sport / default rider 183 cm
QJ Motor SRK 421 RR vs Voge R125S ergonomics
QJ Motor SRK 421 RR and Voge R125S 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
QJ Motor SRK 421 RR
All contacts reached
Voge R125S
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 QJ Motor SRK 421 RR lists a 795 mm seat; the Voge R125S lists 790 mm — a 5 mm difference. 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.
On seat height alone, the Voge R125S has the easier modeled ground reach. Load your measurements into the simulator to compare the model, then verify both motorcycles in person.
Geometry snapshot
| Spec | QJ Motor SRK 421 RR | Voge R125S |
|---|---|---|
| Seat height | 795 mm | 790 mm |
| Wheelbase | 1,385 mm | 1,375 mm |
| Wet weight | 185 kg | 141 kg |
| Displacement | 421 cc | 125 cc |
Posture metrics
Knee angle
- QJ Motor SRK 421 RR
- Sport (60.7 deg)
- Voge R125S
- Sport (60.7 deg)
Hip angle
- QJ Motor SRK 421 RR
- Neutral (99.6 deg)
- Voge R125S
- Neutral (99.5 deg)
Elbow angle
- QJ Motor SRK 421 RR
- Relaxed (143.3 deg)
- Voge R125S
- Relaxed (143.3 deg)
Torso lean
- QJ Motor SRK 421 RR
- Forward (25.3 deg)
- Voge R125S
- Forward (25.3 deg)