scooter / default rider 183 cm
Yamaha NMAX 155 vs Yamaha Zuma 50 ergonomics
Yamaha NMAX 155 and Yamaha Zuma 50 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
Yamaha NMAX 155
All contacts reached
Yamaha Zuma 50
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 Yamaha NMAX 155 lists a 765 mm seat; the Yamaha Zuma 50 lists 765 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 | Yamaha NMAX 155 | Yamaha Zuma 50 |
|---|---|---|
| Seat height | 765 mm | 765 mm |
| Wheelbase | 1,350 mm | 1,275 mm |
| Wet weight | 127 kg | 94 kg |
| Displacement | 155 cc | 49 cc |
Posture metrics
Knee angle
- Yamaha NMAX 155
- Sport (57.8 deg)
- Yamaha Zuma 50
- Sport (57.7 deg)
Hip angle
- Yamaha NMAX 155
- Neutral (96.2 deg)
- Yamaha Zuma 50
- Neutral (98.0 deg)
Elbow angle
- Yamaha NMAX 155
- Relaxed (143.3 deg)
- Yamaha Zuma 50
- Relaxed (143.3 deg)
Torso lean
- Yamaha NMAX 155
- Neutral (10.6 deg)
- Yamaha Zuma 50
- Neutral (9.4 deg)