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TDX SI Heavy Duty by Invacare

TDX SI Heavy Duty TDXSIV-HD Power Wheelchair by Invacare

Product Description

The TDX-SI Heavy Duty offers a 450 lb weight capacity. Built off the proven TDX-SP platform, it delivers legendary TDX power and performance, making it ideal for meeting the driving needs of bariatric consumers. Center-wheel drive and a narrow footprint provide exceptional indoor maneuverability, while it’s brightly painted frame and integrated rear suspension combine for a simple yet elegant design. The end result is an eye-catching power wheelchair with a go-anywhere attitude.


  • Simplified Sure Step: Maintains 6 wheels on ground, climbs 2″ with ease.
  • Center Wheel Drive: Provides tight turning radius.
  • Integrated Rear Suspension: Provides smooth ride, ideal for rough terrain.
  • Serviceability: Removable battery access door with slide out battery tray.
  • Transportability: Available with transport brackets.


Product Weight Capacity:450 lbs.
Seat Width:18″ – 24″
Seat Depth:16″ – 22″
Overall Width:24″
Overall Length:With Front Riggings: 38.5″
Without Front Riggings: 35″
Overall Height:Without Headrest: 38″
With Headrest: 45″ – 47″
Back Height:Without Headrest: 18″
With Headrest: 25″ – 27″
Back Angle:85 – 115 degrees
Incline Capability:6 degrees
Turning Radius:23″
Speed:5 mph
Power Wattage:4 pole, 650 watt motors
Battery:22NF (2)
Wheel and Caster Size:Front Casters: 6″ x 2″
Drive Wheels: 14″ x 3″
Product Weight:With Batteries: 267 lbs.
Without Batteries: 191 lbs.
W/Transport Brackets: add 10 lbs.
Color:Electric Red
Electric Blue
Seat Style:Van Seat
Electronic Options:Electronics: MK6i 90-Amp controller with SPJ+ joystick.
Warranty:Base Frame: 5 years
Seat Frame: 3 years
Electrical Components: 1 year
Motors: 1 year
Batteries: 6 months
Remaining Components (except upholstered materials, padded materials, tires/wheels): 1 year
NOTE: For more detail please refer to the full specifications brochure link above, or call Customer Service at (800) 333-6900. All specifications, prices, and product configurations are subject to change without notification. Accessories and seating products shown in the photographs are not necessarily included in the base price of wheelchair. Please refer to current price lists located at www.invacare.com.

* MSRP – Manufacturer’s Suggested Retail Price does not include optional equipment and accessories that may be available for this product.** This information is not intended to be, nor should it be considered billing or legal advice. Providers are responsible for determining the appropriate billing codes when submitting claims to the Medicare Program and should consult an attorney or other advisor to discuss specific situations in further detail.