Sinnis Jet II vs UM Chill 50 (2021)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Sinnis Jet IIstacks up against the UM Chill 50. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Sinnis Jet II | UM Chill 50 |
|---|---|---|
| Model year | 2021 | 2021 |
| Price | — | — |
| Engine | 50 cc | 50 cc |
| Horsepower | 4 hp | 4 hp |
| Torque | — | 3 Nm |
| Weight | 135 kg | 91 kg |
| Seat height | 28 mm | 29 mm |
| Fuel capacity | — | 1.3 L |
| Fuel type | petrol | petrol |
| Transmission | Automatic | Automatic |
| Front brakes | Single disc. Hydraulic. | Single disc |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Tires | 3.50-10 / 3.50-10 | 110/70-12 / 120/70-12 |
Sinnis Jet II vs UM Chill 50 — which should you buy?
Picking between the Sinnis Jet II and the UM Chill 50 usually comes down to the numbers you care about most. On paper, the Sinnis Jet II brings 4 hp in a 135 kg package, while the UM Chill 50 counters with 4 hp at 91 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: