--- product_id: 158810962 title: "SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black" brand: "shimano" price: "€ 196.61" currency: EUR in_stock: true category: "Shimano" url: https://www.desertcart.gr/products/158810962-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed store_origin: GR region: Greece --- # Aluminum long cage durability 12-speed precision shifting 41t max cassette capacity SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black **Brand:** shimano **Price:** € 196.61 **Availability:** ✅ In Stock ## Summary > ⚡ Shift Faster, Ride Harder, Own Every Trail! ## Quick Answers - **What is this?** SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black by shimano - **How much does it cost?** € 196.61 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/158810962-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed) ## 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 - • **Maximized Gear Range:** Handle steep climbs and rapid descents effortlessly with a massive 10-51t cassette compatibility. - • **Shadow RD+ Stability:** Keep your chain locked in place and silence chain slap with Shimano’s proven low-profile stabilizer tech. - • **Rugged Aluminum Build:** Lightweight yet tough aluminum construction ensures long-lasting performance on every trail. - • **Direct Cable Path Design:** Cleaner, more reliable shifting with reduced contamination risk thanks to the innovative cable routing. - • **Next-Level 12-Speed Shifting:** Experience ultra-smooth, lightning-fast gear changes with Shimano’s latest 12-speed drivetrain tech. ## Overview The SHIMANO XT RD-M8100-SGS is a premium 12-speed long cage rear derailleur crafted from durable aluminum, designed for 1x drivetrains. It supports wide-range cassettes up to 10-51t, features a larger 13-tooth pulley for faster, quieter shifts, and incorporates Shadow RD+ technology to minimize chain slap and enhance stability on rugged terrain. Ideal for serious mountain bikers seeking reliable, high-performance gear control. ## Description Product Description It's been a little while since we've seen an update to Shimano's coveted XT group. In fact, the last time we saw big changes was when things shifted to 11-speed, which should make it no shock at all that Shimano's new XT RD-M8100 Rear Derailleur comes along with the launch of 12-speed XT. The new derailleur packs in a new, larger 13-tooth pulley, and carries on with the proven Shadow RD+ low-profile tech that keeps things tucked out of harm's way when the trail gets loose, wily, and filled with menacing boulders hungry to take a bite out of bike components. The new derailleur comes in two versions, the M8100 and M8120. This particular model is built for one-by drivetrains, to be paired up with Shimano's new 12-speed cassette. It's capable of running both the 10-45t and 10-51t cassette, but won't fair well if you're hoping to run a two-by crank setup. The derailleur brings a new level of silence to the drivetrain thanks to decreased tension in the lower gear positions, plus an added bumper on the pulley cage. The shifting is a bit faster than on the 8000-series derailleur thanks in part to the larger pulley. One thing that we're thankful has stayed the same through the generations is the stabilizer switch that we saw trickling down from XTR in the previous model. When engaged, this switch helps to eliminate chain slap and dropped chains by increasing spring tension. This is a valuable option for suspension systems that require chainstays and pivots located close to the rear derailleur. The RD M8100 keeps a good thing going with some of the previous model's improvements, including the direct cable path. Your shift housing can enter the stop on the derailleur without the traditional loop of excess housing that often was the victim of contamination in yester-years. Shimano sticks with the old-reliable aluminum components in the XT derailleur. All of the linkage plates, knuckles, and cage sides are made from it, so while it may lack the carbon-fiber-laden aesthetic... Legal Disclaimer 2009906(012 089)1/23 102221(5 3/31 ## Features - Material: aluminum - Capacity: (GS) 35t [SGS] 41t - Cassette Range: [GS] 10-45t, [SGS] 10-51t - Gearing: 1 x 12 - Compatibility: Shimano 12-speed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09233PFZ4 | | Best Sellers Rank | 27,767 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 23 in Bike Rear Dérailleurs | | Brand Name | SHIMANO | | Case Material Type | Aluminium | | Colour | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (583) | | Item Dimensions L x W x H | 25.4L x 15.2W x 15.2H centimetres | | Item Type Name | Rear Derailleur | | Item Weight | 281 g | | Manufacturer | Shimano | | Manufacturer Part Number | IRDM8100GS | | Material Type | Aluminium | | Model Number | Shimano | | Mount Type | Clamp-On Mount | | Number of Items | 1 | | Number of Teeth | 26 | | UPC | 192790897097 | ## Product Details - **Brand:** SHIMANO - **Colour:** Black - **Item weight:** 281 g - **Material:** Aluminium - **Mounting type:** Clamp-On Mount ## Images ![SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black - Image 1](https://m.media-amazon.com/images/I/51K46DNzSPL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black - Shimano XT SL-M8100-L Right Clamp-Band 12-Speed Shifter, Black - SHIMANO Xt Cs-M8100 12-Speed Cassette --- ## 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.gr/products/158810962-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed](https://www.desertcart.gr/products/158810962-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-02*