supermoto / default rider 183 cm
Aprilia SX 125 vs Beta Motor M4 Motard ergonomics
Aprilia SX 125 and Beta Motor M4 Motard have modeled posture scores within three points for the 183 cm default rider. Treat this as a planning estimate; posture preference, data confidence, and a real test sit still matter.
Modeled fit comparison
Aprilia SX 125
All contacts reached
Beta Motor M4 Motard
All contacts reached
The modeled scores are within three points, so the result does not distinguish a higher-scoring bike. Treat the result as a planning estimate and compare each bike's geometry confidence before a real test sit.
Rider fit: reaching the ground
The Aprilia SX 125 lists a 870 mm seat; the Beta Motor M4 Motard lists 870 mm, within a few millimetres of each other. Seat height is only a first-pass ground-reach input. It does not establish safety or actual foot contact. Seat width, suspension sag, boots, mobility, load, and individual proportions can materially change the result.
Geometry snapshot
| Spec | Aprilia SX 125 | Beta Motor M4 Motard |
|---|---|---|
| Seat height | 870 mm | 870 mm |
| Wheelbase | 1,480 mm | 1,410 mm |
| Wet weight | 125 kg | - |
| Displacement | 125 cc | 349 cc |
Posture metrics
Knee angle
- Aprilia SX 125
- Sport (58.1 deg)
- Beta Motor M4 Motard
- Sport (58.0 deg)
Hip angle
- Aprilia SX 125
- Neutral (93.3 deg)
- Beta Motor M4 Motard
- Neutral (94.8 deg)
Elbow angle
- Aprilia SX 125
- Relaxed (143.3 deg)
- Beta Motor M4 Motard
- Relaxed (143.3 deg)
Torso lean
- Aprilia SX 125
- Neutral (12.5 deg)
- Beta Motor M4 Motard
- Neutral (11.5 deg)