Invacare Top End Crossfire All Terrain Wheelchair

A wheelchair that is too narrow or too wide can cause discomfort. When too narrow, a wheelchair can become restrictive and increase the likelihood of pressure sores, while when it's too wide, becomes more difficult to push due to the angle of the arms from the shoulders to the wheels.

To determine the necessary seat width, measure the rider's widest area of the body and add one inch. This will allow for optimum seat width while maintaining ideal usability, comfort and safety.

To determine the appropriate seat height, measure from the bend of the knee to the bottom of the foot. Subtract the height of the seat cushion if one is being used. If the wheelchair is not being self propelled by the feet, also add about 2 inches to allow for foot clearance.

A chair's rear seat-to-floor height is most commonly set at a height 1" lower than the front seat height.

The rear of the seat is generally set at lower height than the front of the seat to prevent sliding forward.

The greater the camber angle, the further the distance between the bottom of the rear wheels and the closer the distance between the top of the wheels. Increasing the camber angle provides the rider with increased maneuverability and stability, but also increases the overall width of the wheelchair.

Typically 0-3 degrees of camber is considered standard for everyday use to accommodate narrow doorways and aisles. A higher camber angle is useful for sporting activities such as basketball where added stability and maneuverability is desired.