- Lightweight Frame: K4 wheelchairs often feature aluminum or lightweight steel frames, making them easier to lift, transport, and maneuver than the heavier K1–K3 models.
- Enhanced Adjustability: Most K4s include adjustable back height, tension back upholstery, removable arms, and dual axle seat-to-floor height adjustments (standard or hemi height).
- Upgraded Comfort: The K4 comes with more ergonomic seating, higher-quality upholstery, and often elevating leg rest options, providing a more customized, comfortable ride.
- User-Focused Design: Designed for full-time or long-term users, K4 chairs bridge the gap between standard and ultra-lightweight (K5) chairs, offering many advanced features without the high price tag.