sport / default rider 183 cm
Aprilia RS 457 vs Yamaha TRX850 ergonomics
Aprilia RS 457 and Yamaha TRX850 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Aprilia RS 457
All contacts reached
Yamaha TRX850
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Aprilia RS 457 has a 800 mm seat; the Yamaha TRX850 sits at 795 mm — a 5 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 Aprilia RS 457 and 80 cm for the Yamaha TRX850.
That makes the Yamaha TRX850 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Aprilia RS 457 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 | Aprilia RS 457 | Yamaha TRX850 |
|---|---|---|
| Seat height | 800 mm | 795 mm |
| Wheelbase | 1,349 mm | 1,435 mm |
| Wet weight | 175 kg | - |
| Displacement | 457 cc | 849 cc |
Posture metrics
Knee angle
- Aprilia RS 457
- Sport (60.7 deg)
- Yamaha TRX850
- Sport (60.7 deg)
Hip angle
- Aprilia RS 457
- Neutral (99.6 deg)
- Yamaha TRX850
- Neutral (99.3 deg)
Elbow angle
- Aprilia RS 457
- Relaxed (143.3 deg)
- Yamaha TRX850
- Relaxed (143.3 deg)
Torso lean
- Aprilia RS 457
- Forward (25.2 deg)
- Yamaha TRX850
- Forward (25.6 deg)