard | | Colour | Standard | | Customer Reviews | 4.3 out of 5 stars 30 Reviews | | Global Trade Identification Number | 04524667880257 | | Included Components | Bike Parts | | Item Dimensions L x W x H | 23L x 16W x 11H millimeters | | Item Type Name | Bike Parts | | Item Weight | 0.42 Kilograms | | Item weight | 0.42 Kilograms | | Manufacturer | Shimano XTR | | Manufacturer Part Number | IRDM9100SGS | | Material | Aluminum | | Material Type | Aluminum | | Model Number | RDM9100SGS | | Mount Type | Clamp-On Mount | | Mounting type | Clamp-On Mount | | Number of Teeth | 12 | | Product dimensions | 23L x 16W x 11H millimeters | ## Product Details - **Brand:** SHIMANO - **Colour:** Standard - **Material:** Aluminum - **Item weight:** 0.42 Kilograms - **Mounting type:** Clamp-On Mount ## Images ![XTR M9100 12-Speed Rear Derailleur - Image 1](https://m.media-amazon.com/images/I/71aHFM69RHL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality Derailleur *by R***R on 9 August 2024* ### ⭐⭐⭐⭐⭐ 高価ですがXTより数段良かったです！ *by A***ー on 7 February 2023* 私の使用状況ではXTより数段良いです！シビアな12SのSHIMANOとSRAM製スプロケット両方で使用していますが、調整も超簡単で格段に気持ちよくスムーズなシフトで驚きました！何か秘密があるんでしょうね～ＸＴより１万以上も高いですが。。。でもXTや他メーカーには戻れません!壊れたらまた購入します！ ### ⭐⭐⭐⭐⭐ Shimano Qualität *by J***D on 18 January 2025* Wie zu erwarten hohe Qualität. ## Frequently Bought Together - SHIMANO XTR M9100 12-Speed Rear Derailleur - Stan's NoTubes Tire Sealant - SHIMANO Mineral Oil --- ## 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.us/products/329226134-xtr-m9100-12-speed-rear-derailleur](https://www.desertcart.us/products/329226134-xtr-m9100-12-speed-rear-derailleur) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-18*