moped / default rider 183 cm
SYM Symphony ST 125 vs Yamaha Aerox R 50 ergonomics
SYM Symphony ST 125 and Yamaha Aerox R 50 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
SYM Symphony ST 125
All contacts reached
Yamaha Aerox R 50
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 SYM Symphony ST 125 lists a 800 mm seat; the Yamaha Aerox R 50 lists 815 mm — a 15 mm difference. 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.
On seat height alone, the SYM Symphony ST 125 has the easier modeled ground reach. Load your measurements into the simulator to compare the model, then verify both motorcycles in person.
Geometry snapshot
| Spec | SYM Symphony ST 125 | Yamaha Aerox R 50 |
|---|---|---|
| Seat height | 800 mm | 815 mm |
| Wheelbase | 1,385 mm | 1,275 mm |
| Wet weight | 132 kg | 97 kg |
| Displacement | 125 cc | 49 cc |
Posture metrics
Knee angle
- SYM Symphony ST 125
- Sport (57.9 deg)
- Yamaha Aerox R 50
- Sport (57.7 deg)
Hip angle
- SYM Symphony ST 125
- Neutral (95.4 deg)
- Yamaha Aerox R 50
- Neutral (98.0 deg)
Elbow angle
- SYM Symphony ST 125
- Relaxed (143.3 deg)
- Yamaha Aerox R 50
- Relaxed (143.3 deg)
Torso lean
- SYM Symphony ST 125
- Neutral (11.1 deg)
- Yamaha Aerox R 50
- Neutral (9.4 deg)