--- product_id: 144525197 title: "Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100" brand: "farwind" price: "€ 58.40" currency: EUR in_stock: true reviews_count: 9 category: "Farwind" url: https://www.desertcart.hr/products/144525197-trimmer-gearbox-head-for-stihl-fs55-fs55r-fs55rc-fs56-fs56rc store_origin: HR region: Croatia --- # Lightweight & easy installation Aluminum alloy body for durability 10 teeth, 1 in shaft for universal fit Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 **Brand:** farwind **Price:** € 58.40 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your trimming game with precision and power! ## Quick Answers - **What is this?** Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 by farwind - **How much does it cost?** € 58.40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/144525197-trimmer-gearbox-head-for-stihl-fs55-fs55r-fs55rc-fs56-fs56rc) ## Best For - farwind enthusiasts ## Why This Product - Trusted farwind brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Engineering:** 10 teeth with a 1-inch diameter shaft and square attachment holes for a secure, wobble-free fit. - • **Cost-Effective Upgrade:** Premium OEM replacement at a fraction of the price—save money without compromising quality. - • **Seamless Compatibility:** Fits a wide range of Stihl models ensuring you never miss a beat on your trimming tasks. - • **Effortless Installation:** Lightweight design and flexible mounting make swapping gear heads a breeze—no extra tools needed. - • **Built to Last, Ready to Perform:** Crafted from corrosion-resistant aluminum alloy for unmatched durability and stable operation. ## Overview This Trimmer Gearbox Head is a high-quality OEM replacement part compatible with numerous Stihl FS and FR series models. Featuring a corrosion-resistant aluminum alloy body, a 10-tooth 1-inch shaft, and a lightweight design, it ensures durable, stable performance and easy installation. Perfect for professionals and enthusiasts seeking reliable, cost-effective maintenance for their outdoor power equipment. ## Description desertcart.com: Farwind Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 : Patio, Lawn & Garden Review: Less expensive than actually buying one from still but still good quality - Perfect replacement on my FS 55R no issues very easy to install Review: Good product - As stated from other reviews.... fits perfect, just shield will not fit. ## Features - Replace OEM Part: 4137 640 0100, 4130 640 0100, 4130 641 0300 - Aluminum alloy body, sturdy structure, stable working performance, corrosion-resistant - Light weight, easy to install, flexible for changing mowing blades and trimmer heads, the best alternative to trimmer gearboxes - 10 teeth, 1 in/25.4 mm diameter shaft, square attachment holes, fits most straight shaft trimmers - Compatible with Stihl FS36, FS40, FS44,FS100, FS100R, FS100X, FS100RX, FS110, FS110R, FS110X, FS110RX, FS120, FS120R, FS130, FS130R, FS200, FS200R, FS240, FS240R, FS250, FS250R, FS260, FS260C, FS260RC, FS460C, FS460RC, FS480, FS480C, FR85, FR85T, FR130T, FR220, FR350, FR450, FR460, FR480, FT100, FS-KM ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #177,952 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #3,321 in String Trimmer Replacement Parts | | Customer Reviews | 4.2 out of 5 stars 165 Reviews | ## Images ![Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - Image 1](https://m.media-amazon.com/images/I/61pU2On-1JL.jpg) ![Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - Image 2](https://m.media-amazon.com/images/I/61xdLXUuRPL.jpg) ![Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - Image 3](https://m.media-amazon.com/images/I/61O7KbNQUdL.jpg) ![Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - Image 4](https://m.media-amazon.com/images/I/61zvaPHO3IL.jpg) ![Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - Image 5](https://m.media-amazon.com/images/I/61O4Uvs+0IL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Less expensive than actually buying one from still but still good quality *by D***M on July 15, 2025* Perfect replacement on my FS 55R no issues very easy to install ### ⭐⭐⭐⭐⭐ Good product *by K***R on May 10, 2022* As stated from other reviews.... fits perfect, just shield will not fit. ### ⭐⭐⭐⭐ Working good *by J***E on May 24, 2026* It’s working pretty good. Just make sure to grease it up after installing ## Frequently Bought Together - Farwind Trimmer Gearbox Head for Stihl FS55 FS55R FS55RC FS56 FS56RC FS80 FS85 FS90 FS90R FS94 FS94R FS100RX FS110 FS120 FS130 FS130R FS240 FS240R FS250 FS-KM Gear Head 4137 640 0100 - AILEETE 25-2 Bump Feed Trimmer Head 4002 710 2108 for Stihl FS55 FS55R FS56 FS56RC FS70 FS70R FS80 FS85 FS90 FS90R FS91R FS94R FS100RX FS110 FS111RX FS120 FS130 FS131 FS240, Replaces 4002 710 2191 - AILEETE C26-2 Dual Line Trimmer Head 4002 710 2169 for Stihl FS55 FS55R FS56 FS56RC FS70 FS70R FS80 FS85 FS90 FS90R FS91 FS94 FS110 FS120 FS130 FS131 FS131R FS240 FS250 Brushucutters --- ## 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.hr/products/144525197-trimmer-gearbox-head-for-stihl-fs55-fs55r-fs55rc-fs56-fs56rc](https://www.desertcart.hr/products/144525197-trimmer-gearbox-head-for-stihl-fs55-fs55r-fs55rc-fs56-fs56rc) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-09*