touring / default rider 183 cm
BMW R 18 Classic vs Harley-Davidson Ultra Limited ergonomics
BMW R 18 Classic and Harley-Davidson Ultra Limited 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 R 18 Classic
All contacts reached
Harley-Davidson Ultra Limited
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 R 18 Classic lists a 710 mm seat; the Harley-Davidson Ultra Limited lists 699 mm — a 11 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 Harley-Davidson Ultra Limited 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 | BMW R 18 Classic | Harley-Davidson Ultra Limited |
|---|---|---|
| Seat height | 710 mm | 699 mm |
| Wheelbase | 1,731 mm | 1,625 mm |
| Wet weight | 365 kg | 416 kg |
| Displacement | 1,802 cc | 1,868 cc |
Posture metrics
Knee angle
- BMW R 18 Classic
- Neutral (80.4 deg)
- Harley-Davidson Ultra Limited
- Neutral (78.0 deg)
Hip angle
- BMW R 18 Classic
- Sport (78.2 deg)
- Harley-Davidson Ultra Limited
- Sport (80.1 deg)
Elbow angle
- BMW R 18 Classic
- Relaxed (143.3 deg)
- Harley-Davidson Ultra Limited
- Relaxed (143.3 deg)
Torso lean
- BMW R 18 Classic
- Neutral (11.8 deg)
- Harley-Davidson Ultra Limited
- Neutral (10.5 deg)