electric / default rider 183 cm
Alta Motors Redshift SM vs Sur-Ron Ultra Bee HP ergonomics
Alta Motors Redshift SM and Sur-Ron Ultra Bee HP land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Alta Motors Redshift SM
All contacts reached
Sur-Ron Ultra Bee HP
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Alta Motors Redshift SM has a 902 mm seat; the Sur-Ron Ultra Bee HP sits at 910 mm — a 8 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 90 cm for the Alta Motors Redshift SM and 91 cm for the Sur-Ron Ultra Bee HP.
That makes the Alta Motors Redshift 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 Sur-Ron Ultra Bee HP 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 | Alta Motors Redshift SM | Sur-Ron Ultra Bee HP |
|---|---|---|
| Seat height | 902 mm | 910 mm |
| Wheelbase | 1,438 mm | 1,380 mm |
| Wet weight | 128 kg | 89 kg |
| Displacement | - | - |
Posture metrics
Knee angle
- Alta Motors Redshift SM
- Sport (58.0 deg)
- Sur-Ron Ultra Bee HP
- Sport (57.9 deg)
Hip angle
- Alta Motors Redshift SM
- Neutral (94.3 deg)
- Sur-Ron Ultra Bee HP
- Neutral (95.5 deg)
Elbow angle
- Alta Motors Redshift SM
- Relaxed (143.3 deg)
- Sur-Ron Ultra Bee HP
- Relaxed (143.3 deg)
Torso lean
- Alta Motors Redshift SM
- Neutral (11.9 deg)
- Sur-Ron Ultra Bee HP
- Neutral (11.0 deg)