Sidiz T80 vs Itoki ACT2
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
18.3 lb
lighter: Itoki ACT2 weighs less than Sidiz T80 (official specs)
Differences at a glance
Sources
- T80 work-tech chair – SIDIZ (SIDIZ official store, Korea) ↗Checked Sep 29, 2026
- ITOKI Product Catalog: Act2 functions and features ↗Checked Sep 29, 2026
- ITOKI quality warranty ↗Checked Sep 29, 2026
- ITOKI (Japan) (price) ↗Checked Sep 25, 2026
Sidiz T80Itoki ACT2
- Price
- ₩689,000 – ₩859,000¥132,240
- Recline
- Multi-limited tilt (limits backrest recline angle), tilt tension adjustment20°
- Arms
- 3D adjustable armrests (height, front-back position, left-right angle)Adjustable arms (4D link arms): height, depth, rotation angle
- Headrest
- Headrest height / angle adjustmentAdjustable head support: 60 mm height, 30° front-back
- Lumbar support
- Lumbar support height adjustmentPelvis & lumbar support: 60 mm, 7 steps
- Warranty
- 15-year quality warranty (for customers who register the product)Structure 3 years (mechanisms and moving parts 2 years, exterior and surface finish 1 year)
What users mention
From 3 Sidiz T80 and 6 Itoki ACT2 user reviews, most mentioned first. Green is liked, orange is a caution.
Design
Sidiz T802 mentionsItoki ACT28 mentionsComfort
Sidiz T804 mentionsItoki ACT24 mentionsAdjustability
Sidiz T803 mentionsItoki ACT25 mentionsBack support
Sidiz T802 mentionsItoki ACT26 mentionsArmrests
Sidiz T802 mentionsItoki ACT24 mentionsSeat
Sidiz T801 mentionItoki ACT25 mentions
Questions
Which has a headrest?
Both: the Sidiz T80 as standard and the Itoki ACT2 as standard.
What do owners mention most?
Comfort for the Sidiz T80, and design for the Itoki ACT2, based on review summaries.
Swap in a similar chair
Compare Sidiz T80 with
More comparisons
- Sidiz T80 vs Herman Miller Aeron Headrest: Headrest height / angle adjustment on Sidiz T80; None offered by Herman Miller on Herman Miller Aeron.
- Sidiz T80 vs Steelcase Gesture Headrest: Headrest height / angle adjustment on Sidiz T80; Optional on Steelcase Gesture.
- Itoki ACT2 vs Herman Miller Aeron The Itoki ACT2 encourages active sitting, while the Herman Miller Aeron offers iconic mesh ventilation.
- Itoki ACT2 vs Steelcase Gesture The Japanese ACT2 and American Gesture differ sharply on durability reports and value.





