Yamaha Aerox 4 vs UM Chill 50 (2021)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Yamaha Aerox 4stacks up against the UM Chill 50. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Yamaha Aerox 4 | UM Chill 50 |
|---|---|---|
| Model year | 2021 | 2021 |
| Price | — | — |
| Engine | 50 cc | 50 cc |
| Horsepower | 3 hp | 4 hp |
| Torque | 3 Nm | 3 Nm |
| Weight | — | 91 kg |
| Seat height | 32 mm | 29 mm |
| Fuel capacity | 1.6 L | 1.3 L |
| Fuel type | petrol | petrol |
| Transmission | Automatic | Automatic |
| Front brakes | Single disc | Single disc |
| Rear brakes | Single disc | Expanding brake (drum brake) |
| Tires | 120/70-13 / 130/60-13 | 110/70-12 / 120/70-12 |
Yamaha Aerox 4 vs UM Chill 50 — which should you buy?
Picking between the Yamaha Aerox 4 and the UM Chill 50 usually comes down to the numbers you care about most. On paper, the Yamaha Aerox 4 brings 3 hp, 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: