scooter / default rider 183 cm
BMW C 600 Sport vs Vespa ET4 150 ergonomics
BMW C 600 Sport and Vespa ET4 150 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
BMW C 600 Sport
All contacts reached
Vespa ET4 150
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 BMW C 600 Sport lists a 810 mm seat; the Vespa ET4 150 lists 805 mm — a 5 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 Vespa ET4 150 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 | BMW C 600 Sport | Vespa ET4 150 |
|---|---|---|
| Seat height | 810 mm | 805 mm |
| Wheelbase | 1,591 mm | 1,280 mm |
| Wet weight | 249 kg | - |
| Displacement | 647 cc | 150 cc |
Posture metrics
Knee angle
- BMW C 600 Sport
- Sport (58.4 deg)
- Vespa ET4 150
- Sport (57.7 deg)
Hip angle
- BMW C 600 Sport
- Neutral (91.0 deg)
- Vespa ET4 150
- Neutral (97.7 deg)
Elbow angle
- BMW C 600 Sport
- Relaxed (143.3 deg)
- Vespa ET4 150
- Relaxed (143.3 deg)
Torso lean
- BMW C 600 Sport
- Neutral (14.0 deg)
- Vespa ET4 150
- Neutral (9.5 deg)