Rear Drive Unit Under a Folding Chair
Fitting beneath a folding chair, a rear drive unit is one of the simplest add-ons.
A wheelchair power add-on can take the effort out of hills and long trips while keeping your own manual chair. Browse the add-ons below, then open Read More to compare add-on types and check compatibility.
People searching for the best wheelchair power add-on usually want one product name. The trouble is that add-ons work in very different ways, and each suits a different kind of user, chair and journey. A unit that transforms one person’s independence can be useless to another because it will not fit their frame, it is too heavy to take on and off, or it does not help with the problem they actually have. This guide is for manual wheelchair users who push themselves and want to know which type of power add-on for a wheelchair makes sense, and how to check it will work with the chair they already own.
If you are a carer looking for help pushing someone else, the options overlap but the priorities are different, so look for guidance written specifically for attendants.
Many self-propelling users love their manual chair. It is light, it folds into the car, it is tuned to their body and it keeps them active. What they want is help on the hard parts: hills, long distances, rough ground or days when fatigue or pain sets in. A wheelchair motor attachment lets you keep that familiar chair and add power only when you need it. For many people this is a better fit than switching to a full electric wheelchair, which is heavier, bulkier and does all the work for you.
There are trade-offs. An add-on adds weight and complexity, may change how the chair handles and needs charging. It is worth being clear about what you want it to do before comparing models.
A wheelchair front attachment clamps to the front of the frame and lifts the chair’s castors off the ground, so you ride on a single powered front wheel plus the rear wheels. Some are powered by a motor with a throttle on the handlebar; others are hand-cranked or offer a mix of both. Front attachments give a big, grippy wheel that copes well with kerbs, grass and gravel, and they can cover long distances. They also make the whole set-up longer, which matters in shops and on narrow pavements, and you need a secure spot to store the unit when it is not attached.
Push rim activated power assist replaces your rear wheels with motorised hubs, or adds a sensor to the push rim, so each push you make is boosted by the motor. You still propel the chair in the usual way, but with less effort. The chair looks and moves much like a normal manual chair, turns in tight spaces and keeps you exercising. The downside is that power-assisted wheels are heavier than standard wheels, which you notice when lifting them into the car.
A rear drive unit sits under or behind the chair, with one or two small drive wheels touching the ground. You control it with a small wireless remote, a wrist band or through sensors that respond to your pushes. These units are often compact and relatively light, and can be removed easily. They suit people who want a gentle boost on longer routes. On loose or wet surfaces, a single small drive wheel may lose grip.
An electric wheelchair conversion kit adds motors and a joystick, effectively turning a manual chair into a powered one. This suits people who can no longer self-propel at all but want to stay with their existing frame. Converted chairs become heavier and less easy to fold, so they sit closer to a lightweight powered chair in practice. Compare them with a purpose-built lightweight electric wheelchair before deciding.
Compatibility is where most disappointment happens, so check it carefully before buying. Things to confirm with the manufacturer or supplier include:
Most reputable suppliers will ask for your chair’s make, model and measurements, and some will visit to fit and set up the unit. Be wary of listings that claim to fit every chair without asking any questions.
Think about the whole daily routine, not just the ride. How will you get the add-on into the car and back out again? Can you attach and remove it yourself from a seated position, or will you need help? Power-assist wheels may simply swap onto your chair each trip, whereas a front attachment might live in the boot. Batteries often come off separately, which makes lifting easier; our guide to batteries for wheelchairs covers charging and care. If you fly, check airline rules on lithium batteries well before booking, as they vary.
Adding power changes how a chair behaves. Extra speed, weight and pushing force can make the chair more likely to tip backwards, especially if your wheels are set for an active, tippy balance. Anti tip bars are often recommended with power-assist systems. Braking also needs thought: with some systems the motor slows the chair, while with others you rely on your hands on the push rims. Practise in a quiet, flat place before tackling slopes or busy streets.
A powered add-on may also affect how road and pavement rules apply to you. GOV.UK explains the rules for mobility scooters and powered wheelchairs, including speed limits and where you can drive. Check with the supplier how their product is intended to be used.
Once the novelty wears off, the add-ons people keep using are the ones that fit easily into ordinary life. Charging needs a routine, so think about where the battery or unit will sit overnight and whether you can reach the socket from your chair. Some users keep the add-on permanently fitted during the week and remove it only for car trips; others fit it just for particular outings. Both approaches work, but the second only lasts if attaching the unit is quick and easy.
Moving parts and electronics need occasional care. Keep clamps and brackets clean, check fixings for tightness, and protect controls from heavy rain. Ask the supplier how software updates, repairs and replacement batteries are handled, and whether a loan unit is available while yours is being serviced.
If you are still choosing a manual frame to pair with an add-on, lighter chairs make the whole package easier to handle. See our guide to ultra lightweight self propelled wheelchairs for frames that suit active users.
Fitting beneath a folding chair, a rear drive unit is one of the simplest add-ons.
Power-assist wheels with hub motors respond to your own pushes on the rims.
Clip a powered unit to the front for longer trips and rougher paths, bearing in mind it makes the chair longer.
Attendant packs are the add-on to look at if a carer does most of the pushing.
Compare the size of a front add-on with the space in your car boot.
Laid out with its remote, a rear unit shows how little there is to fit.
Most add-ons detach, as here, so the chair folds as normal for the car.
The attendant control on the handle; check it can be moved if different carers push.
Batteries and chargers are part of the comparison, including spares and replacements.
For active users, slender motorised wheels on a rigid frame make a neat, low-key add-on.