SIHOO Doro C300 vs Steelcase Series 1: Specs, Warranty and Price

Research note: This comparison uses SIHOO's published store specifications (US and UK official stores) and Steelcase's Series 1 specification guide and cut sheet, not a hands-on Chairpedia test. Figures are quoted as each brand states them, with the document they come from.

Introduction

The SIHOO Doro C300 and the Steelcase Series 1 start at almost the same US list price, which is why they end up on the same shortlist. They are built differently: the C300 is a mesh chair with a headrest and a lumbar pad that adapts on its own, while the Series 1 is a lighter chair with an adjustable lumbar, optional headrest and a long list of factory configurations. In one sentence: the C300 includes more out of the box at its price, and the Series 1 has the higher load rating, the lighter frame and a much longer warranty.

At a glance

SIHOO Doro C300 — strengths and weaknesses

Documented features: SIHOO's UK store gives a seat height of 47 - 55 cm (18.50 - 21.65 in), a seat depth of 43.5-46 cm (17.13-18.11 in), a seat width of 49.5 cm (19.49 in), recline angles of 110°, 120° and 130°, an armrest height range of 6.5 cm (2.56 in), a net weight of 23.20 kg (51.15 lb) and a recommended user height of 150 - 180 cm. The US store lists general dimensions of 28 in wide, 28 in deep and 42-49 in high, a 330 lbs maximum load, 4D coordinated armrests and a three-year warranty. The lumbar is self-adaptive and dynamic, and the chair has a 3D mechanical headrest.

Check before buying: The C300 is the heavier chair, at 51.15 lb against 29 lbs for the Series 1. Its recommended user height stops at 180 cm. The lumbar pad has no manual setting listed. The regular US price is $559.99 (Black) to $569.99 (White) for the Standard Version; the Footrest Version costs more.

Steelcase Series 1 — strengths and weaknesses

Documented features: Steelcase's specification guide gives a seat height of 16.5-21.5 in with the standard cylinder, 17.25-22 in with the optional tall cylinder and 14.75-17.75 in with the optional short cylinder; a functional seat depth of 15.5-17.75 in; a seat width of 19.5 in; a back height of 21.5 in from the seat; a seat-to-back angle of 100° to 122°; 4D arms (standard) with an arm height of 6.5-11 in from the seat; and a chair weight of 29.2 pounds. The cut sheet lists a 400 lbs load for the chair, a weight-activated synchro tilt with a comfort dial and upright back lock, and a Limited Lifetime Warranty with 12-year coverage for multi-shift, 24/7 use. An adjustable lumbar is standard.

Check before buying: The headrest is optional (with 3.25 in of vertical travel), and configurations move the price from $549 to $750 on the US Steelcase Store. The Series 1 seat depth range is shorter than the C300's, so long-legged sitters should measure.

How they differ

Price. The starting list prices are close: $549 for the base Series 1 configuration and $559.99 for the C300 Black Standard Version. A Series 1 with options can reach $750; the C300 already includes its headrest.

Warranty. Limited Lifetime Warranty on the Series 1 against three years on the C300.

Seat. The C300 seat covers 47 - 55 cm (18.50 - 21.65 in); the standard Series 1 covers 16.5-21.5 in, and Steelcase also offers short and tall cylinders. The C300's seat depth (43.5-46 cm) is longer than the Series 1's 15.5-17.75 in.

Load and weight. 400 lbs on the Series 1 against 330 lbs on the C300; the Series 1 weighs 29 lbs against 51.15 lb.

Recline. SIHOO lists three recline angles (110°, 120°, 130°); Steelcase lists a seat-to-back angle of 100° to 122° with a weight-activated tilt. The brands measure differently, so read these as descriptions rather than a contest.

Lumbar and headrest. The C300's lumbar adapts by itself; the Series 1's is adjusted by hand. The C300 includes a headrest; on the Series 1 it is an option.

Who should buy which

Pick the SIHOO Doro C300 if you want a headrest and a lumbar pad you never have to set, a longer seat, and all of that at the starting list price. Pick the Steelcase Series 1 if the warranty length matters most to you, you need the 400 lbs rating, you want a lighter chair, or you need a short or tall cylinder to match your height or desk. If the C300 appeals but you want 6D arms and adjustable seat depth, the SIHOO Doro C300 Pro lists higher with those additions.

Sources

• SIHOO US and UK official stores — Doro C300 product pages (specifications, regular prices, warranty), checked 2026-09-29 and 2026-10-07.
• Steelcase — Understanding and Specifying Steelcase Series 1 Work Chairs (Seating Specification Guide), Series 1 cut sheet and product page, and the US Steelcase Store price range, checked 2026-09-29.

Bottom line

Close on starting list price, far apart on everything else. The SIHOO Doro C300 includes more at its price (headrest, self-adapting lumbar, a longer seat); the Steelcase Series 1 is lighter, rated for more weight, offers cylinder options and carries a Limited Lifetime Warranty. Compare the live prices with the options you actually need before ordering.