cruiser / default rider 183 cm
BMW R 18 vs Yamaha Road Star Warrior ergonomics
BMW R 18 and Yamaha Road Star Warrior 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
All contacts reached
Yamaha Road Star Warrior
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 lists a 719 mm seat; the Yamaha Road Star Warrior lists 715 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 R 18 | Yamaha Road Star Warrior |
|---|---|---|
| Seat height | 719 mm | 715 mm |
| Wheelbase | 1,730 mm | 1,666 mm |
| Wet weight | 345 kg | 298 kg |
| Displacement | 1,802 cc | 1,670 cc |
Posture metrics
Knee angle
- BMW R 18
- Open (128.6 deg)
- Yamaha Road Star Warrior
- Open (122.1 deg)
Hip angle
- BMW R 18
- Sport (81.6 deg)
- Yamaha Road Star Warrior
- Sport (80.2 deg)
Elbow angle
- BMW R 18
- Relaxed (143.3 deg)
- Yamaha Road Star Warrior
- Relaxed (143.3 deg)
Torso lean
- BMW R 18
- Neutral (11.4 deg)
- Yamaha Road Star Warrior
- Neutral (10.5 deg)