Invacare TDX SI-HD Parts

This page collects replacement parts for the Invacare TDX SI-HD heavy-duty power chair, including the SPJ+ joystick, the Dynamic Shark power module, drive wheel assemblies and the right side motor/gearbox assembly.

The model and serial number are on a label on the frame, usually under the seat. As an authorized Invacare dealer, we supply genuine OEM Invacare parts, with compatible alternatives on select items. Can't find your part? Contact us with your model number and a photo of the old part, and our team will help track it down.