--- product_id: 399120995 title: "7708CB Garage Door Opener Rail Extension Kit, Other, Regular" brand: "chamberlain" price: "฿4310" currency: THB in_stock: true reviews_count: 5 category: "Chamberlain" url: https://www.desertcart.co.th/products/399120995-7708cb-garage-door-opener-rail-extension-kit-other-regular store_origin: TH region: Thailand --- # 8ft chain drive extension All-in-one quick install kit 1-year warranty backed 7708CB Garage Door Opener Rail Extension Kit, Other, Regular **Brand:** chamberlain **Price:** ฿4310 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your garage game with effortless power and precision! ## Quick Answers - **What is this?** 7708CB Garage Door Opener Rail Extension Kit, Other, Regular by chamberlain - **How much does it cost?** ฿4310 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/399120995-7708cb-garage-door-opener-rail-extension-kit-other-regular) ## Best For - chamberlain enthusiasts ## Why This Product - Trusted chamberlain brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Alloy Steel Build:** Crafted from premium alloy steel for long-lasting strength and silent performance. - • **Trusted Chamberlain Quality:** From North America’s leading garage door opener brand, rigorously tested for dependable use. - • **Complete Warranty Protection:** Enjoy peace of mind with a full one-year warranty covering your investment. - • **Seamless 8-Foot Compatibility:** Perfectly engineered for 8-ft garage doors to ensure smooth, reliable operation every time. - • **Effortless Quick-Install Setup:** Includes extension rail, replacement chain, hardware & manual for a hassle-free upgrade in minutes. ## Overview The Chamberlain 7708CB Rail Extension Kit is a must-have upgrade for 8-foot high garage doors using Chamberlain chain drive openers. Featuring a durable alloy steel rail and replacement chain, this all-in-one kit ensures smooth, quiet operation and quick installation. Backed by a one-year warranty and Chamberlain’s trusted quality, it’s the perfect solution to extend your garage door opener’s reach and reliability. ## Description The Chain Drive Rail Extension Kit for 8'-High Garage Doors is required for reliable, everyday operation of Chamberlain chain drive models in 8-ft. garage door applications. Featuring a quick-install extension rail and replacement chain, the kit includes everything needed for quick and easy installation.Includes one-year warranty, rail extension, replacement chain, all necessary hardware and an instruction manual for easy setup. Review: Easy addon if your garage is an 8 FOOT GARAGE. Parts inside this box fit perfect to the parts in the garage door box. It is a SHAME that I had to throw away the chain that came with the garage door opener. Seems like a waste. Not a friendly green option. CHAMBERLAIN should have a free return option and maybe even a small credit. No where is it obvious that you need this kit if you garage is an 8 foot garage door. Stumbled onto it when reading the comments from previous desertcartians who purchased the garage door itself. Review: Me sorprendió la calidad de los materiales, me ahorre una buena lana comprándolo por aquí, su funcionamiento es silencioso, se puede manejar desde el celular, lo puse en un portón corredizo de madera con metal de casi 4 mts tenia temor de que se forzara el motor por lo pesado pero no, de echo en la aplicación del cel te informa si se esta forzando o no y hace un análisis de su funcionamiento. ## Features - Fully compatible: the Chain Drive Rail Extension Kit for 8'-High Garage Doors is required for reliable, everyday operation of Chamberlain chain drive models in 8-ft. garage door applications. - Easy Setup: featuring a quick-install extension rail and replacement chain, the kit includes all necessary hardware and instructions for a quick and easy installation. - Includes one-year warranty, rail extension, replacement chain, all necessary hardware and an instruction manual for easy setup. - Proven quality: rigorous quality testing ensures lasting performance. - About Chamberlain: the largest and most dependable garage door opener manufacturer in North America. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000H6KC9G | | Batteries Required? | No | | Batteries included? | No | | Colour | Other | | Customer Reviews | 4.5 4.5 out of 5 stars (652) | | Date First Available | 6 Aug. 2012 | | Finish | Unfinished | | Included Components | Chain Drive Garage Door Opener Extension Kit (8ft) | | Item Package Quantity | 1 | | Item Weight | 2.18 kg | | Item model number | 7708CB | | Manufacturer | Chamberlain | | Material | Alloy Steel | | Measurement System | Metric | | Number of Pieces | 1 | | Part Number | 7708CB | | Product Dimensions | 97.79 x 7.62 x 5.08 cm; 2.18 kg | | Shape | Rectangular | | Size | Regular | | Special Features | Keyless | | Style | Modern | ## Product Details - **Brand:** CHAMBERLAIN - **Item dimensions L x W x H:** 97.8 x 7.6 x 5.1 centimetres - **Lock type:** Digital Lock or Electromechanical Lock - **Material:** Alloy Steel - **Special feature:** Keyless ## Images ![7708CB Garage Door Opener Rail Extension Kit, Other, Regular - Image 1](https://m.media-amazon.com/images/I/61091mgV-7L.jpg) ## Questions & Answers **Q: Can I use my old chain drive rail extensions from genie brand?** A: Thank you for your inquiry. Unfortunately, the old rail extensions, from your Genie opener, will not work with our Chamberlain brand garage door openers. If you need further assistance, please visit us at support.chamberlaingroup.com **Q: Does this fit the chamberlin c2102 garage door opener?** A: Thank you for your inquiry. The 7708CB-P, chain drive rail extension kit, will work on a C2102, for an 8-ft. garage door application. **Q: Will this work on craftsman 9.53930DM** A: Yes, this will work as an extension for your Craftsman Chain Drive. **Q: Is this 7708cb-p equvilent to the craftsman 53728 ?** A: No, the 7708CB-P is a chain drive extension kit, and the 53728 is for a belt drive extension kit. Thank you! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by G***M on 5 April 2025* Easy addon if your garage is an 8 FOOT GARAGE. Parts inside this box fit perfect to the parts in the garage door box. It is a SHAME that I had to throw away the chain that came with the garage door opener. Seems like a waste. Not a friendly green option. CHAMBERLAIN should have a free return option and maybe even a small credit. No where is it obvious that you need this kit if you garage is an 8 foot garage door. Stumbled onto it when reading the comments from previous Amazonians who purchased the garage door itself. ### ⭐⭐⭐⭐⭐ Review *by T***S on 2 March 2023* Me sorprendió la calidad de los materiales, me ahorre una buena lana comprándolo por aquí, su funcionamiento es silencioso, se puede manejar desde el celular, lo puse en un portón corredizo de madera con metal de casi 4 mts tenia temor de que se forzara el motor por lo pesado pero no, de echo en la aplicación del cel te informa si se esta forzando o no y hace un análisis de su funcionamiento. ### ⭐⭐⭐⭐⭐ Review *by D***L on 15 April 2023* I followed the installation instructions, everything fit and worked perfectly. Don’t forget to bend the stop tab up before assembly. ## Frequently Bought Together - Chamberlain 7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors - Chamberlain C2405 MYQ Smart Garage Door Opener, Chain Drive, 1/2-HP Motor, Dual Light - Quantity 1 - Decko 24999 Universal Garage Door Opener Hanging/Installation Kit Gray --- ## 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.co.th/products/399120995-7708cb-garage-door-opener-rail-extension-kit-other-regular](https://www.desertcart.co.th/products/399120995-7708cb-garage-door-opener-rail-extension-kit-other-regular) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-27*