supermoto / default rider 183 cm
Derbi Senda X-Treme 50 SM vs KTM 640 Duke II ergonomics
Derbi Senda X-Treme 50 SM and KTM 640 Duke II 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
Derbi Senda X-Treme 50 SM
All contacts reached
KTM 640 Duke II
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 Derbi Senda X-Treme 50 SM lists a 900 mm seat; the KTM 640 Duke II lists 900 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 | Derbi Senda X-Treme 50 SM | KTM 640 Duke II |
|---|---|---|
| Seat height | 900 mm | 900 mm |
| Wheelbase | 1,355 mm | 1,460 mm |
| Wet weight | - | - |
| Displacement | 50 cc | 625 cc |
Posture metrics
Knee angle
- Derbi Senda X-Treme 50 SM
- Sport (57.8 deg)
- KTM 640 Duke II
- Sport (58.1 deg)
Hip angle
- Derbi Senda X-Treme 50 SM
- Neutral (96.1 deg)
- KTM 640 Duke II
- Neutral (93.7 deg)
Elbow angle
- Derbi Senda X-Treme 50 SM
- Relaxed (143.3 deg)
- KTM 640 Duke II
- Relaxed (143.3 deg)
Torso lean
- Derbi Senda X-Treme 50 SM
- Neutral (10.6 deg)
- KTM 640 Duke II
- Neutral (12.2 deg)