standard / default rider 183 cm
Honda ST125 Dax vs Triumph Thunderbird Sport 900 ergonomics
Honda ST125 Dax and Triumph Thunderbird Sport 900 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
Honda ST125 Dax
All contacts reached
Triumph Thunderbird Sport 900
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 Honda ST125 Dax lists a 775 mm seat; the Triumph Thunderbird Sport 900 lists 775 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 | Honda ST125 Dax | Triumph Thunderbird Sport 900 |
|---|---|---|
| Seat height | 775 mm | 775 mm |
| Wheelbase | 1,200 mm | 1,550 mm |
| Wet weight | 107 kg | - |
| Displacement | 124 cc | 885 cc |
Posture metrics
Knee angle
- Honda ST125 Dax
- Sport (57.5 deg)
- Triumph Thunderbird Sport 900
- Sport (58.3 deg)
Hip angle
- Honda ST125 Dax
- Neutral (99.6 deg)
- Triumph Thunderbird Sport 900
- Neutral (91.8 deg)
Elbow angle
- Honda ST125 Dax
- Relaxed (143.3 deg)
- Triumph Thunderbird Sport 900
- Relaxed (143.3 deg)
Torso lean
- Honda ST125 Dax
- Neutral (8.3 deg)
- Triumph Thunderbird Sport 900
- Neutral (13.5 deg)