--- product_id: 4651957 title: "7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors" brand: "chamberlain group" price: "R2138" currency: ZAR in_stock: true reviews_count: 13 category: "Chamberlain Group" url: https://www.desertcart.co.za/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot store_origin: ZA region: South Africa --- # 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 group **Price:** R2138 **Availability:** ✅ In Stock ## Summary > 🚪 Upgrade your garage game with Chamberlain’s precision extension kit—because your door deserves the best! ## Quick Answers - **What is this?** 7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors by chamberlain group - **How much does it cost?** R2138 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot) ## Best For - chamberlain group enthusiasts ## Why This Product - Trusted chamberlain group brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Crafted from robust steel and rigorously tested for long-term reliability you can trust. - • **Peace of Mind Warranty:** Backed by a 1-year warranty, because quality and support matter. - • **Effortless Installation:** Quick-install extension rail and replacement chain with all hardware and instructions included—get it done fast. - • **Trusted Industry Leader:** From Chamberlain, North America’s most dependable garage door opener manufacturer. - • **Seamless 8-Foot Compatibility:** Perfectly engineered for 8-foot high garage doors to ensure flawless operation. ## 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, extension rail, all necessary hardware, and an instruction manual, ensuring seamless compatibility and reliable daily operation. Backed by a 1-year warranty and Chamberlain’s trusted reputation, this kit guarantees durable performance and easy setup for modern garage door systems. ## 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: They recommended this opener rather than a cheaper model that - I called Chamberlain to ask about a replacement when my previous Lift Master/Chamberlain garage door opener failed after 20 years of service. They recommended this opener rather than a cheaper model that, on paper, should have worked. Chamberlain's customer service was excellent, by the way. This opener went up and worked like a champ first time with only one change to my existing mount points. I had to purchase a length extension because the length of the opener out of the box was too short, even though I was pretty careful to measure everything and compare to what the manufacturer's specs indicated were necessary. After I got the extension added to the opener, which was almost too easy, I moved my mounting point back about three inches from the previous location. I am very well satisfied with this product. ## 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 | | Assembly Required | Yes | | Best Sellers Rank | #107,143 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #98 in Garage Door Opener System Parts | | Brand | Chamberlain Group | | Brand Name | Chamberlain Group | | Color | Other | | Customer Reviews | 4.6 out of 5 stars 670 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 | | Required Assembly | Yes | | Smart Home Compatibility | Not Smart Home Compatible | | Style | Modern | | Style Name | Modern | | UPC | 012381180011 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** CHAMBERLAIN - **Item dimensions L x W x H:** 38.5 x 3 x 2 inches - **Lock Type:** Digital Lock or Electromechanical Lock - **Material:** Alloy Steel - **Special Feature:** Keyless ## 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. ### ⭐⭐⭐⭐⭐ They recommended this opener rather than a cheaper model that *by G***. on December 26, 2015* I called Chamberlain to ask about a replacement when my previous Lift Master/Chamberlain garage door opener failed after 20 years of service. They recommended this opener rather than a cheaper model that, on paper, should have worked. Chamberlain's customer service was excellent, by the way. This opener went up and worked like a champ first time with only one change to my existing mount points. I had to purchase a length extension because the length of the opener out of the box was too short, even though I was pretty careful to measure everything and compare to what the manufacturer's specs indicated were necessary. After I got the extension added to the opener, which was almost too easy, I moved my mounting point back about three inches from the previous location. I am very well satisfied with this product. ### ⭐⭐⭐⭐ 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.co.za/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot](https://www.desertcart.co.za/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-22*