moped / default rider 183 cm
Piaggio Fly 50 4V vs Vespa Primavera RED 50 ergonomics
Piaggio Fly 50 4V and Vespa Primavera RED 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
Piaggio Fly 50 4V
All contacts reached
Vespa Primavera RED 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 Piaggio Fly 50 4V lists a 785 mm seat; the Vespa Primavera RED 50 lists 785 mm, within a few millimetres of each other. 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.
Geometry snapshot
| Spec | Piaggio Fly 50 4V | Vespa Primavera RED 50 |
|---|---|---|
| Seat height | 785 mm | 785 mm |
| Wheelbase | 1,331 mm | 1,330 mm |
| Wet weight | - | 115 kg |
| Displacement | 49 cc | 50 cc |
Posture metrics
Knee angle
- Piaggio Fly 50 4V
- Sport (57.8 deg)
- Vespa Primavera RED 50
- Sport (57.8 deg)
Hip angle
- Piaggio Fly 50 4V
- Neutral (96.7 deg)
- Vespa Primavera RED 50
- Neutral (96.6 deg)
Elbow angle
- Piaggio Fly 50 4V
- Relaxed (143.3 deg)
- Vespa Primavera RED 50
- Relaxed (143.3 deg)
Torso lean
- Piaggio Fly 50 4V
- Neutral (10.3 deg)
- Vespa Primavera RED 50
- Neutral (10.3 deg)