cruiser / default rider 183 cm
Harley-Davidson Forty-Eight vs Yamaha Royal Star ergonomics
Harley-Davidson Forty-Eight and Yamaha Royal Star 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
Harley-Davidson Forty-Eight
All contacts reached
Yamaha Royal Star
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 Harley-Davidson Forty-Eight lists a 710 mm seat; the Yamaha Royal Star lists 710 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 | Harley-Davidson Forty-Eight | Yamaha Royal Star |
|---|---|---|
| Seat height | 710 mm | 710 mm |
| Wheelbase | 1,495 mm | 1,695 mm |
| Wet weight | 252 kg | 330 kg |
| Displacement | 1,202 cc | 1,294 cc |
Posture metrics
Knee angle
- Harley-Davidson Forty-Eight
- Open (107.9 deg)
- Yamaha Royal Star
- Open (125.1 deg)
Hip angle
- Harley-Davidson Forty-Eight
- Sport (78.4 deg)
- Yamaha Royal Star
- Sport (80.8 deg)
Elbow angle
- Harley-Davidson Forty-Eight
- Relaxed (143.3 deg)
- Yamaha Royal Star
- Relaxed (143.3 deg)
Torso lean
- Harley-Davidson Forty-Eight
- Neutral (7.8 deg)
- Yamaha Royal Star
- Neutral (10.9 deg)