scrambler / default rider 183 cm
BSA Motorcycles Thunderbolt vs Triumph TR5T Trophy Trail ergonomics
BSA Motorcycles Thunderbolt and Triumph TR5T Trophy Trail 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
BSA Motorcycles Thunderbolt
All contacts reached
Triumph TR5T Trophy Trail
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 BSA Motorcycles Thunderbolt lists a 815 mm seat; the Triumph TR5T Trophy Trail lists 813 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 | BSA Motorcycles Thunderbolt | Triumph TR5T Trophy Trail |
|---|---|---|
| Seat height | 815 mm | 813 mm |
| Wheelbase | 1,466 mm | 1,384 mm |
| Wet weight | 185 kg | 159 kg |
| Displacement | 334 cc | 490 cc |
Posture metrics
Knee angle
- BSA Motorcycles Thunderbolt
- Sport (58.1 deg)
- Triumph TR5T Trophy Trail
- Sport (57.9 deg)
Hip angle
- BSA Motorcycles Thunderbolt
- Neutral (93.6 deg)
- Triumph TR5T Trophy Trail
- Neutral (95.4 deg)
Elbow angle
- BSA Motorcycles Thunderbolt
- Relaxed (143.3 deg)
- Triumph TR5T Trophy Trail
- Relaxed (143.3 deg)
Torso lean
- BSA Motorcycles Thunderbolt
- Neutral (12.3 deg)
- Triumph TR5T Trophy Trail
- Neutral (11.1 deg)