Zygo Deep
Contour Lo
Back Support

Enabling freedom without compromising posture and comfort, Zygo is a back support with inbuilt laterals designed for full-time self-propelling wheelchair users.

Active wheelchair users don’t want to be held back – they want the freedom to go places and do amazing things.

Zygo back support systems are lightweight, easily adjustable, easy to install and remove, more breathable and more personalised.

Zygo back support systems give you more comfort, flexibility, personalisation, and freedom to move – enabling you to go places, achieve more, and be whoever you want to be.

The back support is an integral wheelchair component for appropriate seating position and trunk support. It plays an important role in increasing comfort and function for wheelchair users.

Sitting over extended periods of time can cause discomfort and accelerate the development of spinal deformities. Manual wheelchairs are usually supplied with sling-style back supports which do not provide appropriate postural support, nor adequate pressure relief, for some full-time wheelchair users. Rigid back supports are recommended for improved postural support and comfort.

Spex Seating aimed to design the Zygo back supports with suitable shapes and sizes for most active users, without any major adjustments or customisations.

A low-height shell with a supportive deep contour provides…

  • Support for the pelvis and lumbar spine
  • Deep contour suitable for users with moderate trunk mobility and strength
  • Features a round, padded top relief to support and protect the spine
Videos &
How to use the Zygo Fitting Guide
Story behind the design
Zygo Cover Extension Installation
Drop Mount

The lightweight Drop Mount hardware self-locks into place and is simple to operate with a single combined clamp and mechanism unit. The release mechanism is simple to operate, and suitable for single-handed use, and those with limited hand function. The hardware gives plenty of adjustability and rigidity and can be used on a wide range of wheelchair frames.

Developed using a composite material the Drop Mount Hardware is lightweight (600-800g) without compromising on durability.

Available in four sizes, ensures the visual footprint of the hardware is paired perfectly to the back support size. The hardware fits 10” to 20” wide backs which are between 7” to 18” tall.

Size Code Width Adjustment Depth Adjustment Wheelchair Compatibility: When used with Zygo Back Supports Wheelchair Compatibility: When used with Spex Back Supports Weight
Paediatric 1259-1400-00P 1″ 2 +2″ to -2″ +2″ to -0″ 600g
Small 1259-1400-00S 1.7 1.5 +2″ to -2″ +3″ to -0″ 600g
Medium 1259-1400-00M 1.7 2 +2″ to -2″ +3″ to -0″ 700g
Large 1259-1400-00L 2.3 3 +2″ to -2″ +4″ to -2″ 800g


Weight Capacity
Size Options
Thickness of Zygo Lo Back Supports
Hardware Selection
Zygo Style Size Weight
Zygo Deep Lo 16″ x 9″ 0.9kg

Maximum Occupant Weight: 136kg

The Zygo Back Support Family implements a unique “user-focused” scripting process where the size is determined by the user size, not the wheelchair width, thereby ensuring a tailored fit to the torso. See our Zygo fitting guide.

Deep Lo – Sizing Table
Zygo Size Outer Width Inner Width Height Depth Lateral Height Code
12″ x 7″ 10.5″ 8.5″ 7″ 3.5″ 6.2″ 1251-1207-0DL
 14″ x 8″ 12.5″ 10.5″ 8.2″ 4.5″ 7.4″ 1251-1408-0DL
16″ x 9″ 14.7″ 12.5″ 8.8″ 5.8″ 7.8″ 1251-1609-0DL
18″ x 9″ 16.7″ 14.5″ 9.4″ 6.3″ 8″ 1251-1809-0DL
20″ x 11″ 18.7″ 16.5″ 10.6″ 6.3″ 8.5″ 1251-2011-0DL


Zygo Style Width Supportive Pink PU Foam Velcro Grey Contouring Layer Overall Thickness (Including Cover)
Zygo Lo 12″ to 14″ 20mm 6mm EVA 30mm
Zygo Lo 16″to 20″ 25mm 6mm EVA 35mm

Crash tested and transport certified to ISO 16840-4:2009

Discover the Benefits of Drop Mount Hardware