standard / default rider 183 cm
BMW K 100 vs BMW R90/6 ergonomics
BMW K 100 and BMW R90/6 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
BMW K 100
All contacts reached
BMW R90/6
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 BMW K 100 lists a 810 mm seat; the BMW R90/6 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 | BMW K 100 | BMW R90/6 |
|---|---|---|
| Seat height | 810 mm | 810 mm |
| Wheelbase | 1,516 mm | 1,465 mm |
| Wet weight | - | 209 kg |
| Displacement | 987 cc | 898 cc |
Posture metrics
Knee angle
- BMW K 100
- Sport (58.2 deg)
- BMW R90/6
- Sport (58.1 deg)
Hip angle
- BMW K 100
- Neutral (92.5 deg)
- BMW R90/6
- Neutral (95.4 deg)
Elbow angle
- BMW K 100
- Relaxed (143.3 deg)
- BMW R90/6
- Relaxed (143.3 deg)
Torso lean
- BMW K 100
- Neutral (13.0 deg)
- BMW R90/6
- Neutral (10.6 deg)