supermoto / default rider 183 cm
Rieju Marathon 125 SM Pro vs Yamaha XT 660 R Supermotard ergonomics
Rieju Marathon 125 SM Pro and Yamaha XT 660 R Supermotard 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
Rieju Marathon 125 SM Pro
All contacts reached
Yamaha XT 660 R Supermotard
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 Rieju Marathon 125 SM Pro lists a 876 mm seat; the Yamaha XT 660 R Supermotard lists 875 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 | Rieju Marathon 125 SM Pro | Yamaha XT 660 R Supermotard |
|---|---|---|
| Seat height | 876 mm | 875 mm |
| Wheelbase | 1,380 mm | 1,490 mm |
| Wet weight | - | - |
| Displacement | 125 cc | 660 cc |
Posture metrics
Knee angle
- Rieju Marathon 125 SM Pro
- Sport (57.9 deg)
- Yamaha XT 660 R Supermotard
- Sport (58.1 deg)
Hip angle
- Rieju Marathon 125 SM Pro
- Neutral (95.5 deg)
- Yamaha XT 660 R Supermotard
- Neutral (93.2 deg)
Elbow angle
- Rieju Marathon 125 SM Pro
- Relaxed (143.3 deg)
- Yamaha XT 660 R Supermotard
- Relaxed (143.3 deg)
Torso lean
- Rieju Marathon 125 SM Pro
- Neutral (11.0 deg)
- Yamaha XT 660 R Supermotard
- Neutral (12.6 deg)