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21st Century Scientific, Inc.

21st Century Scientific, Inc.

4931 N Manufacturing Way
Coeur d'Alene, ID 83815


Big Bounder H-Frame

BIG BOUNDER H-Frame power chairs are configured specifically for bariatric users. They are custom built to each user's unique dimensions. The electronics and drive train are optimized at the factory for the user. Available in seat widths from 21” to 48”. Very narrow overall widths (as little as 2.5” wider than the seat width) result in improved maneuverability through doors and tight spaces.

  • 500 lb capacity is standard
  • 700 lb and 1000 lb weight capacity options

Bounder Plus H-Frame Power Wheelchair

» Uses standard 25.5" Overall Base Width Frame. Narrow Base Width Options available
» Durable H-style frame uses 2.5” x 1.5” x 0.125” wall steel - TIG welded for superior strength
» 0.120” wall steel seat rails and back posts - for extra strong seat and back
» Super Torque 3 motors and brakes
» Non-slip chain drive - won’t slip in rain or snow; similar to those used on many motorcycles
» Sliding dual group 27 battery box - for extended range and ease of maintenance
» Xtra Duty 12 position adjustable suspension forks - with oversized 1” diameter bearings and fork stems
» Sheet metal pan seat
» Super Duty sling back upholstery - double liner, cap, and web strap under every screw; attached with machine screws
» Detachable desk length arms
» Anti-tipping wheelie wheels
» UE1 Series electronics - 6 drive programs, battery condition meter, diagnostics, and more
» Smart electric brake release - for easy pushing by an attendant
» 9” x 3.50” steel caster wheels - excellent on most surfaces including grass and dirt roads
» 12.75” x 4.00” steel drive wheels - available with smooth or knobby treads
» Safety taillights built in - turn on and off with chair power (turn on and off with light switch if headlight ordered)
» Very stable rear wheel drive - does not fishtail at high speeds unlike front and mid-wheel drives
» Durable black powder coated frame
» Fully automatic 8A dual mode battery charger - charges both gel-cell and lead acid batteries

Bounder Plus Off-Road Power Wheelchair

Power wheelchair users need their chairs. This is a fact. Good seating, smooth ride, and reliability are necessary. Sometimes it is also NECESSARY to traverse “off road”. Maybe your home environment is not all paved city streets. When the going gets tough, the TOUGH BOUNDER users really get going - going with the OFF-ROAD PACKAGE that makes it all possible!

The special 13.5” x 5.40” low pressure pneumatic tires provide a very smooth ride. Going over rough terrain is no longer bumpy and jarring. The aggressive knobby tire design provides excellent traction when traversing loose terrain, mud or even snow. The Super Torque 4 medium speed motors have all the torque needed to climb steep hills. The Off-Road Option Package is what power wheelchair users want in a performance chair.

PSE2 Power Seat Elevator

Power Seat Elevator 2 (PSE2) uses a scissor lift mechanism and is available on the all BOUNDER Chairs. The seat, back, arms and front rigging all elevate together. The PSE2 can elevate up to 13" (33.02cm)* bringing the user to standing eye level. Even more impressive, most users under 250 lbs can drive the chair in the raised position. Limited speed, operation on level ground, and good judgment are of course required.

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