moped / default rider 183 cm
Aprilia SR 50 R vs Sachs MadAss 50 ergonomics
Aprilia SR 50 R and Sachs MadAss 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
Aprilia SR 50 R
All contacts reached
Sachs MadAss 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 Aprilia SR 50 R lists a 820 mm seat; the Sachs MadAss 50 lists 835 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 Aprilia SR 50 R 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 | Aprilia SR 50 R | Sachs MadAss 50 |
|---|---|---|
| Seat height | 820 mm | 835 mm |
| Wheelbase | 1,260 mm | 1,235 mm |
| Wet weight | 108 kg | - |
| Displacement | 49 cc | 50 cc |
Posture metrics
Knee angle
- Aprilia SR 50 R
- Sport (57.7 deg)
- Sachs MadAss 50
- Sport (57.6 deg)
Hip angle
- Aprilia SR 50 R
- Neutral (98.1 deg)
- Sachs MadAss 50
- Neutral (98.8 deg)
Elbow angle
- Aprilia SR 50 R
- Relaxed (143.3 deg)
- Sachs MadAss 50
- Relaxed (143.3 deg)
Torso lean
- Aprilia SR 50 R
- Neutral (9.2 deg)
- Sachs MadAss 50
- Neutral (8.8 deg)