X-Chair X3 vs SIHOO M57

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

X-Chair

X-Chair X3

$979

SIHOO

SIHOO M57

$319.99

$659.01

lower starting price for SIHOO M57 than X-Chair X3 at the brand stores

Differences at a glance

X-Chair X3SIHOO M57

Price: $979$319.99
Seat height: 17.69–22 in46–55 cm (≈ 18.1-21.7 in)
Seat depth: 16.75–19.25 in18.11 in (≈ 46 cm)
Load capacity: 275 lb (125 kg)330 lb (≈ 150 kg)
Recline: SciFloat Infinite Recline + Tilt Lock and Tension allows you to recline and lock into position or increase tension in your recline motion for more fluid movement.Reclines up to 126°
Arms: 4-Dimensional armrests come standard (up, down, side-to-side, front-to-back); option to upgrade to FS 360 rotational armrests; Armrest Height 5.875in - 8.875in3D coordinated armrests (up and down, left and right, forward and backward)
Headrest: Optional add-on (standard configuration: No headrest; Headrest +$115)Headrest adjusts vertically up to 3.9 inches and rotates 45 degrees
Lumbar support: Dynamic Variable Lumbar (DVL)® Support; height adjustable backrest raises the DVL®Dual-adjustable lumbar support (vertical and horizontal)
Warranty: 5 years (all parts and materials); 15 years (non-moving metal components, chair frame)3 years

Which is cheaper, the X-Chair X3 or the SIHOO M57?

The SIHOO M57 is cheaper to start: $319.99 versus $979 for the X-Chair X3 at the brand stores (Sep 2026).

Which has a higher weight capacity?

The SIHOO M57, rated for 330 lb versus 275 lb for the X-Chair X3.

Which has a headrest?

Both: the X-Chair X3 as an option and the SIHOO M57 as standard.