--- product_id: 4651957 title: "7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors" brand: "chamberlain" price: "€ 101.02" currency: EUR in_stock: true reviews_count: 13 category: "Chamberlain" url: https://www.desertcart.hr/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot store_origin: HR region: Croatia --- # Fits 8-ft high doors perfectly Quick-install hardware included Alloy steel durability 7708CB-P Chain Drive Rail Extension Kit for 8 Foot High Garage Doors **Brand:** chamberlain **Price:** € 101.02 **Availability:** ✅ In Stock ## Summary > 🚪 Upgrade your garage game with Chamberlain’s precision extension kit — because your 8-foot door deserves the perfect fit! ## 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?** € 101.02 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/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 - • **Trusted Brand with Warranty:** Backed by Chamberlain’s 1-year warranty and decades of industry-leading expertise. - • **Seamless 8-Foot Compatibility:** Specifically engineered for 8-foot high garage doors to ensure flawless operation without guesswork. - • **Effortless Quick-Install Setup:** Includes all hardware and clear instructions for a fast, hassle-free extension installation. - • **Durable Alloy Steel Construction:** Built to last with premium alloy steel, delivering strength and reliability you can trust every day. - • **Complete Kit with Replacement Chain:** Everything you need in one box—rail extension, replacement chain, and mounting hardware for a perfect fit. ## Overview The Chamberlain 7708CB-P Chain Drive Rail Extension Kit is a precision-engineered solution designed to extend Chamberlain chain drive garage door openers for 8-foot high doors. Crafted from durable alloy steel, this kit includes a quick-install rail extension, replacement chain, all necessary hardware, and an instruction manual, ensuring a seamless and reliable upgrade. Backed by a 1-year warranty and Chamberlain’s trusted reputation, it guarantees lasting performance and easy installation for professional-grade garage door operation. ## 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 | | Additional Features | Keyless | | Best Sellers Rank | #85,615 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #73 in Garage Door Opener System Parts | | Brand Name | CHAMBERLAIN | | Color | Other | | Control Method | App | | Controller Type | Hand Control | | Customer Reviews | 4.6 4.6 out of 5 stars (667) | | Finish Types | Unfinished | | Global Trade Identification Number | 00012381180011 | | Included Components | Rail extension, replacement chain, all necessary hardware, instruction manual | | Item Dimensions | 38.5 x 3 x 2 inches | | Item Type Name | Garage Door Opener Rail Extension Kit | | Item Weight | 4.8 Pounds | | Lock Type | Digital Lock or Electromechanical Lock | | Manufacturer | Chamberlain | | Manufacturer Warranty Description | 1 Year | | Material Type | Alloy Steel | | Model Number | 7708CB | | Recommended Uses For Product | Extending the rail of Chamberlain chain drive garage door openers in 8-ft. high garage doors | | Shape | Rectangular | | 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.hr/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot](https://www.desertcart.hr/products/4651957-7708cb-p-chain-drive-rail-extension-kit-for-8-foot) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-26*