Power assist wheelchair wheels.You push, we help.
The SD Motion Assist is a power assist wheelchair system that turns your manual chair into an easier, go-further machine. Sensor-driven, smooth and intuitive — keep full control with far less effort.
Your manual chair, now with assistance power.
The SD Motion Assist is a lightweight power assist wheelchair system that attaches to your manual wheelchair and boosts every push with sensor-driven, electric assistance. It feels natural, smooth and responsive — you stay fully in control, but with far less effort.
Whether it's a hill, a long day out, a stretch of grass or simply keeping up with the family, this power assist wheelchair gives you the freedom to say yes to more. UK-manufactured in Hemel Hempstead since 1999.
Book a Demo & Try for Yourself →
Push, and it helps.
Ease off, and it fades.
Each push on your hand rim is detected by electronic sensors that instantly deliver the right level of assistance from the wheels. The response feels natural and intuitive from the moment you try it — as close to your normal self-propel as you can get, just easier. Your shoulders, elbows and wrists do far less work. Long days, slopes and uneven ground stop being the deciding factor in where you can go.
Indoor mode.
Outdoor mode.
A mode switch on the wheel lets you choose between two levels of power — gentle support for indoors and tight spaces, or stronger assistance for slopes, grass and longer distances. Even hills can be managed without having to ask for help.
Quick-release wheels.
In your car in seconds.
Pull the D-ring on the centre hub and the powered wheel comes off in seconds — for lifting into a car, storing at home, or folding the wheelchair normally. Your chair still behaves like a manual chair when you want it to.
Tuned to you.
Not the other way round.
Our engineers can program the assist response to suit your strength, style and the terrain you spend most time on. More help when you need it, less when you don't — so the chair always feels like an extension of you.
Engineered to last.
Every part of the SD Motion Assist is fitted and supported by us in the UK — we've been making powered wheels since 1999.
Wheel hub motor
Highly efficient brushless motors, with a built-in braking function for safe, controlled speed on downhill slopes.
Battery pack
Choose Ni-MH (18 km) or Li-Ion (25 km). Carry handles for easy removal; optional battery bag for under or behind the seat (wheelchair dependent).
Quick-release wheels
D-ring quick release. Opt for standard grey pneumatic tyres or upgrade to black Schwalbe Marathon Plus tyres.
SD Motion Assist — full spec.
Every weight, range and performance figure in one place.
*Range figures based on 24" wheels at a continuous 5 km/h on a flat surface, with a fully charged new battery and 75 kg user weight.
Options & upgrades.
The SD Motion Assist can be configured to suit your chair, your strength and the terrain you use most — from battery type and tyre upgrades to anti-tippers and battery bag mounting.
Real people. Less effort.
From people using the SD Motion Assist every day — at home, at work and out in the world.
"I am a big fan of the SD Motion Assist wheelchair system which I came across 15 years ago and have been using ever since. It easily navigates rough ground and grass, and the wheels can be taken off and on to transfer if necessary. This system has helped me 100% with life from a wheelchair."
"I still feel like I'm pushing my own chair — that mattered to me. But the slopes near home that used to be a no-go are now just part of the route. It's quietly brilliant."
"We had it fitted to my existing Quickie. No drama, no compromises. I get further, my shoulders are less sore at the end of the day, and the wheels pop off for the car."
Common questions.
The questions we hear most from people considering the SD Motion Assist.
Will it fit my existing wheelchair?
The SD Motion Assist attaches to your manual wheelchair and is designed to fit a broad range of 24" chairs. During your free home demo we'll confirm compatibility with your specific chair and configuration.
How is it different from a fully powered chair?
You still self-propel — sensors detect each push and add assistance. You keep the feel and footprint of your manual chair, with far less effort. A fully powered chair (like our SD Motion Drive) takes over the propulsion entirely via a joystick.
Ni-MH or Li-Ion battery — which should I choose?
Ni-MH gives a range of around 18 km and is the lighter-cost option. Li-Ion gives up to 25 km with a slightly lighter battery and faster top-up charging. We'll talk you through both during your demo.
How long does it take to charge?
Ni-MH takes approximately 2–3 hours for a full charge. Li-Ion takes around 4.5 hours. Both batteries have carry handles so you can remove and charge them indoors.
Can the wheels really come off easily?
Yes — pull the D-ring on the centre hub and the wheel releases in seconds. No tools, no fuss. The chair then folds normally for transport or storage.
Can I try one before I buy?
Absolutely. We offer free, no-obligation home demonstrations across the UK. We come to you, fit it to your chair, and you try it on the surfaces and slopes you actually use.
Try it on your chair.
Free of charge.
We'll bring the SD Motion Assist to you, fit it to your wheelchair and let you try it on the surfaces and slopes you actually use. No obligation.