dual-sport / default rider 183 cm
Beta Motor Alp 4.0 vs BMW G 650 GS Sertao ergonomics
Beta Motor Alp 4.0 and BMW G 650 GS Sertao land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Beta Motor Alp 4.0
95Comfortable
All contacts reached
BMW G 650 GS Sertao
95Comfortable
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Beta Motor Alp 4.0 has a 864 mm seat; the BMW G 650 GS Sertao sits at 861 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 86 cm for the Beta Motor Alp 4.0 and 86 cm for the BMW G 650 GS Sertao.
Geometry snapshot
| Spec | Beta Motor Alp 4.0 | BMW G 650 GS Sertao |
|---|---|---|
| Seat height | 864 mm | 861 mm |
| Wheelbase | 1,440 mm | 1,484 mm |
| Wet weight | - | 193 kg |
| Displacement | 350 cc | 652 cc |
Posture metrics
Knee angle
- Beta Motor Alp 4.0
- Sport (67.5 deg)
- BMW G 650 GS Sertao
- Sport (67.5 deg)
Hip angle
- Beta Motor Alp 4.0
- Neutral (107.9 deg)
- BMW G 650 GS Sertao
- Neutral (107.1 deg)
Elbow angle
- Beta Motor Alp 4.0
- Relaxed (143.3 deg)
- BMW G 650 GS Sertao
- Relaxed (143.3 deg)
Torso lean
- Beta Motor Alp 4.0
- Neutral (6.4 deg)
- BMW G 650 GS Sertao
- Neutral (7.0 deg)