Power-Flex Wheelchair Power Assist, by Soul Mobility

 

 

 

Power-Flex Wheelchair Power Assist

The Power-Flex is an innovative power drive attachment that adjusts to manual wheelchairs with patented positioning, suspension and manual tilt systems providing wired joystick control.

Includes: Manual Tilt System, Suspension & Ride Positioning System, Joystick, U1 Batteries, Battery Charger, & 5" Soft Roll Casters w/ Solid Fork

 

  Soul Mobility power-flex Features  

Manual Tilt System

Offers 30-degree tilt for pressure relief and helps lift front caster wheels over obstacles easily.

Smooth Suspension

Provides a smooth ride over various surfaces, reducing vibration through the lower back and pelvis.

Low-Profile Joystick

Allows unhindered access under desks and tables, with a quick-release feature for seamless transfers.

Extended Range

Drive up to 12.00 mi (19.31 km) per charge with continuous driving at a top speed of 5.00 mph (8.05 km/h).

Universal Fit

Readily fits rigid manual wheelchair frame widths ranging from 12.00 in (30.48 cm) up to 20.00 in (50.80 cm).

Adjustable Armrests

Expertly replicates the profile of manual wheelchair pushrims, aiding in stable weight shifts and lateral transfers.

  Power-flex wheelchair assist Specifications  

Specification	Detail
Overall Width	24.00 in (60.96 cm)
Overall Footprint Length	24.00 in (60.96 cm)
Weight Capacity	275.00 lbs (124.74 kg)
Product Weight	115.00 lbs (52.16 kg)
Top Speed	5.00 mph (8.05 km/h)
Drive Range	12.00 mi (19.31 km)
Compatible Frame Widths	12.00 in - 20.00 in (30.48 cm - 50.80 cm)
Frame Type	Rigid
Legrest Options	Not Applicable

  Power-Flex Measurement Guide  

Compatibility Matrix Data

Attachment & Mechanics Schematic

  Soul Mobility Power-Flex Wheelchair assist Video  

Installation Protocol

Product Demonstration

Design Engineering

Field Application

  Wheelchair Power Assist Accessories  

Frog Legs Rear Casters (pair)

$500.00

Coated Handrims/Armrests (pair)

$250.00

  Soul Mobility Wheelchair Power Assist Downloads  

Order Form Set Up Guide Owner's Manual Spec Sheet

  Power-Flex Power Assist Reviews  

"The tool-free conversion is incredible. It literally takes me less than 30 seconds to snap the Power-Flex on and off. Getting under my desk at work used to be a hassle, but the low-profile joystick makes it completely unhindered."

— James M. March 2, 2026

"The 30-degree manual tilt function saves my lower back on long days. I have it attached to my TiLite Aero Z, and the suspension completely absorbs the bumps on the sidewalks near my house. Completely changed my mobility."

— Sarah L. January 18, 2026

"Highly capable unit. The 12-mile range holds up well, and it hits the 5 mph top speed effortlessly. It is heavy out of the box (115 lbs), but once it's on the chair, the weight isn't an issue at all. Very smooth."

— Robert T. November 5, 2025

Soul Mobility Power-Flex Wheelchair Power Assist Buyer’s Guide

The Power-Flex by Soul Mobility is a specialized power add-on designed to transform a standard manual wheelchair into a motorized mobility device. This innovative system targets users who want to maintain the lightweight benefits of a manual frame while gaining the mechanical advantages of electric propulsion. By integrating this Assist technology, users can significantly reduce the physical strain on their shoulders and arms during long-distance travel or when navigating challenging inclines.

Soul Mobility Innovative Propulsion System

The core of this device is the Soul engineering philosophy which focuses on seamless integration and user autonomy. Unlike bulky, permanent conversions, this system provides a modular approach to mobility. The motor provides a consistent boost to the wheels, allowing the user to travel further than they would with manual pushing alone. It is particularly effective for those who have fluctuating energy levels throughout the day and need a reliable backup for their primary movement.

Power-Flex Universal Mounting Capability

One of the standout features of the Power-Flex is its ability to adapt to various wheelchair frames. The mounting hardware is engineered to be versatile, fitting most standard folding and rigid manual chairs. This ensures that users do not have to purchase a brand-new wheelchair just to enjoy the benefits of power. The setup process is designed to be straightforward, allowing the drive unit to be secured or removed based on the specific needs of the day's activities.

Precision Joystick Control Interface

Navigating tight spaces is made easy through the highly responsive Joystick controller. This interface allows for 360-degree maneuverability, giving the user precise command over speed and direction. The sensitivity of the controller can often be adjusted to match the user's hand strength and coordination, making it an accessible option for individuals with varying levels of upper-body mobility. The compact nature of the control unit ensures it does not add unnecessary bulk to the side of the chair.

Rear-Drive Attachment Mechanics

The system operates as a rear-mounted Attachment that engages directly with the ground or the chair's drive wheels to provide forward and reverse motion. This placement is strategic, as it maintains the chair's stability and prevents the front casters from lifting during sudden acceleration. Because the unit is positioned at the rear, it keeps the front and sides of the wheelchair clear, allowing users to still pull up close to desks, tables, and counters without interference.

Portable Design for Travel and Storage

Weight is a critical factor for any add-on, and this power assist is built with lightweight materials to ensure it doesn't compromise the chair's overall portability. When it is time to load the wheelchair into a car or stow it for travel, the unit can be detached quickly. This modularity is a major advantage for active users who frequently travel by vehicle or airplane, as the battery and motor components can be handled separately from the chair frame.

Battery Efficiency and Range Performance

Equipped with a high-capacity battery, the system is designed to provide several miles of travel on a single charge. The power delivery is optimized to be efficient, ensuring that the motor only draws the necessary current to maintain speed. Charging the unit is simple and can typically be done overnight, ensuring the device is ready for a full day of use. The inclusion of a clear battery indicator on the control module helps users manage their trips without the fear of running out of power unexpectedly.

Power-Flex Power Assist Review

The Power-Flex by Soul Mobility offers a practical and powerful solution for manual wheelchair users looking to enhance their independence. By combining a high-torque motor with a sensitive Joystick and a versatile mounting Attachment, it provides a reliable Assist for various environments. This system effectively bridges the gap between manual and electric mobility, allowing users to enjoy the best of both worlds without the need for a heavy, traditional power chair.