Znen Sun4 50 vs UM Chill 50 (2021)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Znen Sun4 50stacks up against the UM Chill 50. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Znen Sun4 50 | UM Chill 50 |
|---|---|---|
| Model year | 2021 | 2021 |
| Price | — | — |
| Engine | 50 cc | 50 cc |
| Horsepower | 2 hp | 4 hp |
| Torque | 3 Nm | 3 Nm |
| Weight | 76 kg | 91 kg |
| Seat height | — | 29 mm |
| Fuel capacity | 1.4 L | 1.3 L |
| Fuel type | petrol | petrol |
| Transmission | Automatic | Automatic |
| Front brakes | Single disc | 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 |
Znen Sun4 50 vs UM Chill 50 — which should you buy?
Picking between the Znen Sun4 50 and the UM Chill 50 usually comes down to the numbers you care about most. On paper, the Znen Sun4 50 brings 2 hp in a 76 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: