Side by side
Comparing XSTO M4 Pro, XSTO X12
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 | Self-balancing powerchair XSTO M4 Pro | Stair-climbing mobility robot XSTO X12 |
|---|---|---|
| At a glance | ||
| In short | The self-balancing M4 idea, with more range, more support and powered seat tilt. | A stair-climbing, all-terrain mobility robot that keeps its seat level. |
| Good for | At home, Travel, Outdoors, Tight spaces | Stairs, Outdoors, Rough ground, At home |
| Climbs stairs | No | Yes, with you seated |
| UK class | Not stated by XSTO | Not stated by XSTO |
| UK sellers found | Yes | Yes |
| Performance | ||
| Maximum load | 150 kg (330.7 lb)Maximum load (user plus luggage) | 136 kgMaximum load (user plus luggage) |
| Range | 26 km (16.2 miles)Quoted range | 35 kmRange on flat ground |
| Top speed | 6 km/h (3.7 mph)Maximum speed | 0–12 km/hSpeed range |
| Slope / climbing | 15°Maximum slope | 15° on wheels, 40° on tracksClimbing ability |
| Obstacle clearance | 85 mm forwards / 50 mm reversing (3.35 / 1.97 in) | 100 mm front / 220 mm rear |
| Gap crossing width | 100 mm (3.9 in) | Under 180 mm on wheels, under 300 mm on tracks |
| Turning | 825 mm (32.5 in)Minimum turning radius | Not listed |
| Stair-climbing speed | Not listed | 25 steps a minute up, 30 down |
| Stairs | ||
| Step height | Not listed | Step height under 200 mm, stair angle under 35°Compatible steps |
| Landing space needed | Not listed | L-shaped turn 1400 × 1400 mm; U-shaped turn 1400 × 2000 mm |
| Drive modes | Not listed | Four-wheel mode, wheel-and-track hybrid mode, twin-track mode |
| Dimensions | ||
| Weight | 60.1 kg (132.5 lb)Weight without battery | 115 kg (UK distributor quotes 112.8 kg)Weight without batteries |
| Folded (L × W × H) | 1040 × 592 × 770 mm (40.9 × 23.3 × 30.3 in) | 1200 × 685 × 617 mm (store page; 1185 mm long on the corporate page) |
| Unfolded (L × W × H) | 1120 × 592 × 1040 mm (44.1 × 23.3 × 40.9 in) | 1210 × 685 × 1550 mm |
| At highest seat position (L × W × H) | 1120 × 592 × 1200 mm (44.1 × 23.3 × 47.2 in) | Not listed |
| Seating | ||
| Seat height | 450–730 mm (17.7–28.7 in)Seat height range | 490–762 mmSeat height (lifting range) |
| Seat tilt | 0–20°, default 7° | -8° to 40° |
| Backrest recline | Up to 135° (store page) / 125° (corporate page) | 90–121° |
| Seat cushion sizes | S 360 × 380 mm, M 430 × 455 mm, L 500 × 530 mm | Not listed |
| Armrest adjustment | Up, down, forwards, backwards and rotation | Not listed |
| Legrest | Quick-release | Manual |
| Footrest | Integrated folding pedals | Not listed |
| Seat size range | Not listed | Depth 380–435 mm; width 390–440 mm |
| Boarding | Not listed | From the front or the side |
| Battery | ||
| Battery | Lithium, 25.2 V 23.8 Ah | Two lithium batteries, 25.2 V 25.6 Ah eachBatteries |
| Charge time | 6 hours | 6.5 hours × 2 |
| Controls | ||
| Control methods | Joystick, Bluetooth remote, smartphone app | Not listed |
| Joystick mounting | Quick left/right swap, swing-away | Not listed |
| Wheels | ||
| Front wheels | Omni-directional | Not listed |
| Rear wheels | 10-inch solid tyres | Not listed |
| Lighting | ||
| Lighting system | Turn signals, brake lights, headlight | Not listed |
| Safety | ||
| Sensors | Not listed | LiDAR collision warning, rear parking radar, alert for a drop or step ahead |
| Protection | ||
| Water protection rating | IPX4 | Not listed |
| Next steps | ||
| Find out more | Full details for XSTO M4 Pro XSTO’s page for XSTO M4 Pro (opens in a new tab) | Full details for XSTO X12 XSTO’s page for XSTO X12 (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.