--- product_id: 204469439 title: "microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black" brand: "microshift" price: "A$33" currency: AUD in_stock: true category: "Micro Shift" url: https://www.desertcart.com.au/products/204469439-microshift-m21-rear-derailleur-6-7-speed-super-short-cage store_origin: AU region: Australia --- # Super short cage, 241g lightweight High-strength composite & steel 6-7 speed compatible microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black **Brand:** microshift **Price:** A$33 **Availability:** ✅ In Stock ## Summary > ⚡ Shift Fast, Ride Faster — Upgrade Your Ride with microSHIFT M21! ## Quick Answers - **What is this?** microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black by microshift - **How much does it cost?** A$33 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/204469439-microshift-m21-rear-derailleur-6-7-speed-super-short-cage) ## Best For - microshift enthusiasts ## Why This Product - Trusted microshift brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleek & Stealthy:** Matte black finish blends style with corrosion resistance, perfect for the discerning rider. - • **Compact Powerhouse:** Super short cage design optimizes chain wrap and maximizes road clearance for urban and trail agility. - • **Effortless Integration:** Standard 10x1 mount fits most bikes, making upgrades and replacements hassle-free. - • **Durability Meets Agility:** Robust composite and steel build ensures long-lasting performance without the weight penalty. - • **Precision Shifting Mastery:** Seamlessly shifts across 6- and 7-speed systems for flawless gear transitions. ## Overview The microSHIFT M21 Rear Derailleur is a lightweight (241g), super short cage drivetrain component engineered for 6- and 7-speed road and mountain bikes. Combining high-strength composite and steel materials, it delivers precise, rapid gear changes with a max cog size of 32 teeth. Its sleek black finish and standard 10x1 mounting make it a durable, stylish, and easy-to-install upgrade for riders seeking responsive shifting and enhanced ride efficiency across diverse terrains. ## Description The microSHIFT M21 Rear Derailleur is designed for 6- and 7-speed road and mountain bike shifters. It features a super short cage and supports a largest cog size of up to 32 teeth. Constructed from durable composite and steel materials, this black rear derailleur uses a 10x1 standard mount and offers a chain wrap capacity of 21 teeth. It is compatible with both mountain and road drivetrains. ## Features - Robust composite and steel construction - Features a super short cage for efficient chain wrap capacity of 21 teeth. - Constructed with robust composite and steel materials for durability. - Compatible with mountain and road systems using 10x1 standard mount. - Supports largest cog size up to 32 teeth for reliable shifting performance. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083WVF61S | | Best Sellers Rank | #399,181 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #354 in Rear Bike Derailleurs | | Brand Name | microSHIFT | | Case Material Type | Aluminum | | Color | Black | | Customer Reviews | 4.1 4.1 out of 5 stars (26) | | Global Trade Identification Number | 04710495436388 | | Included Components | Rear Derailleur | | Item Dimensions L x W x H | 10"L x 8"W x 2"H | | Item Highlight | microSHIFT M21 6/7-Speed Rear Derailleur | Short Cage, Black, Alloy & Steel | | Item Weight | 10.4 ounces | | Manufacturer | microSHIFT | | Manufacturer Part Number | RD-M21SS | | Material Type | Multi | | Model Number | RD-M21SS | | Mount Type | Braze-On Mount | | Number of Items | 1 | | Number of Teeth | 32 | | Unit Count | 1 Count | | Warranty Description | Limited Warranty | ## Product Details - **Brand:** microSHIFT - **Color:** Black - **Item Weight:** 10.4 ounces - **Material:** Multi - **Mounting Type:** Braze-On Mount ## Images ![microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black - Image 1](https://m.media-amazon.com/images/I/51eT-4kA5wL.jpg) ## Frequently Bought Together - microSHIFT M21 Rear Derailleur - 6,7 Speed, Super Short Cage, Black - Bike Chain Kit, Single/6/7/8/9/10/11/12 Speed Multi-Function Bike Mechanic Repair Kit, Chain Breaker and Bike Link Plier with Hook and 6 Pairs Bicycle Buckle, Reusable (6/7/8 Speed Bike Chain Kit) - Thinvik 6/7/8 Bike Speed Freewheel 14-28T/14-34T/13-34T,Bicycle Freewheel,Multiple Freewheel,Bike Sprocket --- ## 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.com.au/products/204469439-microshift-m21-rear-derailleur-6-7-speed-super-short-cage](https://www.desertcart.com.au/products/204469439-microshift-m21-rear-derailleur-6-7-speed-super-short-cage) --- *Product available on Desertcart Australia* *Store origin: AU* *Last updated: 2026-11-03*