scooter / default rider 183 cm
Aprilia SR 50 R vs Vespa PX125 ergonomics
Aprilia SR 50 R and Vespa PX125 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
Vespa PX125
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 Vespa PX125 lists 810 mm — a 10 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 PX125 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 | Vespa PX125 |
|---|---|---|
| Seat height | 820 mm | 810 mm |
| Wheelbase | 1,260 mm | 1,260 mm |
| Wet weight | 108 kg | 101 kg |
| Displacement | 50 cc | 123 cc |
Posture metrics
Knee angle
- Aprilia SR 50 R
- Sport (57.7 deg)
- Vespa PX125
- Sport (57.7 deg)
Hip angle
- Aprilia SR 50 R
- Neutral (98.1 deg)
- Vespa PX125
- Neutral (98.1 deg)
Elbow angle
- Aprilia SR 50 R
- Relaxed (143.3 deg)
- Vespa PX125
- Relaxed (143.3 deg)
Torso lean
- Aprilia SR 50 R
- Neutral (9.2 deg)
- Vespa PX125
- Neutral (9.2 deg)