--- product_id: 15977308 title: "RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur" brand: "shimano" price: "S/.647" currency: PEN in_stock: true reviews_count: 11 category: "Shimano" url: https://www.desertcart.pe/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur store_origin: PE region: Peru --- # Aluminum build with sealed bearings Shadow Plus tech for quiet, stable ride 10-speed Dyna-Sys compatibility RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur **Brand:** shimano **Price:** S/.647 **Availability:** ✅ In Stock ## Summary > ⚡ Shift like a pro, ride like a legend. ## Quick Answers - **What is this?** RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur by shimano - **How much does it cost?** S/.647 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/15977308-rd-m640-zee-shadow-plus-10-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 - • **Pro-Level Clutch Control:** Shadow Plus cage tensioner slashes chain bounce and noise for flawless downhill dominance. - • **Low-Profile Stealth Design:** Slim Shadow silhouette minimizes frame contact and keeps your drivetrain sleek and snag-free. - • **Precision 10-Speed Shifting:** Optimized Dyna-Sys cable pull ensures crisp, reliable gear changes every ride. - • **Durable Aluminum Craftsmanship:** Lightweight yet bulletproof aluminum body with sealed bearing pulleys for long-lasting smoothness. - • **Effortless Installation & Compatibility:** Direct mount braze-on design fits seamlessly with Shimano 10-speed mountain drivetrains. ## Overview The Shimano RD-M640 Zee Shadow Plus is a rugged, aluminum 10-speed rear derailleur featuring Shadow Plus technology for reduced chain slap and noise. Designed for Dyna-Sys mountain drivetrains, it offers smooth, precise shifting with sealed bearing pulleys and a low-profile design that enhances durability and performance on demanding trails. ## Description Dyna-Sys specific cable pull for (HG-X) 10 speed mountain drivetrains, improved cable routing, shadow design help eliminate drop out contact. Direct mount frame compatible. Aluminum construction with sealed bearing 11-tooth guide pulley. Shadow plus cage tensioner to help eliminate chain bounce and quiet down the drivetrain. Review: Zee good! - It's awesome to get the same build/design quality of the pro-downhill level derailleurs at a non-pro price. This thing is fairly bulletproof in it's build quality, has a great clutch system to keep my chain from dancing, crazy easy to install with a new chain, and shifts smooth. Being it's not original equipment to my rig, my cassette is such that I have to really watch out for straining my transmission (running a 2x chainring). YES, it's an older bike, but just try and catch me on a downhill. It's not what you have, but how you use it! Review: Best derailleur ever - This was a lot cheaper when I bought it a few years ago. It is just great. Shame how much it costs now. It's almost still worth it. 10 speed Shimano is basically dead but I'm locked in and loving it. Shifts every bit as good as 10 speed 105, and has the clutch. Super low profile too. Almost looks like an 80's derailleur with the tiny cage. Perfect for a suburban commuter or anything else really. I hear it's been discontinued, another terrible decision by the bike industry. ## Features - Shadow Plus technology keeps the low profile shape reducing chainstay and other contact, and adds a chain tensioning device reducing noise and dropped chains - Compatible with Dyna-Sys 10 speed Shimano products - Aluminum construction with sealed bearing pulleys - 4 fluoric coated link pivot bushings for smooth operation - Shimano Reference Number: RD-M640 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007Q4P7UQ | | Best Sellers Rank | #283,696 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #286 in Rear Bike Derailleurs | | Brand | SHIMANO | | Brand Name | SHIMANO | | Case Material Type | Aluminum | | Color | One Color | | Customer Reviews | 4.6 out of 5 stars 227 Reviews | | Global Trade Identification Number | 00689228305328 | | Included Components | Rear Derailleur | | Item Dimensions L x W x H | 13"L x 9.5"W x 5"H | | Manufacturer | Shimano | | Manufacturer Part Number | IRDM640SSW | | Material | Aluminum | | Material Type | Aluminum | | Model Number | 153102 | | Mount Type | Braze-On Mount | | Mounting Type | Braze-On Mount | | Number of Teeth | 25 | | Product Dimensions | 13"L x 9.5"W x 5"H | | UPC | 689228305328 | | Unit Count | 1.0 Count | | Warranty Description | Limited Warranty | ## Product Details - **Brand:** SHIMANO - **Color:** One Color - **Material:** Aluminum - **Mounting Type:** Braze-On Mount - **Product Dimensions:** 13"L x 9.5"W x 5"H ## Images ![RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur - Image 1](https://m.media-amazon.com/images/I/613VHFTmr-L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Zee good! *by E***T on May 22, 2025* It's awesome to get the same build/design quality of the pro-downhill level derailleurs at a non-pro price. This thing is fairly bulletproof in it's build quality, has a great clutch system to keep my chain from dancing, crazy easy to install with a new chain, and shifts smooth. Being it's not original equipment to my rig, my cassette is such that I have to really watch out for straining my transmission (running a 2x chainring). YES, it's an older bike, but just try and catch me on a downhill. It's not what you have, but how you use it! ### ⭐⭐⭐⭐⭐ Best derailleur ever *by B***A on June 5, 2024* This was a lot cheaper when I bought it a few years ago. It is just great. Shame how much it costs now. It's almost still worth it. 10 speed Shimano is basically dead but I'm locked in and loving it. Shifts every bit as good as 10 speed 105, and has the clutch. Super low profile too. Almost looks like an 80's derailleur with the tiny cage. Perfect for a suburban commuter or anything else really. I hear it's been discontinued, another terrible decision by the bike industry. ### ⭐⭐⭐⭐⭐ Great derailer. Great for 20 inch wheel mountain bike. *by T***R on March 20, 2020* we Great derailer. It works with my 34 tooth cassette and 30 tooth chainring. Select the part number for 36 tooth cassette. The photos shows it fitting and a 20 inch wheel diameter kids bike. The cage clears the fat 20x 2.8” tires. The derailer keeps the chain on the gears over bumps even with clutch off. There is a slight increase in pulley friction drag with the clutch on and in the largest cassette gear. So my kid rides with the clutch off. Still is a large decrease in chain slap over the stock derailer. ## Frequently Bought Together - Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur - Shimano SL-M640 Zee 10 Speed Shifter - Shimano HG50 10 Speed Mountain Bike Cassette 11-36T --- ## 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.pe/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur](https://www.desertcart.pe/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-07-05*