Full-motion TV wall mounts typically extend 15 to 25 inches from the wall, while long-arm models reach 28 to 40 inches and specialty products advertise up to 47 inches.
Extension is measured from the wall plate to the TV’s rear mounting area, so the reach you read in a spec sheet is not the distance to the screen’s front edge. That gap matters when you are trying to swing a big panel past a corner without clipping the drywall. Below is what each mount class actually delivers, plus the numbers that decide whether a long arm will hold.
How Far Do Standard Full-Motion Mounts Reach?
Most full-motion mounts land in the 15 to 25 inch band, which Mount-It! describes as the typical arm-extension distance across its long-extension lineup. That range covers the vast majority of living room and bedroom installs.
A few concrete examples show where the ceiling sits within that class:
- SANUS VXF220 — all-weather dual-arm mount for 42–84 inch TVs, extending 20 inches (52.07 cm).
- SANUS XF228 — dual-arm mount for 42–90 inch TVs, extending 28 inches (71.12 cm).
- SANUS LF228 — a discontinued HDpro model for 37–65 inch TVs, rated to 135 lb, also at 28 inches, with ±90° swivel and tilt from +5° to −15°.
Note the LF228’s status. It is a discontinued model, and its unusually broad VESA range of 120 × 48 through 850 × 549 mm should not be assumed to carry over to current SANUS products.
Long Extension Arms: The 28–40 Inch Class
Long-arm mounts push past 28 inches and commonly top out around 40, trading a bigger swing radius for heavier leverage on the wall plate. This is the class to shop if your TV needs to clear a corner, a built-in cabinet, or an adjacent doorway.
| Mount Model | Maximum Extension | TV Size & Weight Rating |
|---|---|---|
| SANUS BXF330 | 30 inches | 65–100 inch TVs, up to 175 lb |
| Mount-It! MI-393 | 40 inches (retracts to 2.9 in) | Up to 70 inch TVs, 110 lb |
| Mount-It! Long Arm | 40 inches | 42–80 inch TVs, 110 lb |
| Physix LONG 2080 | 32 inches | 32–75 inch class |
| Physix LONG 2100 | 40 inches | 32–75 inch TVs |
| Physix LONG 4100 | 40 inches | Varies by model |
| Physix LONG 2120 | 47 inches | Varies by model |
The 47-inch Physix figure is the outer edge of what is commonly sold, not a normal expectation. Physix lists up to 180° swivel and tilt of 15° down and 5° up across the LONG series, with VESA compatibility varying by model. Prices in this class move around — Mount-It!’s collection lists options at $99.99, $128.99, $194.99, $221.99, $229.99 and $249.99, and availability changes.
Long arms also carry heavier wall loads. Mount-It! lists examples rated at 176 lb and 220 lb capacity within its extended lineup, which tells you the fastener and stud requirements climb with the reach. If you are weighing specific models for a corner or fireplace wall, our roundup of long extension TV wall mounts compares them side by side.
What Decides Your Usable Reach?
A quoted extension figure is a maximum, not a promise at every angle. Screen width, wall clearance, and arm geometry all cut into the real swing, and a 40-inch arm behind a 75 inch panel can run out of room fast.
MantelMount sits in a different category entirely. Its mounts are pull-down designs, so the headline number is vertical travel — MM340, MM540 and MM815 lower up to 27 inches, MM700 manages 26 inches (24 when recessed), and MAX1 reaches 29 inches. None of those figures describe horizontal arm reach, and treating them as if they did will leave you with a mount that does not clear the mantel the way you expected.
Before you install, verify these against the exact manufacturer manual: TV diagonal range, TV weight including accessories, VESA pattern and screw size, wall construction and stud spacing, and clearance for cables, power plugs, soundbars and nearby cabinets. The Mount-It! 40-inch mount identifies 16- and 24-inch stud spacing compatibility; other models differ.
The most common mistakes are predictable. People confuse arm extension with wall-to-screen distance. They pick a mount by TV size alone and ignore VESA and weight. They install into drywall without locating structural support. They route cables so tight that full extension strains the ports. Retailer listings are a starting point, never the final word — the manufacturer’s current manual controls fastener selection, wall type, torque and safety limits. Heavier screens also shift the center of gravity further out on a long arm, which multiplies the load at the plate.
Common Questions
Is a 40-inch extension too much for a 75-inch TV?
It depends on the mount’s weight rating and your wall. A 40-inch arm puts the TV’s center of gravity well off the wall, so the plate and fasteners carry far more leverage than a 20-inch arm. Check that the mount supports your panel’s weight and that your studs suit its wall plate before committing to that reach.
Does arm extension include the thickness of my TV?
No. Extension is measured from the wall or mounting plate to the TV’s rear mounting area, not to the front of the screen. Add your panel’s depth to the extension figure to estimate how far the display actually projects into the room.
Do MantelMount pull-down mounts extend outward from the wall?
Not in the horizontal sense. MantelMount products are pull-down designs, and their published figures — 27 inches on MM340, MM540 and MM815, 26 inches on MM700, 29 inches on MAX1 — describe vertical lowering, not arm reach. Do not compare those numbers against full-motion extension specs.
Sources
- SANUS. “TV Mounts and Stands” Source for current SANUS full-motion mount models and extension specifications.
- SANUS. “LF228 Full-Motion Wall Mount” Documents the discontinued LF228’s 28-inch extension, 135 lb rating, and VESA range.
- Mount-It!. “Long Extension TV and Display Mounts” Source for typical 15–25 inch arm extension, long-arm models, capacity ratings, and current pricing.