Side by side
Comparing XSTO X12 Pro, XSTO M4
Choose two or three models. Rows are lined up by what they measure, and every figure is XSTO’s own – where a model uses a different label, it is shown in small print.
| Specification | Stair-climbing mobility robot XSTO X12 Pro | Self-balancing powerchair XSTO M4 |
|---|---|---|
| At a glance | ||
| In short | The stair-climbing X12 with a powered, elevating legrest. | A compact, self-levelling powerchair that folds down for the car boot. |
| Good for | Stairs, Outdoors, Rough ground, At home | At home, Travel, Tight spaces, Outdoors |
| Climbs stairs | Yes, with you seated | No |
| UK class | Not stated by XSTO | Not stated by XSTO |
| UK sellers found | Yes | Yes |
| Performance | ||
| Maximum load | 136 kgMaximum load (user plus luggage) | 115 kg (253.5 lb)Maximum load (user plus luggage) |
| Top speed | 0–12 km/hSpeed range | 6 km/h (3.7 mph)Maximum speed |
| Range | 35 kmRange on flat ground | 15 km (9.3 miles)Quoted range |
| Stair-climbing speed | 25 steps a minute up, 30 down | Not listed |
| Slope / climbing | 15° on wheels, 40° on tracksClimbing ability | 10°Maximum slope |
| Obstacle clearance | 100 mm front / 220 mm rear | 50 mm (2 in) |
| Gap crossing width | Under 180 mm on wheels, under 300 mm on tracks | 100 mm (3.9 in) |
| Turning | Not listed | 820 mm (32.3 in)Minimum turning radius |
| Stairs | ||
| Step height | Step height under 200 mm, stair angle under 35°Compatible steps | Not listed |
| Landing space needed | L-shaped turn 1400 × 1400 mm; U-shaped turn 1400 × 2000 mm | Not listed |
| Drive modes | Four-wheel mode, wheel-and-track hybrid mode, twin-track mode | Not listed |
| Dimensions | ||
| Weight | 116 kg (UK distributor quotes about 115.8 kg)Weight without batteries | 51.5 kg (113.5 lb)Weight without battery |
| Folded (L × W × H) | 1200 × 685 × 617 mm (store page; 1185 mm long on the corporate page) | 1040 × 580 × 570 mm (40.9 × 22.8 × 22.4 in) |
| Unfolded (L × W × H) | 1210 × 685 × 1550 mm | 1035 × 580 × 930 mm (40.8 × 22.8 × 36.6 in) |
| At highest seat position (L × W × H) | Not listed | 980 × 580 × 1080 mm (38.6 × 22.8 × 42.5 in) |
| Seating | ||
| Legrest | Electric (powered elevating) | Manual folding |
| Seat height | 490–762 mmSeat height (lifting range) | 347–650 mm (13.7–25.6 in)Seat height range |
| Seat tilt | -8° to 40° | Not listed |
| Backrest recline | 90–121° | Not listed |
| Seat size range | Depth 380–435 mm; width 390–440 mm | Not listed |
| Boarding | From the front or the side | Not listed |
| Armrest adjustment | Not listed | Up and down |
| Footrest | Not listed | Fixed pedals |
| Battery | ||
| Battery | Two lithium batteries, 25.2 V 25.6 Ah eachBatteries | Lithium, 25.55 V 15.5 Ah (listed in the box contents as 24 V 15.6 Ah) |
| Charge time | 6.5 hours × 2 | 4 hours (spec table) |
| Optional travel battery | Not listed | 24 V 10.4 Ah, sold separately |
| Controls | ||
| Control methods | Not listed | Joystick, Bluetooth remote, smartphone app |
| Joystick mounting | Not listed | Interchangeable left or right |
| Wheels | ||
| Front wheels | Not listed | Omni-directional |
| Rear wheels | Not listed | 10-inch solid tyres |
| Lighting | ||
| Lighting system | Not listed | Not listed for the M4 |
| Safety | ||
| Sensors | LiDAR collision warning, rear parking radar, alert for a drop or step ahead | Not listed |
| Protection | ||
| Water protection rating | Not listed | IPX4 |
| Next steps | ||
| Find out more | Full details for XSTO X12 Pro XSTO’s page for XSTO X12 Pro (opens in a new tab) | Full details for XSTO M4 XSTO’s page for XSTO M4 (opens in a new tab) |
Figures are XSTO’s published specifications, checked September 2026. “Not listed” means we did not find that figure for that model. Always confirm the details that matter to you with the seller.