World’s first Total Shear Force measurement device

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    A tool to excellent seating
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    A solution to a global clinical challenge
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    Measure tendency to slide

iShear is the first clinical tool to measure Total Shear Force* (tendency to slide) in the seat plane. It helps you minimize sliding forces when setting up a wheelchair. It can be used on almost every common wheelchair by placing it underneath the cushion. No change in the client-seat base interface is required. Once installed, you can use the free iShear app for real time data monitoring.

The setup is easy: all you need is iShear and a mobile device. Simply download the free iShear app and off you go. It’s shear genius. iShear is a valuable tool which helps you to evaluate the set up quality of a wheelchair’s seating system in any environment, location and situation.

Discover how iShear works or have a look at the available clinical cases.

*Total Shear Force: The Total Shear Force in the seat plane measured by the iShear is the anterior-posterior force

Technical Specifications and system requirements

  • Weight: 1,7 kg / 3.75 lbs
  • Dimensions (HxWxD) 27 x 690 x 615 mm / 1.06 x 27.17 x 24.21 inches
  • Material sensor bar: aluminium
  • Material top layer mat: PU coated tricot and nylon fabric
  • Batteries: 4 AAA 1,5V LR03 batteries
  • Supported operating systems: iOS 10.2 or newer, compatible with iPhone, iPad and iPod Touch I Android 4.4 or newer
  • Connection requirements: Bluetooth Low Energy (BLE, also known as Bluetooth Smart). This Low Energy Bluetooth version is in general available on devices since 2011 (first BLE version was Bluetooth 4.0).
  • Ambient temperature Minimum: -10 °C / 14 F, Maximum: 40 °C / 104 F
  • Relative humidity Operating: 30 to 75% RH (non-condensing)
  • Storage: 10 to 100% RH (non-condensing)


Wheelchair requirements:

  • The iShear can be used in a seat plane of 35 – 50 cm / 1334 – 20 inch width and 35 – 50 cm / 1334 – 20 inch depth.
  • The back-support canes must be at least 30 cm / 12 inch apart from each other



  • Allowed user weight on the iShear: Minimum: 45 kg / 99 lbs, Maximum: 120 kg / 264 lbs
  • Two year warranty
  • (Online) education available upon request