supermoto / default rider 183 cm
Aprilia SX 125 vs Rieju Marathon 125 SM Pro ergonomics
Aprilia SX 125 and Rieju Marathon 125 SM Pro 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
Aprilia SX 125
All contacts reached
Rieju Marathon 125 SM Pro
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 Aprilia SX 125 lists a 880 mm seat; the Rieju Marathon 125 SM Pro lists 876 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 | Aprilia SX 125 | Rieju Marathon 125 SM Pro |
|---|---|---|
| Seat height | 880 mm | 876 mm |
| Wheelbase | 1,425 mm | 1,380 mm |
| Wet weight | 136 kg | - |
| Displacement | 124 cc | 125 cc |
Posture metrics
Knee angle
- Aprilia SX 125
- Sport (58.0 deg)
- Rieju Marathon 125 SM Pro
- Sport (57.9 deg)
Hip angle
- Aprilia SX 125
- Neutral (94.6 deg)
- Rieju Marathon 125 SM Pro
- Neutral (95.5 deg)
Elbow angle
- Aprilia SX 125
- Relaxed (143.3 deg)
- Rieju Marathon 125 SM Pro
- Relaxed (143.3 deg)
Torso lean
- Aprilia SX 125
- Neutral (11.7 deg)
- Rieju Marathon 125 SM Pro
- Neutral (11.0 deg)