FreeWheel

FreeWheel

• Wheelchair casters are lifted off the ground, turning your chair into a 3-wheeler, so you simply roll over any obstacle: curbs, dirt trails, grass, gravel, snow, and sand
• Designed to be used on a manual rigid frame or folding wheelchair
• Initial installation may take approximately 15 min., after that the FreeWheel clamps on and off in seconds

http://www.gofreewheel.com/