moped / default rider 183 cm
Tomos Flexer 25 SM vs Yamaha Y15ZR ergonomics
Tomos Flexer 25 SM and Yamaha Y15ZR land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Tomos Flexer 25 SM
All contacts reached
Yamaha Y15ZR
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Tomos Flexer 25 SM has a 800 mm seat; the Yamaha Y15ZR sits at 845 mm — a 45 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 80 cm for the Tomos Flexer 25 SM and 85 cm for the Yamaha Y15ZR.
That makes the Tomos Flexer 25 SM the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Yamaha Y15ZR gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.
Geometry snapshot
| Spec | Tomos Flexer 25 SM | Yamaha Y15ZR |
|---|---|---|
| Seat height | 800 mm | 845 mm |
| Wheelbase | 1,115 mm | 1,290 mm |
| Wet weight | - | - |
| Displacement | 49 cc | 150 cc |
Posture metrics
Knee angle
- Tomos Flexer 25 SM
- Sport (57.4 deg)
- Yamaha Y15ZR
- Sport (57.7 deg)
Hip angle
- Tomos Flexer 25 SM
- Neutral (101.7 deg)
- Yamaha Y15ZR
- Neutral (97.6 deg)
Elbow angle
- Tomos Flexer 25 SM
- Relaxed (143.3 deg)
- Yamaha Y15ZR
- Relaxed (143.3 deg)
Torso lean
- Tomos Flexer 25 SM
- Neutral (6.9 deg)
- Yamaha Y15ZR
- Neutral (9.6 deg)