scooter / default rider 183 cm
Piaggio X9 500 vs SYM Jet X 125 ergonomics
Piaggio X9 500 and SYM Jet X 125 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
Piaggio X9 500
All contacts reached
SYM Jet X 125
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 Piaggio X9 500 lists a 780 mm seat; the SYM Jet X 125 lists 780 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 | Piaggio X9 500 | SYM Jet X 125 |
|---|---|---|
| Seat height | 780 mm | 780 mm |
| Wheelbase | 1,529 mm | 1,350 mm |
| Wet weight | 210 kg | 140 kg |
| Displacement | 460 cc | 125 cc |
Posture metrics
Knee angle
- Piaggio X9 500
- Sport (58.2 deg)
- SYM Jet X 125
- Sport (57.8 deg)
Hip angle
- Piaggio X9 500
- Neutral (92.4 deg)
- SYM Jet X 125
- Neutral (96.2 deg)
Elbow angle
- Piaggio X9 500
- Relaxed (143.3 deg)
- SYM Jet X 125
- Relaxed (143.3 deg)
Torso lean
- Piaggio X9 500
- Neutral (13.2 deg)
- SYM Jet X 125
- Neutral (10.6 deg)