Chamberlain Group 8810Cb-P Chamberlain 8810Cb 10-Foot, Compatible Whisper Drive Plus Models, Includes Replacement Belt Garage Door Opener Rail Extension Kit

Like all others, the normal doors are 8 foot. So the extensions should come standard. Works great and easy to install, can be done by one self too.

Muy bien. Sobre todo que el tiempo de entrega su antes de lo prometido

When I tried researching which kit I required and I mistakenly ordered this kit, I assumed that because my door was 8 feet tall, I thought I needed the extra 2 feet was to allow for placement of the motor unit away from the opened door. I also thought that I could combine the rails from the Opener kit and this extension to get the required length I required.I was wrong on both accounts.After assembling to the length I thought I required the belt from the Opener kit was way too short and the belt from this extension kit was way too long.Unlike a Chain door opener where you can remove links to configure the chain to fit a custom application, the belt cannot be adjusted. So I contacted Chamberlain Support for assistance.The way this kit works is,First, yes, it is for doors up to 10 feet tall, but the rails have to be assembled in a specific combination.The combination in order to use this kit is,The front rail (the one with the return wheel) is replaced with the one from this extension kit. Then you use the second rail from the this extension kit and only 3 rails from the Opener kit to complete the assembly. If this is done, the belt will fit. Any other configuration of rails is a no-go.Again, yes, this kit will work with an 8 foot door, all you have to do is adjust the travel to compensate on the opener, but the opener motor is going to be miles away from where you think it should be.If your door is 8 feet tall, the proper kit to buy is the 8 foot extension kit. After finding this out through Chamberlain Support, I bought the 8 foot extension and had a hassle installation. My opener motor is exactly where it needs to be and my 8 foot door opens and closes correctly.The product is good and it is an easy assembly (if you configure the rails correctly). The only reason why I'm posting this is because the description is confusing and it may lead to people ordering the wrong kit.Thank you Amazon for accepting the return of this kit. It is on its way back to you.

Easy install. Worked well with opener to increase size as I moved to a larger door

Our garage door opener stopped working so we needed to purchase a new one along with the extension kit. Everything was there that we required.