cruiser / default rider 183 cm
BMW R 18 vs Triumph America ergonomics
BMW R 18 and Triumph America land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
BMW R 18
92Comfortable
All contacts reached
Triumph America
92Comfortable
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The BMW R 18 has a 690 mm seat; the Triumph America sits at 690 mm, within a few millimetres of each other. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 69 cm for the BMW R 18 and 69 cm for the Triumph America.
Geometry snapshot
| Spec | BMW R 18 | Triumph America |
|---|---|---|
| Seat height | 690 mm | 690 mm |
| Wheelbase | 1,731 mm | 1,610 mm |
| Wet weight | 345 kg | - |
| Displacement | 1,802 cc | 865 cc |
Posture metrics
Knee angle
- BMW R 18
- Open (128.8 deg)
- Triumph America
- Open (117.3 deg)
Hip angle
- BMW R 18
- Sport (81.7 deg)
- Triumph America
- Sport (79.4 deg)
Elbow angle
- BMW R 18
- Relaxed (143.3 deg)
- Triumph America
- Relaxed (143.3 deg)
Torso lean
- BMW R 18
- Neutral (11.4 deg)
- Triumph America
- Neutral (9.6 deg)