The short answer: buy the Series 1 unless you want the Series 2’s look or an upholstered back. The two chairs share the same weight-activated recline, the same 4D arms, the same seat height range and the same 400 lb rating. The Series 2 adds Steelcase’s Air LiveBack, a flexing patterned back, and more back styles, including upholstered ones with adjustable lumbar. The Series 1 is lighter, cheaper and certified to BIFMA Level 3.
Prices in November 2026: on Amazon, from Pattern, Steelcase’s authorized seller, the Series 1 is $494.10 and the Series 2 $515.25. In Steelcase’s holiday sale (November 12 to December 8, 2026), the default Series 1 is $525 (was $584) and the default Series 2 Air $615 (was $684).
Series 1 vs. Series 2 at a Glance
| Steelcase Series 1 | Steelcase Series 2 (Air) | |
|---|---|---|
| Price, November 2026 | $494.10 on Amazon; $525 on sale at Steelcase (was $584) | $515.25 on Amazon; $615 on sale at Steelcase (was $684) |
| Back | 3D Microknit with LiveBack flexors (Series 1 Air also available) | Air LiveBack frame: AirBack, AirBack with 3D Microknit, or upholstered |
| Adjustable lumbar | On the 3D Microknit back only | On 3D Microknit and both upholstered backs |
| Mechanism | Weight-activated synchro-tilt | Same |
| Recline settings | Comfort dial: upright lock, boost, full recline | Same |
| Arms | 4D | 4D |
| Seat height | 16.5 to 21.5 in. | 16.5 to 21.5 in. (optional 14.75 to 18 or 17.25 to 22 in.) |
| Seat depth | Adjustable 15.75 to 18 in. | Adjustable 14 to 17.75 in. |
| Seat width | 19.5 in. | 19 in. |
| Weight capacity | 400 lb (stool 300 lb) | 400 lb (stool 400 lb) |
| Chair weight | 29 lb | 35.8 to 37.4 lb |
| BIFMA Level 3 | Yes | Not listed |
| Warranty | Lifetime on frame; 12 years on mechanisms, cylinder, foam, casters | Same |
Specs are from Steelcase’s 2025 Series 1 and Series 2 cut sheets.
What’s the Same
More than you’d expect from the name:
- Mechanism. Both use a weight-activated synchro-tilt with no tension knob. The chair sets its resistance from your weight. A three-setting comfort dial chooses between an upright lock, “boost” for extra tension, and full recline.
- Arms. Both have 4D arms that move up, down, in, out, forward, back and pivot.
- Seat height. Both run 16.5 to 21.5 inches as standard.
- Weight capacity. Steelcase rates both chairs to 400 lb. The often-quoted 300 lb figure is for the Series 1 stool, not the chair.
- Warranty. Both carry Steelcase’s consumer warranty: lifetime on the frame and structure, 12 years on mechanisms, cylinders, foam, arm caps and casters, for the original buyer from Steelcase or an authorized reseller.
What’s Different
The back
This is the main change. The Series 1 uses a 3D Microknit back over LiveBack flexors, the plastic ribs you can see through the knit. The Series 2 uses the Air LiveBack, a frame with a geometric pattern that flexes in two directions, and offers it as an open AirBack, an AirBack covered in 3D Microknit, or a standard or quilted upholstered back.
Lumbar support
On the Series 1, adjustable lumbar comes standard only on the 3D Microknit back. The Series 2 offers adjustable lumbar on the 3D Microknit back and on both upholstered backs. If you want a padded back with adjustable lumbar, that’s the Series 2.
Seat depth and width
The Series 1 seat adjusts from 15.75 to 18 inches deep and is 19.5 inches wide. The Series 2 adjusts from 14 to 17.75 inches and is 19 inches wide. That makes the Series 2 slightly better for shorter people with shorter thighs, and the Series 1 slightly better for longer legs. The Series 2 also offers optional low and tall seat heights. See our office chair seat height ranges.
Weight and certification
The Series 1 is lighter, 29 lb against roughly 36 to 37 lb. Steelcase lists BIFMA Level 3 for the Series 1 and not for the Series 2.
Which Should You Buy?
| If you… | Better pick | Why |
|---|---|---|
| Want the best value | Series 1 | Cheaper, lighter, same mechanism and rating |
| Want an upholstered back with adjustable lumbar | Series 2 | Series 1’s lumbar comes only with the knit back |
| Have long thighs | Series 1 | Seat extends to 18 in. |
| Are short or have short thighs | Series 2 | Seat comes in to 14 in.; optional low seat height |
| Want a drafting stool for a standing desk | Series 2 stool | Rated to 400 lb against 300 lb |
| Like the look of an open, patterned back | Series 2 | Air LiveBack |
Best value
Steelcase Series 1
Weight-activated recline, 4D arms, adjustable seat depth and lumbar, rated to 400 lb.
More back styles
Steelcase Series 2
Air LiveBack, upholstered back options with adjustable lumbar, 4D arms and a 400 lb rating.
Both are also in Steelcase’s holiday sale through December 8. For how the Series 1 compares with its closest rivals, read Branch Ergonomic Chair vs. Steelcase Series 1 and HON Ignition 2.0 vs. Steelcase Series 1. If you’re considering a step up, see Steelcase Leap vs. Gesture. Our guide to the best office chairs has more picks.
Steelcase Series 1 vs. Series 2 FAQ
What is the difference between Steelcase Series 1 and Series 2?
Mainly the back. The Series 2 has the Air LiveBack and more back styles, including upholstered backs with adjustable lumbar. The mechanism, arms, seat height range and 400 lb rating are the same. The Series 1 is lighter and cheaper.
Is the Steelcase Series 2 worth the extra money?
Only if you want its back. On Amazon the difference is about $21, and in Steelcase’s holiday sale about $90 between the default chairs. For most people the Series 1 gives the same adjustments for less.
What is the weight limit of the Steelcase Series 1?
Steelcase rates the Series 1 chair to 400 lb. The Series 1 stool is rated to 300 lb. The Series 2 chair and stool are both rated to 400 lb.
Does the Steelcase Series 1 have adjustable lumbar support?
Yes, on the 3D Microknit back, where it comes standard. Series 1 chairs with other backs have fixed lumbar support.
Does the Steelcase Series 1 recline?
Yes. Its weight-activated recline adjusts resistance to your weight, and a comfort dial sets an upright lock, extra tension or full recline. The Series 2 works the same way.
Is the Steelcase Series 1 good for tall people?
It works for many tall people: the seat goes up to 21.5 inches and extends to 18 inches deep. People with very long thighs may prefer a chair with a deeper seat, such as the Steelcase Leap.
