cafe-racer / default rider 183 cm
Bluroc Motorcycles Spirit 125 vs Ducati 900SS ergonomics
Bluroc Motorcycles Spirit 125 and Ducati 900SS 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
Bluroc Motorcycles Spirit 125
All contacts reached
Ducati 900SS
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 Bluroc Motorcycles Spirit 125 lists a 750 mm seat; the Ducati 900SS lists 760 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 Bluroc Motorcycles Spirit 125 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 | Bluroc Motorcycles Spirit 125 | Ducati 900SS |
|---|---|---|
| Seat height | 750 mm | 760 mm |
| Wheelbase | 1,310 mm | 1,500 mm |
| Wet weight | - | - |
| Displacement | 125 cc | 864 cc |
Posture metrics
Knee angle
- Bluroc Motorcycles Spirit 125
- Sport (57.8 deg)
- Ducati 900SS
- Sport (58.2 deg)
Hip angle
- Bluroc Motorcycles Spirit 125
- Neutral (97.0 deg)
- Ducati 900SS
- Neutral (92.9 deg)
Elbow angle
- Bluroc Motorcycles Spirit 125
- Relaxed (143.3 deg)
- Ducati 900SS
- Relaxed (143.3 deg)
Torso lean
- Bluroc Motorcycles Spirit 125
- Neutral (10.0 deg)
- Ducati 900SS
- Neutral (12.8 deg)