Rieju 50 MRX Castrol vs Derbi Senda Racer (2005)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Rieju 50 MRX Castrolstacks up against the Derbi Senda Racer. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Rieju 50 MRX Castrol | Derbi Senda Racer |
|---|---|---|
| Model year | 2005 | 2005 |
| Price | — | — |
| Engine | 50 cc | 50 cc |
| Horsepower | 8 hp | — |
| Fuel capacity | 2.2 L | 1.5 L |
| Fuel type | petrol | petrol |
| Transmission | 6-speed | 6-speed |
| Front brakes | Single disc. 2 piston calipers | Single disc |
| Rear brakes | Single disc | Single disc |
| Tires | 80/90-21 / 110/80-18 | 80/90-21 / 110/80-18 |
Rieju 50 MRX Castrol vs Derbi Senda Racer — which should you buy?
Picking between the Rieju 50 MRX Castrol and the Derbi Senda Racer usually comes down to the numbers you care about most. On paper, the Rieju 50 MRX Castrol brings 8 hp, while the Derbi Senda Racer counters with its own power figure.
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:

