Steelcase Series 1 vs SIHOO M59AS

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

Steelcase

Steelcase Series 1

$549 – $750

SIHOO

SIHOO M59AS

$449.99

$99.01

lower starting price for SIHOO M59AS than Steelcase Series 1 at the brand stores

Differences at a glance

Steelcase Series 1SIHOO M59AS

Price: $549 – $750$449.99
Seat height: 16.5–21.5 in (41.9-54.6 cm); 14.75–17.75 in (37.5-45.1 cm); 17.25–22 in (43.8-55.9 cm)46.5–56.5 cm
Seat depth: 15.5"D to 17.75"D (functional seat depth)17.13 in (≈ 43.5 cm)
Load capacity: 400 lb (181.4 kg); 300 lb (136.1 kg)330 lb (≈ 150 kg)
Recline: Weight-activated synchro tilt; comfort dial with upright back lock, boost setting and weight-activated full reclineRecline up to 126°
Arms: 4D arms (standard), height-adjustable arms or armless3D coordinated flip-up armrests (flip up and down, left and right, forward and backward)
Headrest: Optional headrest; adjusts 3.25" verticallyDouble-jointed headrest (height and angle)
Lumbar support: Adjustable lumbar is standard; fixed lumbar is available (3D Microknit Back only)Dynamic lumbar support in a dual-section backrest
Warranty: Limited Lifetime Warranty; 12-year, multi-shift, 24/7 parts and labor3 years

Which is cheaper, the Steelcase Series 1 or the SIHOO M59AS?

The SIHOO M59AS is cheaper to start: $449.99 versus $549 for the Steelcase Series 1 at the brand stores (Sep 2026).

Which has a headrest?

Both: the Steelcase Series 1 as an option and the SIHOO M59AS as standard.