The Quantum 4Front Powerchair


Dare to move forward. The Quantum 4Front™ is a quiet, more responsive front-wheel drive power chair that features automotive-grade suspension with unprecedented comfort and ride quality. The Quantum 4Front's CASE (Caster Angle Sensor Encoder) technology and SRS (Smooth Ride Suspension) provide stability for smooth obstacle transitions and unmatched driving performance. The Quantum 4Front features standard speeds of up to 6 mph in the lowered position, and speeds up to 3.2 mph while elevated at 10" with our optional safe seat elevation. Standard LED fender lights allow you to see and be seen.


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  • CASE (Caster Angle Sensor Encoder) technology
  • Unmatched driving performance and ride quality
  • Advanced stability for smooth obstacle transitions
  • Superior, automotive-grade SRS (Smooth Ride Suspension)
  • Q-Logic 3 EX Advanced Drive Controls
  • LED front and rear fender lights
  • Quiet ride technology

Seating Options

TRU-Balance 3 Power Positioning Systemstru balance 3 edge 3 blue jean

TRU-Balance® 3 Power Positioning SystemsTRU-Balance® 3 Power Positioning Systems feature an innovative design that maximizes functional independence while providing an appealing look and feel.

TRU-Balance 3 has the ability for quick and easy fine-tuning adjustments to ensure maximum comfort and positioning. Optional 10" of safe seat elevation is offered on the 4Front™.


LED fender lights

Standard switch-operated LED fender lights offer great benefits and features for increased visibility.

With lighting mounted to the fender, above the drive tire on each side, fender lights help ensure that you can see and be seen.

  • Slim-line fender integration for ultimate compactness and durability
  • Ultra-bright, long-life LEDs allow optimal user visibility at night
  • White front lighting and red rear tail lighting
  • Positioning of lights increases pedestrian visibility from a wide range of angles


Model 4Front
Drive Wheels 14" flat free
Caster Wheels Rear: 9" flat free
Anti-Tip Wheels Front: 4"
Maximum Speed4 Up to 6 mph
Ground Clearance 3" (motor pivot)
Turning Radius5 24.5"
Overall Length 40"
Base Width 24"
Seating Sizes TRU-Balance® 3
Synergy®/Static: W: 12-22" D: 12-22"
Power Tilt: W: 12-22" D: 12-22"
Lift & Tilt: W: 12-22" D: 12-22"
Seat-to-Floor Heights16 TRU-Balance® 3
Synergy®/Static8: 15.25-17.25"
Power Tilt8: 17.5-19.5"
Lift & Tilt8: 17.75-19.75"
Manual Recline10 Yes
Battery Size6 Group 24 or Group 34
Battery Weight14 Group 24: 51.5 lbs.
Group 34: 38.5 lbs.
Available Electronics12 120A Q-Logic 3 EX
Battery Charger 8A Off-board
Motor Packages Two-pole, front-wheel drive
Weight Capacity7 300 lbs.
Base Weight 140 lbs.
Medicare Code Coverage Group 3:
Standard (K0848/K0849)
Single Power (K0856)
Multiple Power (K0861)


4 Speed varies with user weight, terrain type, battery charge, battery condition and tire pressure.

5 Without front riggings

6 Battery capacity may change when adding power positioning systems.

7 Weight capacity is dictated by the selection of seating.

8 All measurements +/- 1/8" with 18" x 18" seat, fixed towers, 300 lbs. weight capacity and solid tires (add 3/8" with pneumatic tires). Depths may increase seat-to-floor height. Contact Customer Service for details. Limited measurements are in the lowest position; does not include elevating system unless specified.

12 All Quantum Rehab® units can be ordered with specialty controls

14 Battery weight may vary +/- 3 lbs. based on manufacturer.

16 Seat-to-floor heights are measured with the unit unloaded. Due to the 4Front’s suspension system, seat-to-floor heights are approximately 0.25” lower when the unit is loaded.

The information contained herein is correct at the time of publication; we reserve the right to alter specifications without prior notice.

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