--- product_id: 148016667 title: "Shimano SLX RD-M7100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x | rear-bike-derailleurs" brand: "shimano" price: "$168.96" currency: USD in_stock: true reviews_count: 12 category: "Shimano" url: https://www.desertcart.us/products/148016667-shimano-slx-rd-m7100-sgs-rear-derailleur-12-speed-long store_origin: US region: United States of America --- # Aluminum durable build 12-speed precision gearing Impact-resistant pulley bumper Shimano SLX RD-M7100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x | rear-bike-derailleurs **Brand:** shimano **Price:** $168.96 **Availability:** ✅ In Stock ## Summary > ⚡ Shift like a pro, ride like you own the trail. ## Quick Answers - **What is this?** Shimano SLX RD-M7100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x | rear-bike-derailleurs by shimano - **How much does it cost?** $168.96 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/148016667-shimano-slx-rd-m7100-sgs-rear-derailleur-12-speed-long) ## 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 - • **Rugged Durability:** Aluminum construction with protective bumper guards against trail hazards. - • **Stabilizer Switch Tech:** Eliminates chain slap and drops for smooth, confident rides on rough trails. - • **Advanced Chain Management:** Larger 13-tooth pulley wheel reduces chain tension and boosts efficiency. - • **Extended 51-Tooth Capacity:** Conquer steep climbs and long rides with an expanded cassette range. - • **Effortless 12-Speed Shifting:** Experience crisp, reliable gear changes optimized for any terrain. ## Overview The Shimano SLX RD-M7100 Rear Derailleur is a robust, 12-speed mechanical drivetrain component designed for serious riders. Featuring a long cage with a 51-tooth cassette capacity, a durable aluminum build, and advanced Shadow Plus technology, it delivers precise shifting, enhanced chain stability, and impact protection. Ideal for demanding mountain biking conditions, it balances high performance with mid-range value, making it a trusted workhorse for both rugged climbs and fast descents. ## Description SLX drivetrains seem to be an afterthought. We get it — XT and XTR are flashy and featherweight, but when it comes to workhorse components, SLX is damn near impossible to beat. Thankfully, it also comes along with trickle-down technology from its pricier siblings, and it's easy to see with the new SLX RD-M7100 Rear Derailleur that's optimized with 12-speed technology, crisp shifting, and sleek graphics that elevate standards far above what we think of when we talk about mid-range groupsets. It comes ready to take on the big-guns, with a 51-tooth capacity (a whopping 10 extra teeth above the previous version), and the flexibility to run both of Shimano's 12-speed cassette offerings. The new SLX rear derailleur features a larger, 13-tooth pully wheel for an increase in efficiency and chain management while you're riding. This partners up with advance shifting performance to deliver decreased tension when you're in the big rings. More changes happened to the pulley cage, with an added bumper that protects your pulley wheel from impacts with rocks and branches — an appreciated feature with the extra length that the derailleur hosts in order to accommodate all 12 cogs. The derailleur is built to accommodate both of Shimano's new 12-speed cassettes, the 10-51t, or 10-45t cassttes, so you can find the right gearing for your ride, regardless of you're charging full-speed through smooth ribbons of single track, or crunching up steep, seemingly endless fire roads on sky-high enduro climbs. One thing that we're thankful has stayed the same through the generations is the stabilizer switch that we saw trickling down from XT and 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 M7100 keeps a good thing going with some of the previous model's improvements, including th... Review: Great product for Colorado - This is my second SLX after 2.5 years of riding the first one purchased from bike shop. Had to buy a second because I purchased a new cassette. Product came quickly, was perfect out of box and the install at a bike shop worked went great! The SLX riding provides excellent range of gears for riding on the front range of Colorado and the high mountains. It’s a better than average product for the price point. Review: Genuine made in japan - New original in retail package made in japan ## Features - Material: aluminum - Pull Type: mechanical - Cage Length: long - Cassette Range: 10 - 51t - Gearing: 1 x 12 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07VFBM4FN | | Best Sellers Rank | #147,064 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #95 in Rear Bike Derailleurs | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Aluminum | | Color | Black | | Customer Reviews | 4.5 out of 5 stars 140 Reviews | | Included Components | Rear Derailleur | | Item Dimensions L x W x H | 13"L x 9.5"W x 5"H | | Item Type Name | Rear Derailleur | | Item Weight | 0.91 Pounds | | Manufacturer | Shimano | | Manufacturer Part Number | IRDM7100SGS | | Material | Multi | | Material Type | Multi | | Model Number | Shimano | | Mount Type | Braze-On Mount | | Mounting Type | Braze-On Mount | | Number of Teeth | 51 | | Product Dimensions | 13"L x 9.5"W x 5"H | | UPC | 192790444253 | | Unit Count | 1.0 Count | | Warranty Description | Limited Warranty | ## Product Details - **Brand:** SHIMANO - **Color:** Black - **Item Weight:** 0.91 Pounds - **Material:** Multi - **Mounting Type:** Braze-On Mount ## Images ![Shimano SLX RD-M7100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x | rear-bike-derailleurs - Image 1](https://m.media-amazon.com/images/I/61TZzHEIo6L.jpg) ## Questions & Answers **Q: Is this the 51t max cog version?** A: Mine worked fine with the 51t cassette. **Q: Will this work with a Sram Eagle 12-speed cassette?** A: Yes. I have used mine with a SRAM 12 speed cassette for the past 1.5 years. Works very well. **Q: Work for 2022 poligon sisuk T8?** A: I have a 2021 but I don’t think there are any differences. That said, yes, it did work for me. I also had a bent hanger, so I had to address that as well. **Q: Is it clutched?** A: The clutch is the worst part. It requires service about once a month. If you bought this already, and if you see your chain go slack on a ride, turn off the clutch, and it works as a non-clutch derailleur. Good enough to limp home, but you will suffer chain slaps and maybe chain drops. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product for Colorado *by K***M on March 25, 2026* This is my second SLX after 2.5 years of riding the first one purchased from bike shop. Had to buy a second because I purchased a new cassette. Product came quickly, was perfect out of box and the install at a bike shop worked went great! The SLX riding provides excellent range of gears for riding on the front range of Colorado and the high mountains. It’s a better than average product for the price point. ### ⭐⭐⭐⭐⭐ Genuine made in japan *by R***L on December 28, 2025* New original in retail package made in japan ### ⭐⭐⭐⭐⭐ It’s good *by J***N on May 12, 2025* Got this as a spare great quality ## Frequently Bought Together - SHIMANO SLX Rd-M7100 Rear Derailleur Black, Sgs, 12-Speed - Shimano SLX CN-M7100 Chain - 12-Speed, 126 Links, Silver --- ## 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/148016667-shimano-slx-rd-m7100-sgs-rear-derailleur-12-speed-long](https://www.desertcart.us/products/148016667-shimano-slx-rd-m7100-sgs-rear-derailleur-12-speed-long) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-29*