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Chain Drive Rail Extension Kit for 8' Garage Doors

Article #07645045 Model #G7708CB-P Format 8'
This item is not currently available for immediate purchase, but can be ordered by visiting the selected store. Orders typically take 3-7 days from date of order to be received at your selected store.

Chain Drive Rail Extension Kit for 8' Garage Doors

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Description

Includes a quick-install extension rail and replacement chain. Easy installation. Limited one year warranty.

Product specifications

Width
3" (7.62 cm)
Type
Extension rail
Style
Chain drive
Model
Chamberlain
Color
Black
Length
38.5" (97.5 cm)
Depth
2" (5.08 cm)
Included
Hardware
Warranty
1-year limited warranty
Packaging
Each
Weight
6 lbs (2.72 kg)

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Would this help open a 9' door?

Asked by: Bozica
For a 9ft door, we recommend our 10ft rail extension kit.
Answered by: TheChamberlainTeam
Date published: 2018-11-14

Is this extension kit compatible with Craftsman Chain drive openers

Asked by: 3dfam
Yes, the extension kit will fit on your Craftsman opener, provided you are using square type rails.
Answered by: TheChamberlainTeam
Date published: 2018-08-03
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Chain Drive Rail Extension Kit for 8' Garage Doors is rated 4.4 out of 5 by 9.
Rated 5 out of 5 by from This is a CHAIN rail extension. The review with 1 star is for a belt extension kit. This is a chain extension. Belt drives and chain drives are not the same. I had little issue with this extension on my CHAIN opener for my 8' door.
Date published: 2016-10-03
Rated 5 out of 5 by from Must have for tall doors This extension kit is a must have for tall garage doors. The kit contains everything needed to convert the shorter rail system to the correct length. New, longer, chain is included and was easy to assemble. [This review was collected as part of a promotion.]
Date published: 2019-06-19
Rated 5 out of 5 by from Easy to install While installing my new garage door opener i discovered i needed an extension kit because my door was over 7 feet. the extension kit fit perfectly and everything worked the first time [This review was collected as part of a promotion.]
Date published: 2019-02-26
Rated 2 out of 5 by from Costly and iffy extension When our old garage door opener quit I bought a Chamberlain Whisper Drive at Lowe's. Since one only replaces garage door openers every decade or two, it did not occur to me that there may be different types for different garage doors. My door apparently is taller than average, and so I found that I needed an 8-foot extension kit to make the Chamberlain opener work for me. The local Lowe's had the kit, at a princely cost of US$47. The kit contained a metal extension piece, a longer belt and a few small pieces. The belt and some of the pieces replaced the belt and pieces that came with the standard opener. Installation was not difficult as long as you followed the (very good) manual closely. However, the extension added yet another modular length to the rail of the Chamberlain opener, adding another "klunk" sound to the succession of klunks whenever the opener is operated and runs over its rail. It seems to make little sense to offer a belt-driven "Whisper" drive that then makes so much noise running over the modular rail. Another problem with the extension is that it adds more length to the belt which doesn't have any guide and tends to droop even when properly tensioned. With the stock tensioning, the belt flopped around during operation, and I had to tension it significantly harder than stock. To add to the misery, two days after I bought this $47 piece extension, Lowe's lowered the price to $35...
Date published: 2015-07-28
Rated 3 out of 5 by from Waste of parts. Overall it’s a excellent product, but I don’t think they should just make an 8ft extension, whenever most people only need 1-2ft for a taller door. So of course there is the waste of product and money which the customer ends up paying for. [This review was collected as part of a promotion.]
Date published: 2019-10-26
Rated 5 out of 5 by from Good extension rail kit. This fits most Chamberlain chain drive openers. I needed this for an 8 ft. door. Get a friend and take your time during installation. Read the directions and you'll be just fine. [This review was collected as part of a promotion.]
Date published: 2019-02-26
Rated 5 out of 5 by from Excellent The extension installed easily on a 100 plus year old building. It is not an overhead door. It slides sideways and runs smoothly and quietly. [This review was collected as part of a promotion.]
Date published: 2018-10-25
Rated 5 out of 5 by from For 8' door height As easy as it could be - very self-explanatory. Works perfectly. It just provides an extra foot of travel for an 8' door. [This review was collected as part of a promotion.]
Date published: 2019-06-17
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