KI Ruckus vs Vitra Physix

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

KI Ruckus

$449 – $598

Vitra

Vitra Physix

From $1,520

$1,071

lower starting price for KI Ruckus than Vitra Physix at the brand stores

Differences at a glance

KI RuckusVitra Physix

Price: $449 – $598From $1,520
Seat height: 17.7–22.4 in (45.0–56.9 cm)390–510 mm
Seat depth: 18.8 in (47.8 cm)435 mm
Arms: Integral armrest functions as a support surfaceFlexible frame and armrests in polyamide (deep black or soft grey)
Warranty: Lifetime5 years

Which is cheaper, the KI Ruckus or the Vitra Physix?

The KI Ruckus is cheaper to start: $449 versus $1,520 for the Vitra Physix at the brand stores (Sep 2026).

What do owners mention most?

Comfort for the KI Ruckus, and adjustability for the Vitra Physix, based on review summaries.