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Steelcase

Steelcase Gesture Task Chair: Shell Back - Platinum Metallic Frame/Base/Seagull Accent - Adjustable Lumbar Support - Roll Control Hard Floor Casters

400 lb capacity
Seat depth adjustment

$1,509.04

In stock on Amazon.com

Specs verified October 2026

Amazon.com data updated October 13, 2026, 2:34 pm ET. Price and availability are accurate as of the time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.

Ergo Score Breakdown

Ergo Score: 43/100

Adjustability 14/40

Armrests3/101D armrests: 3/10

Seat height0/6Not listed by the seller

Seat depth5/5seat depth adjustment: 5/5

Lumbar adjustment0/7Not listed by the seller

Recline0/2Not listed by the seller

Tilt lock3/3tilt lock: 3/3

Tilt tension3/3tilt tension: 3/3

Advanced tilt0/4Not listed by the seller

Support 12/30

Lumbar support12/12lumbar support: 12/12

Upper back support0/4Not listed by the seller

Headrest adjustment0/2Not listed by the seller

Cushion0/5Not listed by the seller

Seat edge0/3Not listed by the seller

Breathable back0/4Not listed by the seller

Build 17/30

Warranty9/912-year warranty: 9/9

Weight capacity6/6400 lb capacity: 6/6

Certifications0/5Not listed by the seller

Base2/3metal base: 2/3

Gas lift0/2Not listed by the seller

Owner rating0/5Not listed by the seller

Comfort Index

Comfort Index: 10/100

Seat cushionNot listed by the seller

Cushion thicknessNot listed by the seller

ReclineNot listed by the seller

Breathable backNot listed by the seller

HeadrestNot listed by the seller

Armrests10/10

Owner rating0/25

Specifications

Seat height range	Not listed by the seller
Seat width	Not listed by the seller
Seat depth	Not listed by the seller
Seat depth adjustable	Yes
Seat cushion	Not listed by the seller
Cushion thickness	Not listed by the seller
Back material	Not listed by the seller
Backrest height	Not listed by the seller
Backrest width	Not listed by the seller
Armrests	1D (height only)
Lumbar support	Adjustable (from Amazon listing)
Lumbar adjustments	Not listed by the seller
Headrest	Not listed by the seller
Max recline	Not listed by the seller
Tilt mechanism	Not listed by the seller
Base material	Metal
Casters	Hard floor
Gas lift	Not listed by the seller
Weight capacity	400 lb (from Amazon listing)
Chair weight	78 lb
Overall height	Not listed by the seller
Warranty	12 years
Certifications	Not listed by the seller

Shell backAdjustable lumbarSeat depth adjustmentTilt lockHard-floor casters

What We Like

The build sub-score of 17 is the fifth highest in its category, helped by a 12-year warranty and a 400 lb rating.
The lumbar type is listed as adjustable, matching the title, and the arms pivot.
The title names Roll Control hard floor casters and the listing agrees, so the chair is set up for hard floors from the start.

Watch Out For

At 78 lb it is the heaviest chair that states a weight, so plan for it to stay where you set it up.
Its Comfort Index of 10 is the lowest in its category, and the listing carries a single review, so there is little owner feedback to lean on.
The arms are 1D, with pivot the only adjustment the listing states, and it does not state a seat height range or a recline angle.

At a Glance

Built around a shell back, this Gesture task chair is listed at 78 lb, rated for 400 lb and covered for 12 years. The title promises adjustable lumbar support, and the spec details give the lumbar type as adjustable while the listing does not state which direction it moves.

Who This Chair Is For

Hard-floor users who want a shell-back Gesture with a lumbar the title calls adjustable and a warranty of 12 years.
Buyers who need a 400 lb rating plus a seat that changes depth.

Who Should Look Elsewhere

Anyone who expects to shift the chair between rooms often, given its 78 lb weight.
Shoppers who want arms that move in more than one direction, because the arms here are 1D.

What the shell-back Gesture Task Chair says about lumbar and tilt

The back is a shell design, and the title calls the lumbar support adjustable. The spec details give the lumbar type as adjustable and do not state whether it adjusts in height, depth or tension. The seat depth is adjustable, tilt tension is adjustable, and the tilt locks at four positions. The arms pivot. The listing does not state a tilt mechanism type or a maximum recline angle.

Alternatives to Consider

Haworth

Haworth Zody Standard Posture Digital Knit Office Chair – Ergonomic Desk Chair with Pneumatic Seat Height Adjustments and Forward Tilt Option - with Lumbar Support (Iron)

Very Good

In stock on Amazon.com

$1,585.00Comfort Index 25/100

Why consider: Its arms are 4D against the 1D arms here, its lumbar is described as Pelvic and Asymmetrical Lumbar, and its Ergo Score is 52 against 43.

Humanscale

Humanscale Diffrient World Office Task Desk Chair - Adjustable Duron Arms - Black Frame White Pinstripe Back and Seat Mesh W11BN01N01-S - Soft Hard Floor Casters

Good

In stock on Amazon.com

$777.60Comfort Index 25/100

Why consider: Weighs 30 lb against 78 lb here and states a weight-sensitive recline, which this listing does not.

Frequently Asked Questions

How is the lumbar adjusted?

The title calls the lumbar support adjustable and the spec details list its type as adjustable, but the listing does not state whether it moves in height, depth or tension.