We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Garage door opener rail extension kit with chain and hardware, silver metal finish

TAURKENAM

TAURKENAM 7708CB Power Adapter 12 Ft

SKU CH-TGCT-TXAP2

Chain-drive rail extension kit adds 12 ft of travel for 8 ft high garage doors and includes replacement chain plus hardware

  • Compatible with 8-ft Chamberlain chain drive openers for reliable operation
  • Quick-install extension rail and replacement chain simplify the setup process
  • All required hardware and an instruction manual are included in the kit
  • Rigorous quality testing backs long-lasting performance
  • Backed by Chamberlain, North America's largest garage door opener manufacturer

Chamberlain 7708CB Rail Extension Kit

The Chamberlain 7708CB kit extends a chain-drive opener rail so it works with an 8-ft. high garage door. It is intended for owners of compatible Chamberlain chain-drive models who need the extra length for proper door travel.

Practical limits of the chain-drive system

The extension is required only when the door height reaches eight feet; standard rails will not provide reliable everyday operation at that height. Correct backset, cross-bore and door thickness must be measured before purchase to confirm the kit matches the installation.

Installation experience

The package supplies a quick-install extension rail, replacement chain, all necessary hardware and an instruction manual for straightforward setup. The most common issue is ordering the kit without first verifying the door's backset, cross-bore and thickness, which leads to fitment problems.

How it compares

Measured against everything we stock in AC Adapters & Power Bricks, at today’s prices. Recalculated every night.

Price $88.99
Pricier than about 90% of the 3,875 comparable items (median $23.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

Which Chamberlain chain drive models does the 7708CB rail extension kit fit?

The kit is designed for Chamberlain chain drive openers that operate 8-foot-high garage doors.

What does the 12 ft rail length mean once installed on an 8-foot door?

It extends the existing rail so the opener can reach the full height of an 8-ft door without binding.

What connection standard does the extension rail use with the original opener?

It attaches directly to the Chamberlain chain drive rail system using the included hardware.

More in AC Adapters & Power Bricks

Similar items