# Wheelchairs & Mobility Scooters

Manual chairs, power chairs, and scooters are three different machines with almost no shared specs. Once you know which one, the real questions are the rider's weight, where it will be used, and whether it fits through the doors at home.

## How it works

A manual wheelchair is a frame on wheels the rider or a helper pushes; a power wheelchair adds a battery, a motor on each drive wheel, and a joystick or switch to steer it; a mobility scooter is a battery-powered tricycle or quadricycle with a seat, steered by a handlebar-like tiller rather than a joystick. Because the three share a frame-on-wheels shape, buyers assume they share specs, but a manual chair's defining facts are frame weight and tire type, a power chair's are where its drive wheels sit relative to the rider's hips, and a scooter's are its wheel count and battery range. Weight capacity and overall width cut across all three: every design has a rated rider-weight limit, and every design has to fit through the same doors. [1] [3] [2] [5]

| Family | What it is | Suits |
|---|---|---|
| Manual wheelchair | Pushed by the rider's arms on the rear wheels' push-rims, or by a helper from behind. | Riders with enough upper-body strength and function to propel themselves, or who always have a helper. |
| Power wheelchair | Battery and motors drive the wheels; a joystick or alternative switch steers it. | Riders who can't self-propel a manual chair, for use mainly at home or close to it. |
| Mobility scooter | A battery-powered 3- or 4-wheel scooter with a seat, steered by a tiller. | Riders who can walk a little or transfer themselves but can't walk far, often for errands or outdoor distances. |

## How an expert narrows the choice

```mermaid
timeline
  section 1 · Mobility type
    manual_wheelchair : ask Self-propelled, Frame type : skip Drive wheel position, Battery chemistry, Battery range, Use class, Wheel count
    power_wheelchair : ask Use class, Drive wheel position : skip Frame type, Self-propelled, Wheel count
    mobility_scooter : ask Use class, Wheel count : skip Drive wheel position, Frame type, Self-propelled
  section 2 · Weight capacity
    Roughly, how much does the rider weigh?
  section 3 · Use class
    Flat floors only, indoors and out, or curbs and rough ground?
```

1. **Mobility type.** Manual wheelchair, power wheelchair, or mobility scooter?
   The three mechanisms share almost no other facet. Answering this removes two-thirds of the register's questions outright.
   If manual_wheelchair: ask Self-propelled, Frame type; skip Drive wheel position, Battery chemistry, Battery range, Use class, Wheel count.
   If power_wheelchair: ask Use class, Drive wheel position; skip Frame type, Self-propelled, Wheel count.
   If mobility_scooter: ask Use class, Wheel count; skip Drive wheel position, Frame type, Self-propelled.

2. **Weight capacity.** Roughly, how much does the rider weigh?
   The rider's weight is checked against weight_capacity (see capacity_headroom), not set directly: crossing roughly 250 lb removes most standard models and moves the search into a bariatric tier.

3. **Use class.** Flat floors only, indoors and out, or curbs and rough ground?
   Power chairs and scooters are built and sold in indoor, mixed, and outdoor capability tiers. This sets expectations for range, ground clearance, and the drive-wheel or wheel-count trade-off.

## What to surface

### Mobility type

Whether it's a manual wheelchair, a battery-and-joystick power wheelchair, or a tiller-steered mobility scooter. This decides almost everything else. A manual chair's defining facts are its frame weight and tires; a power chair's are its drive-wheel position and battery; a scooter's are its wheel count and tiller steering. Asking about any of those before this one wastes the question two times out of three. [1] [4] [5]

Values: manual_wheelchair, power_wheelchair, mobility_scooter.
Question to ask: Manual wheelchair, power wheelchair, or mobility scooter?

Used as: top-level split, filter. Data: on the listing, backfill cost none. Look for it as: Product title and category breadcrumb state this directly.

### Weight capacity

The heaviest rider the frame is rated to carry safely, in pounds or kilograms. Buyers compare price and features before checking this, then find out the chair they want doesn't rate for the rider. Standard chairs and scooters are rated well under what a heavier rider needs; above that, the choice is a separate bariatric or heavy-duty line, not an upgrade of the same model. [4] [5]

Question to ask: Roughly, how much does the rider weigh?

Used as: top-level split, filter, sortable. Data: on the listing, backfill cost low. Look for it as: Already a structured field (`sizing.weight_capacity`, value + unit) in the existing personal-supplies schema; brand spec sheets state it prominently.
Chart: Weight-capacity range.

### Use class

Whether the model is built for flat indoor surfaces only, a mix of indoor and outdoor, or rougher outdoor ground. Power chairs and scooters are designed and sold in these tiers; an indoor-class chair may only reliably cross flat floors, while an outdoor-class one handles curbs and uneven ground but is bulkier and heavier. It is the main thing that should steer the drive-wheel or wheel-count choice that follows. [4] [5]

Values: indoor, indoor_outdoor, outdoor.
Question to ask: Flat floors only, indoors and out, or curbs and rough ground?

Used as: top-level split, filter. Data: needs research, backfill cost medium. Look for it as: Often in marketing copy ('indoor/outdoor use') rather than a discrete spec row; confirm on the brand's own page.

### Self-propelled

Whether the rider can push the chair themselves (large rear wheels with push-rims), as opposed to an attendant-propelled transport chair with small wheels at both ends. These are different products, not two trims of the same one. A transport/attendant chair is lighter and cheaper but offers no independent mobility; it exists specifically for riders who will always have a helper. [4]

Question to ask: Will the rider push it themselves, or need help?

Used as: filter, shown on the card. Data: derived from listing fields, backfill cost low. Look for it as: Usually inferable from the title ('transport wheelchair' vs. 'wheelchair') and the presence of large push-rim wheels in the photos.

### Wheel count

Whether the scooter has three wheels or four. Three wheels give the tightest turning circle and the lowest price, which suits home and shopping use on flat ground. Four wheels trade some turning radius for stability, a higher typical weight capacity, and longer battery life, which suits outdoor and heavier-duty use. [5]

Values: three_wheel, four_wheel.
Question to ask: Three wheels for turning, or four for stability?

Used as: filter, shown on the card. Data: on the listing, backfill cost none. Look for it as: Almost always stated in the product title.

### Battery range

How far it can travel on one full charge, under the manufacturer's test conditions. This is the number buyers actually plan a trip against. Manufacturer figures are a best-case ceiling, not a guarantee, so an expert weighs it against the rider's real daily distance rather than taking the maximum at face value.

Question to ask: How many miles of range do you need?

Used as: shown on the card, sortable, filter. Data: needs research, backfill cost low. Look for it as: Already captured as a free-text field (`battery_range_raw`) in the existing schema; worth promoting to a numeric value with a unit.
Chart: position on a horizontal scale.

### Overall width

The chair or scooter's widest point, which has to clear doorways and hallways at home. US accessibility code sets the minimum doorway clear width at 32 in and the minimum hallway clear width at 36 in; a chair wider than that will not pass through a code-built doorway without removing armrests, let alone an older or narrower one. Buyers who only check whether a chair fits them miss whether it fits their house. [8]

Question to ask: What's your narrowest doorway or hallway, in inches?

Used as: filter. Data: needs research, backfill cost low. Look for it as: Captured as a free-text field (`overall_width_raw`) in the existing schema; worth promoting to a numeric value with a unit so it can be filtered against a doorway measurement.
Chart: position on a scale against the 32 in doorway and 36 in hallway minimums.

### Frame type

Whether a manual wheelchair's frame is rigid (welded, non-folding) or folding. Rigid frames handle better when manoeuvring and are usually lighter for the same strength, but need the wheels removed to shrink down. Folding frames are generally quicker to collapse for a car trunk, though well-made rigid chairs can also fold down small by pulling the wheels and backrest. [2]

Values: rigid, folding.
Question to ask: Fold it for the car, or keep it rigid?

Used as: filter, shown on the card. Data: needs research, backfill cost medium. Look for it as: Brand spec sheet; sometimes named directly in the product title.

### Transport weight

How much the whole unit weighs when folded or disassembled for lifting into a car. This is the number that decides whether a caregiver can lift it alone. It varies by an order of magnitude: an ultralight manual chair's frame can weigh under 20 lb, while a large outdoor power-chair base can weigh 440 lb or more, so 'it's a wheelchair' says almost nothing about how hard it is to transport. [4] [2]


Used as: filter, sortable, shown on the card. Data: on the listing, backfill cost low. Look for it as: Already a structured field (`sizing.product_weight`, value + unit) in the existing schema.
Chart: position on a horizontal scale.

### Drive wheel position

Where a power wheelchair's powered wheels sit relative to the rider's hips: in front, directly below, or behind. Mid-wheel drive turns tightest, which suits hallways and tables but trades away outdoor capability. Front-wheel drive is stable and turns tight but can fishtail at speed on uneven ground. Rear-wheel drive has predictable, stable handling but the largest turning radius. Buyers who only compare top speed and range miss the trade-off that actually decides how the chair feels to drive every day. [3]

Values: front_wheel_drive, mid_wheel_drive, rear_wheel_drive.

Used as: shown on the card, filter. Data: needs research, backfill cost medium. Look for it as: On the brand spec sheet under 'drive type' or 'base'; not confirmed present on retail listings (fetches to check were blocked).
Rehab-equipment distributor spec pages carry it reliably; retail aggregator listings often don't. Worth backfilling for the top N models per brand rather than the long tail.
Chart: Drive-wheel diagram.

### Battery chemistry

Whether the battery is a sealed lead-acid (AGM/gel) type or lithium-ion. Chemistry is most of the difference in battery weight, and it changes how the device is handled when travelling with it. Buyers who only compare range per charge miss that the same range can come from a much heavier or much lighter pack.

Values: sealed_lead_acid, lithium_ion.

Used as: shown on the card, filter. Data: needs research, backfill cost high. Look for it as: Brand spec sheet, under battery type; rarely stated on general retail listings.
Not wired into any cold-start question yet: no source fetched so far confirms it is a stated, askable spec on either power-wheelchair or scooter listings or brand pages (eight brand-page and airline-battery fetch attempts across two research passes all failed or found no mention). Treat as unconfirmed, not just expensive, until a real source turns up; do not re-add to then_ask without one.

## Numbers worth computing

| Metric | Formula | Why |
|---|---|---|
| Doorway clearance margin (in) | `32 - overall_width` | A positive number means the chair should clear a code-built doorway at its legal minimum width; a negative one means armrests have to come off or the doorway has to be widened. Experts check this before anything about ride quality. [8] |
| Capacity headroom (lb) | `weight_capacity - rider_weight` | Rated capacity is a worst-case engineering limit, not a comfortable working load, so experts look for headroom above the rider's actual weight rather than buying right at the rating.  |

## What you give up

- Titanium and aluminum frames light enough to beat 20 lb cost more to make and are harder to get an insurer to pay for than a heavier standard or lightweight frame. [2]
- Mid-wheel drive's short wheelbase gives the tightest turning radius for indoor use, but the same geometry makes it less effective outdoors than front- or rear-wheel drive. [3] Board branch: "See more outdoor-capable power chairs".
- Folding and travel scooters are light and compact enough to lift into a car, but that same build gives up weight capacity and the ability to climb steep hills that a bulkier scooter has. [5] Board branch: "See more heavy-duty scooters".
- Three wheels turn tighter and cost less, but four wheels are more stable and typically rated for more weight and more battery range. [5] Board branch: "See more four-wheel scooters".

## How to draw it

**Drive-wheel diagram** (other, shows Drive wheel position). A side-view icon showing the large drive wheel in front of, below, or behind a seated silhouette tells a buyer the handling trade-off at a glance, instead of reading three paragraphs of trade-off prose. This is a proposal, nobody draws it this way yet. [3]

**Weight-capacity range** (range, shows Weight capacity, Transport weight). A horizontal scale from light-duty transport chairs through standard chairs to bariatric and heavy-duty models shows at a glance whether a given model is even in the right weight tier, before comparing anything else. This is a proposal, nobody draws it this way yet.

## Words you will meet

- **Self-propelled**. The rider drives the chair by pushing the large rear wheels' push-rims.
- **Attendant-propelled / transport chair**. A lighter chair with small wheels at both ends, pushed from behind by a helper rather than by the rider.
- **Push-rim**. The handrim mounted just inside a self-propelled chair's rear wheel, which the rider grips to turn the wheel.
- **Front/mid/rear-wheel drive**. Where a power wheelchair's motorised wheels sit relative to the rider's hips, which decides how tightly it turns and how it handles outdoors.
- **Bariatric**. Built to carry a heavier rider than a standard chair or scooter is rated for.
- **Transit wheelchair (WC19)**. A wheelchair crash-tested to ANSI/RESNA WC19 or ISO 7176-19 for riding facing forward in a moving vehicle without transferring to a vehicle seat.
- **Sealed lead-acid / AGM battery**. A spill-proof lead-acid battery, the older and heavier of the two common wheelchair and scooter battery types.
- **Tiller**. The steering column at the front of a mobility scooter, with the speed and direction controls built in.
- **Class 2 / Class 3 (UK)**. UK speed classes for scooters and powered wheelchairs: Class 2 is capped at 4 mph and footway-only; Class 3 can reach 8 mph and, registered with the DVLA, can also use the road.

## Where we made a call

- Most standard wheelchairs and scooters cap rider weight around 250 lb; heavier riders need a distinct bariatric or heavy-duty line. (confidence medium). Single source (Wikipedia). Tried four brand bariatric-chair pages for a second source; all returned 404 this run. [4]
- Manual chairs under about 34 lb are called lightweight and under about 30 lb ultralight, by Medicare's own classification. (confidence medium). Single source (MSKTC). Four attempts to reach a second, independent source (CMS's own LCD page, two DME-MAC pages, an HCPCS lookup site) were all blocked or 404'd this run. [2]
- US Medicare splits power wheelchairs into five capability groups, mainly by what the rider's home needs, not by outdoor performance. (confidence medium). Based on a fetched excerpt, not a raw-text read I could confirm myself (the live page is a JavaScript app shell to a plain fetch). Used only for the group logic, not for any numeric threshold. [7]
- A transit (WC19 / ISO 7176-19) crash-tested wheelchair matters specifically for anyone riding facing forward in a moving vehicle without transferring to its seat. (confidence high). Standard's existence and purpose from a primer source (Wikipedia); I could not reach ISO's or RESNA's own text for the standard's content this run. [4]
- In the UK, a scooter or powered wheelchair over 4 mph is Class 3 and needs DVLA registration to use on the road. (confidence high). Regulator's own page states both speed figures directly; Wikipedia independently gives the same 4 mph / 8 mph split. [6] [5]
- Manufacturer battery-range figures are a best-case ceiling, not a guaranteed real-world distance. (confidence low). Ours, not sourced. No fetched source (MSKTC power-chair factsheet, Wikipedia scooter article) states the test protocol behind a range figure; this is general reasoning about rated vs. real-world performance, not a wheelchair-specific fact.

## References

1. [Getting the Right Wheelchair: What the SCI Consumer Needs to Know](https://msktc.org/sci/factsheets/wheelchairs/Getting-The-Right-Wheelchair) (academic). Supports: manual vs power decision is about strength/function, not preference; height and weight drive sizing.
2. [The Manual Wheelchair](https://msktc.org/sci/factsheets/wheelchairs/The-Manual-Wheelchair) (academic). Supports: Medicare lightweight/ultralight weight thresholds; rigid vs folding frame trade-off; tire types; ultralight cost and insurance trade-off.
3. [The Power Wheelchair](https://msktc.org/sci/factsheets/wheelchairs/The-Power-Wheelchair) (academic). Supports: front/mid/rear-wheel drive definitions and trade-offs; controller types.
4. [Wheelchair](https://en.wikipedia.org/wiki/Wheelchair) (primer). Supports: standard weight capacity about 250 lb; ultralight vs outdoor power-chair weight range; indoor/indoor-outdoor/outdoor power-chair classes; WC19/ISO 7176-19 transit standard exists.
5. [Mobility scooter](https://en.wikipedia.org/wiki/Mobility_scooter) (primer). Supports: front vs rear-wheel drive scooter weight capacities; 3-wheel vs 4-wheel vs folding/travel trade-offs; UK class exists (registration); travel, mid-range, and heavy-duty scooter tiers map to indoor/mixed/outdoor use.
6. [Classes of mobility scooter and powered wheelchair](https://www.gov.uk/mobility-scooters-and-powered-wheelchairs-rules/classes) (regulator). Supports: Class 2 capped at 4 mph, footway only; Class 3 up to 8 mph, DVLA-registered for road use.
7. [LCD - Power Mobility Devices (L33789)](https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33789) (regulator). Supports: Medicare's power-wheelchair group structure and its basis in home upper-extremity function.
8. [2010 ADA Standards for Accessible Design](https://www.access-board.gov/files/ada/ADA-Standards.pdf) (regulator). Supports: 32 in minimum doorway clear width; 36 in minimum hallway clear width.