moped / default rider 183 cm
Sachs MadAss 50 vs Tomos Flexer 25 SM ergonomics
Sachs MadAss 50 and Tomos Flexer 25 SM 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
Sachs MadAss 50
All contacts reached
Tomos Flexer 25 SM
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 Sachs MadAss 50 lists a 835 mm seat; the Tomos Flexer 25 SM lists 800 mm — a 35 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 Tomos Flexer 25 SM 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 | Sachs MadAss 50 | Tomos Flexer 25 SM |
|---|---|---|
| Seat height | 835 mm | 800 mm |
| Wheelbase | 1,235 mm | 1,115 mm |
| Wet weight | - | - |
| Displacement | 50 cc | 49 cc |
Posture metrics
Knee angle
- Sachs MadAss 50
- Sport (57.6 deg)
- Tomos Flexer 25 SM
- Sport (57.4 deg)
Hip angle
- Sachs MadAss 50
- Neutral (98.8 deg)
- Tomos Flexer 25 SM
- Neutral (101.7 deg)
Elbow angle
- Sachs MadAss 50
- Relaxed (143.3 deg)
- Tomos Flexer 25 SM
- Relaxed (143.3 deg)
Torso lean
- Sachs MadAss 50
- Neutral (8.8 deg)
- Tomos Flexer 25 SM
- Neutral (6.9 deg)