moped / default rider 183 cm
Sachs MadAss 50 vs Yamaha Aerox R 50 ergonomics
Sachs MadAss 50 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
Sachs MadAss 50
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 Sachs MadAss 50 has a 835 mm seat; the Yamaha Aerox R 50 sits at 815 mm — a 20 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 84 cm for the Sachs MadAss 50 and 82 cm for the Yamaha Aerox R 50.
That makes the Yamaha Aerox R 50 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Sachs MadAss 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 | Sachs MadAss 50 | Yamaha Aerox R 50 |
|---|---|---|
| Seat height | 835 mm | 815 mm |
| Wheelbase | 1,235 mm | 1,275 mm |
| Wet weight | - | 97 kg |
| Displacement | 50 cc | 49 cc |
Posture metrics
Knee angle
- Sachs MadAss 50
- Sport (57.6 deg)
- Yamaha Aerox R 50
- Sport (57.7 deg)
Hip angle
- Sachs MadAss 50
- Neutral (98.8 deg)
- Yamaha Aerox R 50
- Neutral (98.0 deg)
Elbow angle
- Sachs MadAss 50
- Relaxed (143.3 deg)
- Yamaha Aerox R 50
- Relaxed (143.3 deg)
Torso lean
- Sachs MadAss 50
- Neutral (8.8 deg)
- Yamaha Aerox R 50
- Neutral (9.4 deg)