naked / default rider 183 cm
Aprilia Shiver 900 vs Ducati Monster 821 ergonomics
Aprilia Shiver 900 and Ducati Monster 821 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 Shiver 900
All contacts reached
Ducati Monster 821
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 Shiver 900 lists a 810 mm seat; the Ducati Monster 821 lists 810 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 | Aprilia Shiver 900 | Ducati Monster 821 |
|---|---|---|
| Seat height | 810 mm | 810 mm |
| Wheelbase | 1,465 mm | 1,480 mm |
| Wet weight | 218 kg | 206 kg |
| Displacement | 896 cc | 821 cc |
Posture metrics
Knee angle
- Aprilia Shiver 900
- Sport (61.8 deg)
- Ducati Monster 821
- Sport (61.8 deg)
Hip angle
- Aprilia Shiver 900
- Neutral (91.1 deg)
- Ducati Monster 821
- Neutral (90.8 deg)
Elbow angle
- Aprilia Shiver 900
- Relaxed (143.3 deg)
- Ducati Monster 821
- Relaxed (143.3 deg)
Torso lean
- Aprilia Shiver 900
- Neutral (13.1 deg)
- Ducati Monster 821
- Neutral (13.3 deg)