In the industry, we call these Center Mount (Trolley) and Side Mount (Jackshaft) openers. Each has a specific purpose, and choosing the right one depends entirely on your garage’s layout and how you use the space.

Here is the breakdown of how these two systems differ:

Side Mount Opener:

Best For - Standard garages and budget-conscious builds
Mounting Location - Ceiling (middle of garage)
Noise Level - Quiet to Moderate
Ceiling Space - Occupied by rail/motor
Price Range - Economy to Mid ($200 - $700)

Center Mount Opener:

Best For - High ceilings, car lifts, or quiet operation
Mounting Location - Wall (beside the door)
Noise Level - Ultra-Quiet (DC Motor)
Ceiling Space - Completely Open
Price Range - Premium ($650 - $1150)

The Center Mount Opener: The Reliable Standard

This is the "classic" garage door opener. It uses a long rail that stretches from your wall to a motor hanging in the center of your ceiling. A "trolley" moves along that rail to push or pull the door open.

Why Choose a Center Mount?

Affordability: These are generally more budget-friendly and easier to find replacement parts for.
Versatility: They work with almost any door type, including those with extension springs or low-headroom setups.
Lighting: Because they sit in the middle of the room, many models (like the Chamberlain B6753T come with massive LED light panels that double as your primary garage lighting.

The Side Mount Opener: The Modern Powerhouse

Also known as a Jackshaft opener, this unit mounts directly to the wall on either the left or right side of your garage door. It connects straight to your torsion bar to rotate the shaft and lift the door.

Why Choose a Side Mount?

Reclaim Your Ceiling: Without a rail in the middle of the room, you can install overhead storage racks, brighter light fixtures, or even a car lift.
Whisper Quiet: Because they are mounted to the wall rather than the ceiling joists, they don't vibrate the floor of the bedroom directly above the garage.
High-Lift Compatibility: If you have a "high-lift" door that travels way up the wall before turning, a side mount is often your only (and best) option.
Enhanced Security: Many models, like the LiftMaster 8500W, come with an automatic deadbolt that locks the door every time it closes.

Which One Is Right For Your Door?

Center Mount if: You have a standard ceiling height, you’re looking for the best value, or you want the opener to be your main source of garage light.

Side Mount if: You want a "clean" look, you need extra overhead storage, you have a room above the garage, or you’re planning on turning your garage into a gym or workshop.

Ready to Upgrade?

At Element Doors and Garages, we install both systems daily. We can help you measure your side-room clearance and ceiling height to ensure you get a motor that lasts for years.

Side Mount vs. Center Mount Garage Door Openers