moped / default rider 183 cm
SYM Symphony ST 125 vs Yamaha Aerox R 50 ergonomics
SYM Symphony ST 125 and Yamaha Aerox R 50 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
SYM Symphony ST 125
All contacts reached
Yamaha Aerox R 50
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The SYM Symphony ST 125 has a 800 mm seat; the Yamaha Aerox R 50 sits at 815 mm — a 15 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 80 cm for the SYM Symphony ST 125 and 82 cm for the Yamaha Aerox R 50.
That makes the SYM Symphony ST 125 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Yamaha Aerox R 50 gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.
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)