Side by side
Comparing XSTO X12 Pro, XSTO M4 Pro
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 Pro |
|---|---|---|
| At a glance | ||
| In short | The stair-climbing X12 with a powered, elevating legrest. | The self-balancing M4 idea, with more range, more support and powered seat tilt. |
| Good for | Stairs, Outdoors, Rough ground, At home | At home, Travel, Outdoors, Tight spaces |
| 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) | 150 kg (330.7 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 | 26 km (16.2 miles)Quoted range |
| Stair-climbing speed | 25 steps a minute up, 30 down | Not listed |
| Slope / climbing | 15° on wheels, 40° on tracksClimbing ability | 15°Maximum slope |
| Obstacle clearance | 100 mm front / 220 mm rear | 85 mm forwards / 50 mm reversing (3.35 / 1.97 in) |
| Gap crossing width | Under 180 mm on wheels, under 300 mm on tracks | 100 mm (3.9 in) |
| Turning | Not listed | 825 mm (32.5 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 | 60.1 kg (132.5 lb)Weight without battery |
| Folded (L × W × H) | 1200 × 685 × 617 mm (store page; 1185 mm long on the corporate page) | 1040 × 592 × 770 mm (40.9 × 23.3 × 30.3 in) |
| Unfolded (L × W × H) | 1210 × 685 × 1550 mm | 1120 × 592 × 1040 mm (44.1 × 23.3 × 40.9 in) |
| At highest seat position (L × W × H) | Not listed | 1120 × 592 × 1200 mm (44.1 × 23.3 × 47.2 in) |
| Seating | ||
| Legrest | Electric (powered elevating) | Quick-release |
| Seat height | 490–762 mmSeat height (lifting range) | 450–730 mm (17.7–28.7 in)Seat height range |
| Seat tilt | -8° to 40° | 0–20°, default 7° |
| Backrest recline | 90–121° | Up to 135° (store page) / 125° (corporate page) |
| Seat size range | Depth 380–435 mm; width 390–440 mm | Not listed |
| Boarding | From the front or the side | Not listed |
| Seat cushion sizes | Not listed | S 360 × 380 mm, M 430 × 455 mm, L 500 × 530 mm |
| Armrest adjustment | Not listed | Up, down, forwards, backwards and rotation |
| Footrest | Not listed | Integrated folding pedals |
| Battery | ||
| Battery | Two lithium batteries, 25.2 V 25.6 Ah eachBatteries | Lithium, 25.2 V 23.8 Ah |
| Charge time | 6.5 hours × 2 | 6 hours |
| Controls | ||
| Control methods | Not listed | Joystick, Bluetooth remote, smartphone app |
| Joystick mounting | Not listed | Quick left/right swap, swing-away |
| Wheels | ||
| Front wheels | Not listed | Omni-directional |
| Rear wheels | Not listed | 10-inch solid tyres |
| Lighting | ||
| Lighting system | Not listed | Turn signals, brake lights, headlight |
| 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 Pro XSTO’s page for XSTO M4 Pro (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.