electric / default rider 183 cm
CAKE Osa+ vs Ultraviolette F77 Mach 2 ergonomics
CAKE Osa+ and Ultraviolette F77 Mach 2 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
CAKE Osa+
All contacts reached
Ultraviolette F77 Mach 2
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The CAKE Osa+ has a 795 mm seat; the Ultraviolette F77 Mach 2 sits at 800 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 CAKE Osa+ and 80 cm for the Ultraviolette F77 Mach 2.
That makes the CAKE Osa+ the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Ultraviolette F77 Mach 2 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 | CAKE Osa+ | Ultraviolette F77 Mach 2 |
|---|---|---|
| Seat height | 795 mm | 800 mm |
| Wheelbase | 1,340 mm | 1,340 mm |
| Wet weight | 98 kg | 197 kg |
| Displacement | - | - |
Posture metrics
Knee angle
- CAKE Osa+
- Sport (57.8 deg)
- Ultraviolette F77 Mach 2
- Sport (57.8 deg)
Hip angle
- CAKE Osa+
- Neutral (96.5 deg)
- Ultraviolette F77 Mach 2
- Neutral (96.5 deg)
Elbow angle
- CAKE Osa+
- Relaxed (143.3 deg)
- Ultraviolette F77 Mach 2
- Relaxed (143.3 deg)
Torso lean
- CAKE Osa+
- Neutral (10.4 deg)
- Ultraviolette F77 Mach 2
- Neutral (10.4 deg)