--- product_id: 4651957 title: "7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors" brand: "chamberlain" price: "AR$214313" currency: ARS in_stock: true reviews_count: 13 category: "Chamberlain" url: https://www.desertcart.com.ar/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot store_origin: AR region: Argentina --- # Complete hardware kit included Quick-install rail extension Steel build for durability 7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors **Brand:** chamberlain **Price:** AR$214313 **Availability:** ✅ In Stock ## Summary > 🚪 Elevate your garage game with Chamberlain’s seamless 8-foot extension! ## Quick Answers - **What is this?** 7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors by chamberlain - **How much does it cost?** AR$214313 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot) ## 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 - • **Effortless Installation:** Quick-install extension rail and replacement chain with all hardware and instructions included. - • **Durable Steel Construction:** Built from premium steel for long-lasting strength and reliability. - • **Trusted Chamberlain Quality:** Backed by rigorous testing and a 1-year warranty for peace of mind. - • **Seamless 8-Foot Compatibility:** Perfectly engineered for 8-foot garage doors to ensure flawless operation. - • **Smart Upgrade for Your Garage:** Avoid installation delays—get the exact extension kit designed for your taller door. ## Overview The Chamberlain 7708CB-P Chain Drive Rail Extension Kit is a steel-built, quick-install solution designed specifically for 8-foot high garage doors. It includes a replacement chain, rail extension, all necessary hardware, and an instruction manual, ensuring reliable daily operation of Chamberlain chain drive models. Backed by a 1-year warranty and Chamberlain’s trusted quality, this kit is essential for anyone upgrading or installing a garage door opener on taller doors. ## Description Product 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. From the Manufacturer Chamberlain 7708CB 8-Foot Chain Drive Extension Kit Review: Works great but a shame to trash chain that was purchased in the box - 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: Works fine, great value - Exactly what was needed to install our new chamberlain for an 8 ft door. Much, much better price than a big box hardware store. Please note that the rails and chain shipped with new chamberlains are for 7 foot doors. If your garage door is taller, you will need the appropriate extension kit. ## 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..Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. - 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 | | Best Sellers Rank | #103,920 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #108 in Garage Door Opener System Parts | | Brand | CHAMBERLAIN | | Brand Name | CHAMBERLAIN | | Color | Other | | Customer Reviews | 4.6 out of 5 stars 674 Reviews | | Global Trade Identification Number | 00012381180011 | | Included Components | Rail extension, replacement chain, all necessary hardware, instruction manual | | Item Type Name | Garage Door Opener Rail Extension Kit | | Item Weight | 4.8 pounds | | Manufacturer | Chamberlain | | Manufacturer Part Number | 7708CB | | Manufacturer Warranty Description | 1 Year | | Material | Steel | | Material Type | Steel | | Model Number | 7708CB | | Number of Items | 1 | | Number of Packs | 1 | | Style | Modern | | Style Name | Modern | | UPC | 012381180011 | | Unit Count | 1 Count | ## Product Details - **Brand:** CHAMBERLAIN - **Color:** Other - **Item Weight:** 4.8 pounds - **Material:** Steel - **Style:** Modern ## Images ![7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors - 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 ### ⭐⭐⭐⭐⭐ Works great but a shame to trash chain that was purchased in the box *by G***M on April 5, 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. ### ⭐⭐⭐⭐⭐ Works fine, great value *by D***8 on January 31, 2019* Exactly what was needed to install our new chamberlain for an 8 ft door. Much, much better price than a big box hardware store. Please note that the rails and chain shipped with new chamberlains are for 7 foot doors. If your garage door is taller, you will need the appropriate extension kit. ### ⭐⭐⭐⭐ Worked great! *by P***P on November 2, 2024* I have to wonder why the company does not sell a 7 ft. model and an 8 ft. model. Lots of extra parts were purchased just to get the extension. Anyone need a brand new in the box chain for a seven-foot door? Just a waste of resources. ## 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.com.ar/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot](https://www.desertcart.com.ar/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-15*