touring / default rider 183 cm
BMW R100RT vs Norton Motorcycles Commando 850 Interstate Mk3 ergonomics
BMW R100RT and Norton Motorcycles Commando 850 Interstate Mk3 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 R100RT
All contacts reached
Norton Motorcycles Commando 850 Interstate Mk3
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 R100RT has a 820 mm seat; the Norton Motorcycles Commando 850 Interstate Mk3 sits at 838 mm — a 18 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 82 cm for the BMW R100RT and 84 cm for the Norton Motorcycles Commando 850 Interstate Mk3.
That makes the BMW R100RT the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Norton Motorcycles Commando 850 Interstate Mk3 gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.
Geometry snapshot
| Spec | BMW R100RT | Norton Motorcycles Commando 850 Interstate Mk3 |
|---|---|---|
| Seat height | 820 mm | 838 mm |
| Wheelbase | 1,465 mm | 1,441 mm |
| Wet weight | 234 kg | - |
| Displacement | 980 cc | 828 cc |
Posture metrics
Knee angle
- BMW R100RT
- Sport (74.7 deg)
- Norton Motorcycles Commando 850 Interstate Mk3
- Sport (74.1 deg)
Hip angle
- BMW R100RT
- Sport (83.3 deg)
- Norton Motorcycles Commando 850 Interstate Mk3
- Sport (83.8 deg)
Elbow angle
- BMW R100RT
- Relaxed (143.3 deg)
- Norton Motorcycles Commando 850 Interstate Mk3
- Relaxed (143.3 deg)
Torso lean
- BMW R100RT
- Neutral (8.4 deg)
- Norton Motorcycles Commando 850 Interstate Mk3
- Neutral (8.0 deg)